tag:blogger.com,1999:blog-47322712539847412752024-02-18T23:52:19.283-07:00Mores Creek Summit Backcountry SkiingSnow Stability Assessment and ski/riding conditions for Pilot, Freeman, Sunset Peaks, and other Backcountry destinations in Central Idaho and Eastern Oregon.Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comBlogger159125tag:blogger.com,1999:blog-4732271253984741275.post-66908499923508151762018-12-04T11:02:00.003-07:002018-12-04T11:20:15.234-07:00Pilot Peak Conditions for December 3, 2018Excerpt:<br />
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Sunday we were unable to get to Mores Creek Summit. We left at dusk from Boise, but the road to Idaho City was closed until later in the day due to damaged power lines from treefall. We had to wait until Monday, December 3rd to ski tour Pilot Peak and ride fresh pow.<br />
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/304349513" webkitallowfullscreen="" width="640"></iframe> <a href="https://vimeo.com/304349513">Pilot20181203</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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<span style="background-color: #eaf0f4; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 15.4px; font-weight: 700;">Find complete blog posting at:</span><br />
<span style="background-color: #eaf0f4; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 15.4px; font-weight: 700;"><br /></span> <span style="background-color: #eaf0f4; font-size: 15.4px;"><span style="font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif;"><b>https://www.avyscience.com/blogs/avalanche-science/pilot-peak-conditions-december-3-2918</b></span></span>Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-35869156328714313312018-12-01T21:25:00.001-07:002018-12-01T21:25:23.822-07:00Pilot Peak Conditions December 1, 2918<div class="separator" style="clear: both; text-align: center;">
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Excerpt:</div>
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Today, the first day of December, around 4 AM when checking telemetry and weather forecasts, it appears like we will find 10+ cm of new snow at Mores Creek Summit. As we drove it kept snowing. By the time we made it up to MCS pass, a little more than 20 cm of light pow was waiting for snow recreationists. Temps at the MCS pass was -5 Deg C, with -8 Deg C at 8000 feet at Pilot Peak summit.<br />
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<img height="298" src="https://lh3.googleusercontent.com/d_UImRsdqYDmr84QkORlMCcJr2DmbVpYR98LfGmVYYNiCMbw3QgsMbEyQvKaJ6xl1-gChYWxLoVtQrDRCU0GCRHlb9zGHelCkIjlpm-ExEt0ucTtCKSM7q6Vr9i_GZsHTqnv_hrEKZDfgyPo5N2pSjjtvtORrdbXM6LmEbY0eBCWBXXWycGyiO8o4j_QIrpM_iWWon8hvCTHg3AQT0R2uwAlj5ptv8g6RPPMmo9ZQ5gL2h3clvdv9XbDTspJYln-5yMX7eqbc5_rjFeWfdnrP5FM_XLh_8QUkc4QAK8Tx1UqeOEgSmhRlXa9EMgNLmMwgaKI1uxMKCc63G2afvF_ZE35QfYCh78EkGBy2ualNaIFwxA0xTL0lqc5KwyvC_4R8jL9Lb1h1EphEjU3oRDbtWzzFZmHxRHmftFfhbKWlb_Ss_PgTucOM5_t-hTksVkm5R6hK2dmllb2Oes4o_QBSX1rgnKpYdqyxNjaj-cdlg8JF0MDzLHo3AB3SzOztH56MFnVFmJN-9vDyv64tyMr8V3yWGOnpUnBksJYL_bci_IgcXUcRciA7KPzNp4CpIZjuBjCb6POR6clJkKCzLQNgne2jCTHT63WY5VmM8QfviCB-M-LFfaspVXboJN4BKCYtdwYetK2U7V2k2sD3GU7giQYvg=w1039-h779-no" width="400" /></div>
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Find complete blog posting at:<br />
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<a href="https://www.avyscience.com/blogs/avalanche-science/pilot-peak-conditions-december-1-2918">https://www.avyscience.com/blogs/avalanche-science/pilot-peak-conditions-december-1-2918</a>Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-70734581454671934832018-11-29T13:36:00.001-07:002018-11-29T13:47:49.727-07:00Pilot Peak Conditions for November 28, 2018<span style="font-family: "helvetica neue" , "helvetica" , "arial" , sans-serif; font-size: 15px;">Excerpt:</span><br />
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<span style="font-family: "helvetica neue" , "helvetica" , "arial" , sans-serif; font-size: 15px;">After breaking trail yesterday from Mores Creek Summit pass at I21 to "Almost Top of The World," it felt like the riding will not be as fun. Typical of early winter conditions the skiing usually feels too bottomless. I was wrong. The skiing was FUN, and the snow was very supportive. Of course, during skiing, you must be careful and use judgment where to ski due to shallow conditions. Above 7000 feet the snowpack depth averaged 50 centimeters. The coverage was uniformly distributed through the landscape, with very little evidence of wind redistribution.</span><img alt="" src="https://photos.app.goo.gl/GdK9vLjiTb4epQvy8" style="font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 15px;" /><img alt="" src="https://photos.app.goo.gl/GdK9vLjiTb4epQvy8" style="font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 15px;" /><br />
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Visit avyscience.com blog for the complete post.<br />
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<a href="https://www.avyscience.com/blogs/avalanche-science/test">https://www.avyscience.com/blogs/avalanche-science/test</a>Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-5934614417221240372018-03-27T17:15:00.001-06:002018-03-28T09:14:56.329-06:00Galena Summit - March 26, 2018It was about time to ski tour at other location in Central Idaho besides MCS. This year I skipped my Colorado teaching tour, and concentrated my efforts in Idaho, with three exceptions, a trip to Alaska to teach a Level 2 at Hatcher Pass, taught a PRO Bridge Course in Utah, and lead a snow/avalanche science field camp at Soldier Mountain-Fairfield.<br />
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A few days ago - I reminded myself that visiting other ranges with a contrasting snowpack development is very important for the continuous improvement of snowpack assessment skills.<br />
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<tr><td class="tr-caption" style="text-align: center;">I-75 - East side of Galena Pass, approximately 8100 feet</td></tr>
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Thus, yesterday I spent the day at Galena Summit. The day was sunny and tranquil with light winds. Skiing conditions were fine as long as you avoided any snow below 8500 feet and sought slopes minimally impacted by solar radiation. Steep terrain can be found at Galena Summit slopes, but there is plenty of terrain with moderate angles for those just getting introduced into backcountry skiing or for those that are satisfied with good pow conditions without having to deal with avalanche terrain.<br />
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At the end of the day, as we skied back to my vehicle and we drop below 8500 feet in elevation, the skiing became desperate ... it did not matter aspect, or shaded snow, or snow near the protection of trees. Skiing below the 8500 reminded me about a surfing poster at <a href="http://www.aquaticapr.com/">Aquatica</a> (my cousin surf shop in Puerto Rico) which I included below. As I skied down and my skis relentlessly broke through the breakable crust, I was making the same desperate plea the lonely surfer made ...<br />
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<tr><td class="tr-caption" style="text-align: center;">"Dear God if you are listening .... but I'm going to need an answer pretty quick"</td></tr>
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As usual, you can never get tired by the spectacular views from Galena Summit. The Sawtooth, White Clouds, Boulder, and Smokies ranges dominate each cardinal direction.<br />
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A quick snowpit revealed that the snowpack top 1-meter structure lacked structural weaknesses (slab over weak layer, facet weak layer, a difference in crystal size larger than 1 mm) below the 20 cm depth at the snowpit location (NE aspect, 9100 feet, 32 degrees slope).<br />
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<tr><td class="tr-caption" style="text-align: center;">Snowpit at 32-33 degrees slope with 60 degrees East aspect</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Snowpit at ~9100 feet, topmost 1-meter.</td></tr>
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<tr><td style="text-align: center;"><a href="https://2.bp.blogspot.com/-Qp6lsj8rt9E/WrqW9cQsUGI/AAAAAAABDSg/3uZR-alv89IaCet_srlQ_b5_z6xVQNC3QCKgBGAs/s1600/GalenaPass-26-Mar.png" imageanchor="1" style="margin-left: auto; margin-right: auto; text-align: center;"><img border="0" data-original-height="840" data-original-width="994" height="336" src="https://2.bp.blogspot.com/-Qp6lsj8rt9E/WrqW9cQsUGI/AAAAAAABDSg/3uZR-alv89IaCet_srlQ_b5_z6xVQNC3QCKgBGAs/s400/GalenaPass-26-Mar.png" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Snowpit diagram for Galena Summit snowpack at 9100 feet elevation, 60-degree aspect, 32-33 slope angle, using the online free app available at <a href="http://snowpilot.org/">snowpilot.org</a> - A great way to contribute to snow science by sharing your pit in a database used for avalanche research.</td></tr>
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Storm interfaces can lead to storm slab avalanche problem if a less cohesive interface is buried by storm snow. The next picture for Galena Summit top 20 cm of the snowpack shows two storm weak layers as lighter lines in the "thin slice" due to their "intrinsic" lower density.<br />
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<tr><td class="tr-caption" style="text-align: center;">Storm Interfaces (red arrows) at Galena Summit - March 26, 2018.<br />
Blue arrow points to a developing near surface facet layer above a wind crust.</td></tr>
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The two storm interfaces identified might be too shallow to be of concern for most of the terrain around Galena Summit. However, in steep terrain with large acreage or terrain complexity (multiple avalanche paths, cliffs, terrain traps, etcetera) a soft slab release at a depth of 20 cm can entrail enough snow to threaten a skier. Last weekend (Sunday, March 18, 2018) a similar storm slab with a depth of 20 cm was triggered by a skier at Mores Creek Summit's steep terrain near Whoop-Em-Up headwaters area. This small skier-triggered avalanche resulted in the loss of a ski and a light injury to the single victim.<br />
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The topmost 20 cms showed two storm layers (or interfaces) failed easily during "tilt tests".<br />
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<tr><td class="tr-caption" style="text-align: center;">The two failed fracture planes from the tilts test - picture by Thia Konig.<br />
"Backlit" thin slice of top 50 cms in the background.</td></tr>
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Tilt tests efficiently identify fracture planes during soft slab conditions. When soft slab conditions are present it is often hard to reliably perform compression tests (CT and ECT) without negatively impacting the column. That was the case when assessing the topmost 20 cms at Galena Summit this Monday, as well as last week at MCS. For soft slab conditions, tilt tests become the primary tool to identify fracture plane failures. The tilt test consists of tilting a section of a column by 5-15 degrees and gently "hitting" with the hand the shovel blade from underneath.<br />
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Storm slab instability unlike persistent slab, last a short time. The storm weak layer promptly go through rounding and sintering metamorphosis. It might not make sense to spend time writing and commenting on this problem, considering that the current temperate temperatures will promote the sintering of the storm weak layers by the time most readers read this post. However, this might serve as a "teachable" moment to make backcountry users aware that storm slab instabilities can be assessed with tilt tests as well other less popular tests when conventional compression tests are challenged by pow and soft slab conditions. Avalanche educators (<a href="http://avyscience.com/">avyscience.com</a>) have continued to add valuable additional stability assessment tools to recreationists as we learn more from Avalanche research. Thus you must ask yourself ... when was the last time you refreshed your avalanche knowledge? Are you aware of all of the advancements in snow/avalanche science? Are you current with the latest stability assessment techniques for snowpack structure, stability tests, and standardized documentation?<br />
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The next sample of pictures illustrates a prevalent type of avalanche I observed at Galena Summit's nearby peaks. I found interesting that many of the avalanche releases were located at or near rocky steep features. I do not have enough information to classify these releases, but based on the snowpack history, propagation, and apparent depth, it is reasonable to guess that these releases are associated with a persistent weak layer.<br />
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<tr><td class="tr-caption" style="text-align: center;">A sample of Avalanche releases viewed from Galena Pass.</td></tr>
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There are some many other places besides MCS, Galena Pass, and Copper Mountain that offer fun skiing and cool tours. As spring advances, postings from other areas besides MCS will start to trickle in.<br />
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<tr><td class="tr-caption" style="text-align: center;">Bear Claw - May 2017</td></tr>
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Above a sample of little-known area with complex and amazing ski terrain. I will be visiting it during the next few days.Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-83531007347345279522018-03-19T09:55:00.004-06:002018-03-20T13:46:35.412-06:00Life is good with POW turns and face-shots!<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/260751955" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/260751955">MCS20189318full</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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I am sorry to do this again ... start a blog with a video and no words ... However, there are no words to describe the current conditions. Words like "Superb" or "Awesome" or "Fantastic" seems so lacking, thus I decided to leave it to your imagination.<br />
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Yesterday was another sweet day of pow skiing. It was the last day of another Avalanche Science's (<a href="http://avyscience.com/">AVYSCIENCE.COM</a>) Level 1 course. After a short classroom session at Idaho City's Visitor Center's developing a tour plan, we left for MCS pass.<br />
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A critical outcome of Level 1 course is for participants to be able to able to generate a local avalanche forecast and integrate information from the weather, snowpack, and prior snow/Avalanche/weather observations into a ski touring plan. Below an example of what Paul and I generated Sunday morning before going skiing.<br />
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<tr><td class="tr-caption" style="text-align: center;">Avalanche Level 1 participants learn to prepare a plan for ski touring prior to arriving at the mountain!</td></tr>
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Our original plan was to return to where we skied the prior day (Summit Creek Glades) but IDT did not clear the 1st pull-out north of the MCS pass, thus we decided to change plans and ski Freeman Peak.<br />
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We followed a track from another party until we got to a chocking point at Mores Creek, where it is prudent to cross the creek and avoid crossing below an avalanche path facing a southwest aspect. We crossed the track and started cutting a new track in a more reasonable location. After snapping a picture of the party uphill track crossing the avalanche path, where two storm releases were covered by new snow but still visible, I lost my camera in the deep snow. Bummer! If anybody finds the black Canon point and shoot camera, PLEASE contact me (contact info at <a href="http://avyscience.com/">avyscience.com</a>).<br />
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Evidence of instability was hard to find. A friend reported a human trigger soft slab mid-slope at Freeman on Saturday at an NNE aspect steep slope (40 degrees) at approximately 7000 feet in elevation. We visited the location but the release has been covered by new snow. Stability test at the location revealed a weak layer of graupel buried at 45 cms. The layer was visible as a fragile thin layer 5 cms above last week rain crust. Compression tests are ineffective in soft snow conditions detecting fracture failures. Easy tilt test results suggested that this layer should be carefully evaluated. This layer failed the PST as well as an experimental CPST (horizontal PST) - PST 45/100 (END)! Ski cuts at various steep slopes did not produce any evidence of reactivity. We treated this "storm slab" problem as a "stubborn" with regard to trigger likelihood. This is typical of graupel weak layers, and we approached steep terrain with care.<br />
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<tr><td class="tr-caption" style="text-align: center;">Winter wonderland!</td></tr>
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We skied northeast, deep north, and southeast aspect slopes, with the goal of getting familiar with the snowpack development at the various aspects, one of the objectives of the avi course.<br />
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<tr><td class="tr-caption" style="text-align: center;">Freeman Southeast aspect - headwaters of the 12-mile creek.<br />
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<tr><td class="tr-caption">Paul (Avi course participant) with Freeman's "Rando Ridge" in the background.<br />
Lots of NE aspect skiing at Freeman's southeast ridge, an area that gets very few visits.</td></tr>
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I have thoroughly enjoyed having avalanche courses at MCS. At the same time, it has been bittersweet. During the last two weeks, It is hard to ignore how avalanche education might greatly improve skin tracks and downhill movement of skiers of Boise Backcountry riders.<br />
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I have observed numerous instances of mistakes cutting an uphill track that will negate safe uphill travel. And the lack of best practices during skiing is outstanding - with folks skiing above each other at slopes with 30 degrees or more in steepness. I have to wonder if they internalize that they are traveling in avalanche terrain and that MCS does indeed have serious avalanche terrain. I include a video of January 12 avalanche cycle at MCS.<br />
<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/251067545" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/251067545">Pilot Jan 12 2018</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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Meanwhile, there is very little effort by the some of the Boise backcountry community in becoming aware of the snowpack structure below the skis. And I am not insinuating digging pits - that will be preposterous - but I did not see any parties during this weekend doing quick hand-pits or opportunistic ski cuts in their uphill ski tracks. What a missed opportunity to learn about a snowpack when it was heavily stressed by 50 cms of NEW snow!<br />
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Statistics from this blog suggest that there is a large community interested in ski touring at MCS. But only a handfull are really taking advantage of the courses being offered at MCS!<br />
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<tr><td class="tr-caption" style="text-align: center;">Statistics for MCS - Idaho readers, March 2018</td></tr>
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The lack of participation in Avalanche Science courses is confusing at best. There is plenty of snow at MCS and the avalanche courses are close to Boise. It only takes 20 minutes from the Idaho City classroom to the trailhead, and learning is maximized by keeping class size small (a goal of 4-6 participants). Besides, the field classroom is primed with exceptional condition conducive to learning with the presence of storm slab, persistent slab, wind slabs, and dry-loose avalanche conditions - What is going on?<br />
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I have to wonder if the existence if this blog is a barrier to avalanche education. Am I doing a disservice to the community by posting updates that decrease a perceived need for avalanche education? I will be thinking hard about this question and will be considering changes to the style, content, and available resources at MCS blog.Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-83005532054692073272018-03-18T05:57:00.001-06:002018-03-18T06:03:15.075-06:00Saturday, March 17-208 - Face Shots Day at MCS!<br />
<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/260600475" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/260600475">Paul20180317</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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WHAT A DAY YESTERDAY - SATURDAY, March 18th, 2018. The skiing was phenomenal. Face Shots all day. And very little evidence of instability, that allowed us to ski steep gullies.<br />
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Check how much snow was at my vehicle at the end of the day.<br />
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Yesterday we were on our second day of an Avalanche Science Level 1 course. Below three pictures of Paul a participant, thinking at the trailhead and later riding at the Summit Creek Glades.<br />
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This is a very short post. Gotta get going to the last and third day of the Avi L1 course at MCS. But will share first a brief summary of stability obs. Yesterday at a wind loaded locations the snowpack was reactive, we experienced a localized "whumpf" and at steep roll-overs ski cuts produced in cracks. Early in the day, the snowpack was unreactive, but as the storm totals exceeded the 30 cms in the afternoon we started to observe reactivity increase. The storm slab problem was restricted to an interface that yesterday afternoon was present below 20 cms. This interface was easily recognized with a tilt test (easy failures, single tap after 15-degree tilt).<br />
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Today it will be prudent to approach terrain with a dose of respect. Last night precipitation (approaching the 40-50 cm depth at specific locations), as well as the slab gaining cohesivity (due to rounding/sintering as well as wind effects), might augment the reactivity of the storm slab. And - even when yesterday's forecast called for light winds at MCS, there were locations with sustain moderate winds with significant snow transport and slab hardening!<br />
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Have fun! And get out there, pow conditions are great.Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-74903893575449594152018-03-15T23:23:00.001-06:002018-03-16T04:58:30.249-06:00Top of The World - March 15, 2018Wednesday (March 14, 2018) morning Bogus Basin exceeded my expectations. The skiing was phenomenal! Some areas of the mountain were blanketed with an excess of 25 cms of POW snow. Careful selection of ski lines rewarded the rider with up to 30 cms of pow, the result of wind transported snow at the right locations.😁<br />
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For two hours I skied on untracked snow. Do you know how rare is that at Bogus nowadays? Unfortunately, I had to get back down to Boise by 1:00 PM and co-teach the Avalanche and Snow Physics class being offered at BSU.<br />
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Tomorrow an Avalanche Level 1 course starts at Mores Creek Summit. Thus I visited Pilot Peak today to gauge the snow conditions and prepare tour plans for the avalanche course. The next video summarizes some of the snow conditions we encountered today at Mores Creek Summit, in the area known as Top of The World.<br />
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/260356395" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/260356395">Chago20180315</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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Not bad skiing, not bad at all! We spent the day skiing Top of The World, where we found as much as 15 cms of new snow in the top of a rain-soaked crust. The new snow at Top of the World was sufficiently dry but creamy/dense to keep the ski edges off the underneath wet crust. Air temperatures were pleasant, in the - 4 Deg-C with light south winds. No evidence of storm, persistent, or wind slab was observed.<br />
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I must admit that I was expecting the usual MCS snow dump. When Bogus gets snow, MCS always gets more - a lot more! That was not the case with the latest storm.😞 Early in the morning, I checked the MCS Snotel and the site has received approximately 3.3 cm of SWE (Snow Water Equivalent). Assuming 10% density snow, that could have been as much as 33 cms of snow. The snow depth sensor for the MCS Snotel was not reporting values this morning, thus I had no means to estimate storm snow totals. It turns out that probably half of the 3.3 cm of SWE precipitated as snow at elevations as high as 8000 feet at MCS peaks.<br />
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<tr><td class="tr-caption" style="text-align: center;">MCS - 5800 feet in elevation, no snow on trees<br />
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Bogus Basin Road - 5800 feet elevation.</td></tr>
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As the day progressed we kept our hope that the persistent fog will clear and the sun will come out. Instead, nature only gave us limited moments of cloudy skies without fog.<br />
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The next sequence shows Eric skiing during today's "flat light" conditions due to fog.<br />
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For folks that are reading this blog and that are new to the area, you should consider participating on one of the various avalanche or introductory backcountry skiing courses offered at Mores Creek Summit. Not only will you learn about safe travel in avalanche terrain, but you be will mentor about the best places to ski at Mores Creek Summit.<br />
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Avalanche Science's course participants are limited to a small number of participants. Not only that improves the learning outcomes, but you get to do a LOT of skiing for three days. Check <a href="http://avyscience.com/">avyscience.com</a> for courses scheduled for this month.<br />
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A few days ago I shared the following write up about Reliable Partners at Avalanche Science FaceBook page. I include the FB post as closing remarks for this post.<br />
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-- Reliable Ski Partners --</div>
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Though topic to write about it. I have been doing a lot of thinking about it ... and I will be soon making a blog entry about it.</div>
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A reliable partner is not only a companion that reliably contributes to a trip planning, but also is a well-trained rescuer.</div>
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In order to be an effective partner during trip planning, it is essential to be exposed to 'situational awareness' and 'decision making' principles related avalanche terrain travel. Perception of the environment, key in situational awareness, demands to understand the avalanche problem at hand as well as being familiar with human factors (biases, syndromes, group tactics, among others). But situational awareness also requires comprehension of the elements (avalanche release, snow metamorphism, the impact of weather factors in instability) to anticipate avalanche danger. Assessment of avalanche danger is a key ingredient to generate ski touring plans where risk is mitigated through the selection of appropriate terrain for the day conditions.</div>
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Avalanche Level 1 courses are designed to provide participants with the fundamentals of Situational Awareness and Decision Making in Avalanche Terrain.</div>
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But a reliable partner also needs to be a competent rescuer. During Avalanche Science courses every participant has to demonstrate that they can reliably perform a single victim rescue (50-meter area, 1.2-meter depth) in less than 5 minutes.</div>
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The demand from Boise skier community for Avalanche Courses at Mores Creek Summit has been disappointing. It is true that there are other local providers that do a terrific job teaching the principles outlined above. However, there are a lot more skiers in Boise accessing the Idaho backcountry that it is possible to accommodate through local providers.</div>
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So I need help understanding why The Boise Backcountry skiers are not taking the opportunity to take avalanche courses at Mores Creek Summit. Why not become Reliable Ski Partners?</div>
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Visit<span class="Apple-converted-space"> </span><a data-ft="{"tn":"-U"}" data-lynx-mode="origin" href="https://l.facebook.com/l.php?u=http%3A%2F%2Favyscience.com%2F&h=ATM0XSSe1cg-ANJXgKv26hrYc6STHT4HkjJHX36wB8UwRBGasgkJheh1PB5a_9SuMgjBggaIydx6UvTbqE_d4uAXTK1CBiuNkTKlAcXif98dEaCF9c9qJov7Wm9M9QnSkA8gqy4" rel="nofollow" style="color: #365899; cursor: pointer; font-family: inherit; text-decoration-line: none;">avyscience.com</a><span class="Apple-converted-space"> </span>for avalanche courses at Mores Creek Summit.</div>
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<br />Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-62326468469713237592018-03-11T08:56:00.002-06:002018-03-11T11:42:21.264-06:00Spring-like ConditionsSaturday was a spectacular day at Mores Creek Summit, with very few skiers visits and a big snowmobile crowd taking advantage of the good snow conditions and spring-like conditions.<br />
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At lower elevations, there was about 5-10 cm of new snow covering a supportable crust. Above 7200, surface snow conditions improved greatly with no perceptible buried crust interface and about 20 cm of new snow that has transformed overnight into diurnal recrystallized "near surface facet (NSF)" snow - what sometimes we accurately refer to "snow that has dried-out". This is accurate due to the fact that during the faceting process a volume of snow mass is lost to sublimation, as the precipitation snow is sublimated and deposited within the snowpack as facet crystals.<br />
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Above the new NSF we observed a widespread layer of surface hoar formed overnite.<br />
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<tr><td class="tr-caption" style="text-align: center;">Surface hoar across my ski tips </td></tr>
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By the end of the day, the warm temps and strong solar radiation had destroyed the surface hoar at all aspects with the exception of deep north slopes.<br />
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The first run of the morning was a surprise. Surface snow conditions were better than expected.<br />
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<tr><td class="tr-caption" style="text-align: center;">Almost Top of The World - 1st run of the day</td></tr>
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We recognized that today's warm temps and intense solar radiation were going to impact the snow rather soon, thus we set our bearings into Whoop-Em-Up headwaters.<br />
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<tr><td class="tr-caption" style="text-align: center;">Whoop-Em-Up Headwaters Avalanche Path</td></tr>
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We were fortunate that a party skiing at Whoop-Em-Up on Friday did not ski the avalanche path below the cornice. 😄Thanks! Turns were sweet, but it had enough "east" and we knew it would not stay powdery for too long. We spent the rest of the day at the more northerly slopes of Whoop-Em-Up headwaters.<br />
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<tr><td class="tr-caption" style="text-align: center;">Whoop-Em-Up Headwaters North aspect slope</td></tr>
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<tr><td style="text-align: center;"><a href="https://3.bp.blogspot.com/-vJa3U-Un6cM/WqUpboXUx2I/AAAAAAABCNs/GjPAuJlSkTAyCNrfzOpypf-anBmLtJYLACKgBGAs/s1600/image.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="768" data-original-width="1024" height="300" src="https://3.bp.blogspot.com/-vJa3U-Un6cM/WqUpboXUx2I/AAAAAAABCNs/GjPAuJlSkTAyCNrfzOpypf-anBmLtJYLACKgBGAs/s400/image.png" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Eric contemplating where to lay tracks next</td></tr>
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A week ago there where three reactive layers at MCS; two storm slabs at 35 and 60 cm, and a persistent slab at 95 cm. Predictably, the storm slab problem reactivity was already decreasing by last Sunday. We did not find any evidence of instabilities associated with the precipitation event a week ago.<br />
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The persistent slab problem at MCS is found in specific areas such as shallow low elevation aspects (fortunately where we do not like to ski!) and at rocky and shallow northerly aspects above 7600. Those familiar with MCS recognize that these specific features are rare and easily recognizable. Besides, MCS skiers and sleds go for the readily available deep snowpack and rock-free areas to play in the snow.<br />
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As we skied down Lamar ridge the impact of solar radiation and warm temps became unmistakable - snow surfaces at east aspect slopes were saturated with liquid water. And it did not matter how good was the wax job in your ski, the ski difficulty level went rapidly up! 😰<br />
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It should be noted that we carefully selected a safe route down a south aspect slope with a shallower snowpack. At one point the "full" slope (under 30 degrees) fractured as I skied across it and energetically and unapologetically whumped as it collapsed few cms down in unison. A steeper slope would have avalanched. This instability is well known - a persistent slab at lower elevations. This instability was not related to either a wet loose or wet slab problem. It was simply the reactivation of an old persistent problem due to "snow creep" caused by warm temperatures creating traction at the slab and polycrystal/facet layer interface. This is the interface that Payette Avalanche Center continues to warn us about it, and that can be found at MCS.<br />
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Last Wednesday I went early in the morning with the intention of skiing the northwesterly aspect slopes of Mack's Creek, below Bogus Basin "Triangle" ski area and to do snow research work for the Avalanche and Snow Physics class I am supporting Hans Peter Marshall teach at Boise State Unversity.<br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgR_Pr-7Jf0UIfX6phz7BMSHBM_MiZBpaNjAiEdpGMAJS2uafnAs8VOryWvHLPVdejV69b58FXJnftKWIkprJAa-qwpbvyzK5shNZI0Wxf4ueoZKGDlZTFW4qvmcHzDV5xN6JR7m-YKyyCF/s1600/image.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="768" data-original-width="1024" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgR_Pr-7Jf0UIfX6phz7BMSHBM_MiZBpaNjAiEdpGMAJS2uafnAs8VOryWvHLPVdejV69b58FXJnftKWIkprJAa-qwpbvyzK5shNZI0Wxf4ueoZKGDlZTFW4qvmcHzDV5xN6JR7m-YKyyCF/s400/image.png" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">North-westerly slopes above Mack's Creek near Bogus Basin</td></tr>
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I desisted in doing some side-country skiing after realizing that the snowpack at Bogus Basin backcountry remains shallow, and I did not feel like dealing with brush-covered slopes. The skiing at Mack's creek can be quite good since the snow is protected from winds and solar radiation. Below a sample of pictures from last March 2017.<br />
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<tr><td class="tr-caption" style="text-align: center;">Top of Bogus Basin from Mack's Creek NW aspect slopes.</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Cold snow at Mack's Creek<br />
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<tr><td><a href="https://1.bp.blogspot.com/-FMmvDuP4IXU/WqU1Em1yijI/AAAAAAABCOc/DQ8ot8gsNEYkp-zAxQHeDVymHaAKYntxACKgBGAs/s1600/IMG_8016.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="1200" data-original-width="1600" height="300" src="https://1.bp.blogspot.com/-FMmvDuP4IXU/WqU1Em1yijI/AAAAAAABCOc/DQ8ot8gsNEYkp-zAxQHeDVymHaAKYntxACKgBGAs/s400/IMG_8016.JPG" width="400" /></a></td></tr>
<tr><td class="tr-caption">Mack's Creek slopes from Bogus Basin</td></tr>
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Instead of skiing, I identified a side-country slope near the Bogus Basin access gate for Mores Mountain, where I spent part of the morning doing snow research.</div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhFqa0dUCH-ksFlM9-UXK8YikSDe1l2jWfNmiY1fu8iCguA7nQdFRUvVooVfRhxwP4ckBt28xPpLgevjf40hzNr5_EJndkcP_0GkDXK-Q2NJ6J5HuEN1LiApglFNe24u-OOE-jd4vj7MkDP/s1600/image.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="768" data-original-width="1024" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhFqa0dUCH-ksFlM9-UXK8YikSDe1l2jWfNmiY1fu8iCguA7nQdFRUvVooVfRhxwP4ckBt28xPpLgevjf40hzNr5_EJndkcP_0GkDXK-Q2NJ6J5HuEN1LiApglFNe24u-OOE-jd4vj7MkDP/s400/image.png" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">During snow, research scientists record snow layer depths normal to the snow surface, not "plumb"!</td></tr>
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-rUlfviVTwvw/WqU2eVBCUoI/AAAAAAABCOo/_dGrOHZcaQQ_1IezhnTY3vKV0xXYfYvfgCKgBGAs/s1600/image.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="768" data-original-width="1024" height="300" src="https://1.bp.blogspot.com/-rUlfviVTwvw/WqU2eVBCUoI/AAAAAAABCOo/_dGrOHZcaQQ_1IezhnTY3vKV0xXYfYvfgCKgBGAs/s400/image.png" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Very rare event - Two Denoth instruments in the same pit! Thre are very few snow capacitance instruments in the world (Expensive).</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi8rksnXUTqFv5MnFfRbJgxAE5kOI2JqQUGC04d0sPBoB4ToIhJTmP8h4Tshp96GNUgjgQxJ_8CL-C2njqLMjXw_R5u-AehsKaJzXBOX8107TIV-hlf_C1n1QbfEBIxDDXtN3B9lSPZM-2y/s1600/image.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="1024" data-original-width="768" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi8rksnXUTqFv5MnFfRbJgxAE5kOI2JqQUGC04d0sPBoB4ToIhJTmP8h4Tshp96GNUgjgQxJ_8CL-C2njqLMjXw_R5u-AehsKaJzXBOX8107TIV-hlf_C1n1QbfEBIxDDXtN3B9lSPZM-2y/s400/image.png" width="300" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Using capacitance plates to measure the snow resistance to an electromagnetic field (a physical property called permittivity).</td></tr>
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The experiment required to have a dry snowpack. I was generating data for a BSU GEOS 466-566 class homework where students evaluate the use of a capacitance-based sensor to estimate snow density.<br />
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<tr><td class="tr-caption" style="text-align: center;">Capacitance measurements versus snow density (gm/cc)</td></tr>
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Capacitance sensors are almost always used to estimate the amount of liquid water in the snowpack. But when the snowpack is dry, the capacitance sensor estimates the resistance of snow to an electromagnetic field. This property is referred as permittivity, and in a snowpack free of liquid water permittivity is a function of density. Snow science is soooo COOL! 🤓<br />
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A final topic to write about, and I must declare that I am uncertain how to communicate to the timber sled users. Mores Creek summit coexistence between snowmobilers and backcountry riders is something I feel proud about it. We depend on each other. I feel safer with the presence of snowmobilers. I KNOW they are my HELPLINE if an emergency arises! Also, the snowmobile community has gone out of the way NOT to impact the area accessed by backcountry riders. I respect them greatly for that.<br />
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Last year I started to observe timber-sleds accessing terrain used by skiers. I considered these occasional incidents as part of the learning process for these new "timber-sled" users. Besides, I always espoused the belief that MCS is a large area, and the perception of crowding is the result of lack of imagination of where to go skiing. However, I was deeply concerned about the unsafe manner timber sleds traveled through steep terrain - cutting sideways through significant distances. This is annoying to some of us that care about the aesthetics of ski lines since large tracks of ski terrain get unnecessarily impacted. The truth is that this season I had seen many skiers doing the same with their uphill tracks!<br />
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This past Saturday as I skied down to the I-21, it was hard not to notice the significant timber-sled side-hilling across the terrain used by skiers next to Almost-Top-of-the-World (see pictures below).<br />
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<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: 12.8px;">Timber-sleds tracks across slopes </span>next to "Almost-top-of-the-World.</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Timber-sleds tracks across slopes</td></tr>
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In the meantime, timber sleds need to be made aware (and some backcountry riders too!) that it is NOT SAFE to sidehill steep slopes. There is a BIG-BIG-BIG difference when sleds go uphill/downhill on a slope in contrast to going across the full slope width in what appears to be an attempt at finding the weak spot in the slope. And the awareness needs to also include the fact that timber sleds are required "snowmobile" registrations. And that state of Idaho requirement is being short-circuited by some timber sled users. I close this topic asking the snowmobile community to try to mentor the timber sled users. I realize it is unfair to ask you to carry this burden, but the truth is that you are in a better position than the backcountry skiing community, since motorized users share the same passion for winter recreation with power machines.Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-91091669499001039752018-03-05T18:39:00.002-07:002018-03-06T20:20:28.102-07:003rd Avalanche Level 1 course at Mores Creek SummitSunday, March 4 we completed the 3rd Avalanche Level 1 course at Mores Creek Summit. The snow conditions were fun and we had a dynamic snowpack that provided lots of opportunities to hone the course participants stability assessment skills.<br />
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Jeremy and Brendon successfully completed the Avalanche Science's Level 1 course. They demonstrated that they can produce a travel plan, generate avalanche risk assessment using the Avalanche Conceptual Model, and reliably complete a full rescue of a single victim buried at 1.2 meters in less than 5 minutes, earning them a certification in addition to their AIARE diploma.<br />
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During the three days, we skied some of the best lines at Winter Corner, Summit Creek Glades, Lamar Ridge, and Whoop Um Up Steep headwaters. The snow was consistently good at all elevations and aspects.<br />
<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/258702307" webkitallowfullscreen="" width="640"></iframe> <a href="https://vimeo.com/258702307">AVIL120180302</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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Last weekend the snowpack conditions were ideal to observe weak layer rounding and sintering of precipitation particles responsible for a "storm slab" problems at elevations below 7000 feet. At elevations above 7500 feet, the storm slab continued to be reactive, with CTEQ1 results at 30-35 and 60-65 cm depths. Colder temperatures (-10 Deg-C) slowed down the rounding/sintering and settlement of the snowpack. In contrast, at 6100 feet there was as much as 10 cm of settlement (densification, NOT whumpfing) in the snowpack.<br />
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<tr><td class="tr-caption" style="text-align: center;">Snowpit at shallower low elevation terrain.</td></tr>
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At shallow lower elevations, the early season depth hoar continues to be reactive to stability tests, but not at mid elevations (7000 feet). Above 7500 feet, slopes with north component continue to produce evidence of instability for propagation at the 1-meter depth (from the early season depth hoar event).<br />
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The course participants were challenged by the variable distribution of wind and deep persistent slabs but were able to select terrain in excess of 30 degrees to keep pow skiing exciting. Evaluation of storm slab became routine with their new found knowledge and stability assessment skills.<br />
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<tr><td class="tr-caption" style="text-align: center;">High elevation terrain - Steeper and deeper snowpack.</td></tr>
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There have been in Idaho a number of avalanche incidents during the last few days. Below I share a picture from a skier triggered avalanche from last Sunday. The party involved want to remain anonymous. Fortunately, the two persons involved were not harmed by the avalanche. They recognized their mistake and will be taking an avalanche course soon.<br />
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The avalanche in the above picture did not occur at MCS. Apparently, some assumed it had. I did not provide details to protect the anonymity of a friend. For reference, I include the information shared on FB:<br />
<span class=" UFICommentActorAndBody" style="background-color: white; border-radius: 18px; color: #1d2129; display: block; font-family: , , "blinkmacsystemfont" , ".sfnstext-regular" , sans-serif; font-size: 13px; line-height: 16px; padding: 8px 10px;"><span style="font-family: inherit;"><span style="font-family: inherit;"><span data-ft="{"tn":"K"}" style="font-family: inherit;"><span class="UFICommentBody _1n4g" style="font-family: inherit;"><span style="font-family: inherit;"><span style="font-family: inherit;">This avalanche occurred to somebody I ski with in the backcountry. My friend was skiing with another person last Sunday. I should highlight - my friend is an experienced skier and knew they entered avalanche terrain. But my friend was skiing with anot</span></span><span style="font-family: inherit;"><span style="font-family: inherit;"><span style="font-family: inherit;">her person that went the wrong way and triggered the avalanche at a low 30's slope with a lower elevation northerly aspect. The person that triggered the slide hold to a tree, and was unharmed from the D2 slide.</span><br /><br /><span style="font-family: inherit;">The avalanche failed at the facet layer below the new snow. The distribution of this persistent slab is variable. I observed it last Friday at Sunset Peak burnt areas characterized as snow fetching areas due to the recent NE winds. These low elevation shallow areas are NOT where we expect them to be! Skiers need to visually identify snow transported areas (ablation and accumulation) and continue checking for what's BELOW the new snow. Hand pits baby, hand pits.</span></span></span></span></span></span></span></span><br />
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This posting should encourage many to finally participate in an avalanche course. There is finally an avalanche education provider close to Boise.<br />
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<tr><td class="tr-caption" style="text-align: center;">Avalanche Science Course Line-up for March</td></tr>
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There are no excuses anymore such as that providers are too far away in Stanley and McCall. At the same time, the courses at Mores Creek Summit are very effective due to their small group size and availability of terrain less than 20 minutes from the Idaho City classroom.<br />
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I would like to take this opportunity to thanks the crew of IDT-Idaho City for their fabulous job in extending the pull-out at the Winter Corner location. This was a busy weekend and your job kept skiers safer and made driving easier for drivers using I-21!<br />
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<tr><td class="tr-caption" style="text-align: center;">Winter Corner Parking</td></tr>
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This is a great example of IDT being pro-active, and Stuart and his crew deserve a lot of credit. The conversations about winter recreation and parking needs before the snow came in are paying off! Furthermore, it was encouraging to notice that backcountry skiers are using the parking area in a manner that maximizes the pull-out parking capacity. Kudos to all!Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-33746766138250030512018-03-01T22:42:00.000-07:002018-03-01T23:00:07.679-07:00What Hatcher Pass, Soldier Mountain Yurt, and Winter Corner have in common?What Hatcher Pass in Alaska, Soldier Mountain Yurt by Fairfield, and Winter Corner - Mores Creek Summit have in common? After watching the next video you will be able to guess. Could it be POW?<br />
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Friday, February 23 through Sunday 25th we were surprised by new snow with 4-5% density at Soldier Mountain Yurt -Fairfield. The video included above is a small sample of the incredible skiing we had for 3 days. Last weekend BSU students enrolled in Avalanche and Snow Physics (GEOS 466-566) had their 3-day field camp at Soldier Mountain Yurt, next to Peak #1.<br />
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<tr><td class="tr-caption" style="text-align: center;">Soldier Mountain Yurt. Peak #1 in the background.</td></tr>
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Friday morning we loaded students into Soldier Mountain Ski Resort Box-cat and the scientific and personal gear into a second snowcat.<br />
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An hour later we were already surveying snow with various instruments. A 20-meter long trench was dug and each of the 12 students produced a snowpit hardness, temperature, and crystallography profile. A SMP penetrometer, Denoth moisture sensor, and NIR camera were used at each of the pits. Along the trench, a GPR radar was also used.<br />
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Late Friday we skied the 4-5 % powder, and expectations were high for Saturday since the forecast called for another 8-10 cms of new snow overnight.<br />
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Early Saturday three teams went into the field, by Peak #1.<br />
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<tr><td class="tr-caption" style="text-align: center;">Skinning up to Peak #1 summit.</td></tr>
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The goal was to execute simple snow surveying campaigns. Team #1 - Measure new snow SWE(snow water equivalent) across elevations and aspects, Team #2: Use NIR and IR to characterize snow stratigraphy, Team #3: Characterize Soft-Slab instability at Forest versus open meadows.<br />
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<tr><td class="tr-caption" style="text-align: center;">Near-Infrared and Infrared Snowpit</td></tr>
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Between skiing and doing science, we found time to warm-up!<br />
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Sunday was the last day of the field camp. And there were no assignments ... it was time to practice "safe" Avalanche Terrain travel.<br />
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The weekend before the BSU AValanche and Snow Physics course at Soldier Mountain, we found exceptional powder conditions at Hatcher-Alaska during an Alaska Avalanche School Level 2 course. Check the next series of pictures. The terrain is quite spectacular.</div>
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<tr><td class="tr-caption" style="text-align: center;">Forecasters digging a crown profile pit at the site of an avalanche.</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Picture from the Independence Mine Visitor Center - The lodge we stayed at.</td></tr>
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The Level 2 course in Alaska was a 4-day course that allowed us to have 4 days of touring and skiing.</div>
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<tr><td class="tr-caption" style="text-align: center;">$1000 Bowl - Day 3</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Day 4 - Ski touring over to Friendship Pass</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Alaska sun.</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Reducing avalanche exposure - we cut an uphill track in an area away from avalanche danger. Can you guess which one was ours?</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Level 2 students getting Obs.</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">The last day - Monday, we left evidence of a skiing at Friendship Pass</td></tr>
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The classroom facilities at the Indepence Mine Visitor Center were rustic and cozy.</div>
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YES, this is a posting with lots of pictures ... but pictures tell a story better than words.</div>
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After a little more than a week of traveling to Alaska, preparing and executing the BSU Avalanche and Snow Physics field camp I was looking forward having a personal day off. Monday I went ski touring to Mores Creek Summit with my son Pedro and a friend from Ketchum. Sunday night precipitated 25 cms of new snow in the top of last weekend's 25 cms ... a whopping half a meter of new snow. Trail breaking was arduous ... but the skiing was awesome.</div>
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Next a series of pictures from MCS last Monday.</div>
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Today I skied for 3 hours at Bogus Basin. It was really good skiing with 20 cms of new snow. For the careful observer, there was a weak layer under the new snow that released naturally at small steep slopes within Bogus boundaries. It is reasonable to assume that at Mores Creek Summit there is the potential of multiple buried weak layers. We can not ignore the present winds and the significant low-density snow available for wind transport. And there is more snow forecasted for tonite. In few words, in a week the snowpack is experiencing significant load event (greater than 70 cms up to now), and we should expect wind slabs, storm slabs, and buried persistent slabs. In fact, Sawtooth Avalanche Center issued today a HIGH avalanche danger for the Sawtooth Mountains.</div>
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Yesterday, the snowmobile trail groomer for the Boise Snowmobile club, Greg Davis, shared a video of fresh avalanche debris on Facebook's page for the Boise Snowmobile Club. The avalanche occurred at "Avalanche corner" (the first red bamboo sticks in the road) less than 2 miles from MOres Creek Summit parking lot along Pilot Peak road.</div>
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Tomorrow an Avalanche L1 course starts at Mores Creek Summit. I will make an effort to share obs Friday night. </div>
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Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-60399066299201075132018-02-11T06:54:00.000-07:002018-02-11T17:24:12.966-07:00Tour of Memories - Snow surface Conditions update.Yesterday I was delighted to tour MCS with Pedro. It has been a long while since the last time we glided on skis at the place where Pedro literally grew-up skinning and skiing. We have continued to ski tour in Colorado, but it is not the same when you are in the place where there are so many memories.<br />
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<tr><td class="tr-caption" style="text-align: center;">Pedro</td></tr>
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I still remember, when Pedro was 11, and he finally catches up with me at Freeman Peak, while I completed a quick snowpit, and he tells me "Papa, you got to ski down, Alan is in a big-big snowhole". It happens that my friend, new to the backcountry, had a binding failure, and had stepped out of the skis. The snow was bottomless and he sank to his waist and was utterly unable to get back on skis. I remember when some other time, I thought it was funny to dislodge a dry-loose slide of Diurnal NSF snow and bury Pedro to his chest ... and while I hysterically laughed, he just said ... 'very funny' with a sarcastic voice. So many memories. Some memories are reminders of life frailty, like when out of the blue, a large tree came down between me and my other son during a perfect pow day and zero wind.<br />
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At a relaxed pace, while we enjoyed each other company, we skinned along Pilot Peak road, all the way up to the Pilot Peak-Bear run intersection. As we climbed together we recalled the many ski days we have done throughout the years at MCS. We wondered about out of the ordinary events, such as the avalanche that buried a lucky solo-tourer that was digged out by two snowmobilers that happen to see the slide on an innocent looking south aspect slope below Pilot Peak road, or another slide where Pedro and I saw entry tracks without exit tracks and how we decided to enter threatening terrain to search for a possible victim. We also recalled memories from many powder days, long tours to the West Glades, and the enjoyment of taking friends to our steep and deep shots.<br />
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<tr><td class="tr-caption" style="text-align: center;">Snowmobilers at Pilot Peak road - February 10th 2018.</td></tr>
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The rain from last Sunday left its mark at all aspect and elevations. At lower elevations (6100-6600 feet), temperatures close to zero are favoring the formation of melt-freeze recrystallization "Near-surface" facets. At mid-elevations (6600-7600) there is a supportable crust, with random pockets of breakable crust. By the way, this breakable crust is very efficient in reminding you that you are NOT an expert skier at all - regardless of what you think - it has a striking ego destroying capacity. Higher elevations have a variable snow surface, with a mix of windblown pow, surface hoar, and near-surface crystals above a rain crust.<br />
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<tr><td class="tr-caption" style="text-align: center;">Snowmobile family at Pilot Peak Summit</td></tr>
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The day was cold, sunny, with moderate winds from the north. We only ran into a single backcountry skier, but there were plenty of snowmobilers and timber sleds touring the area. It helped a lot to have the Pilot Peak road groomed a few days ago by Greg Davis. The grooming on a very supportive layer of snow made it enjoyable for snowmobilers and skiers alike ... It was like skiing at a groomed run in a resort!<br />
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And ... of COURSE, we found great snow. That is why MCS is so special! If you try hard and never give up, there are ALWAYS pockets of amazing skiing at Mores Creek Summit. Check the video of Pedro enjoying sweet turns at Pilot Peak bowl, right below the Lookout.<br />
<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/255215720" webkitallowfullscreen="" width="640"></iframe> <a href="https://vimeo.com/255215720">PilotFeb10_2018</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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After the rain and freeze events, the snowpack at MCS has gone into a deep sleep state, with no evidence of reactivity. The buried surface-hoar and basal facets were not impacted directly by the rain, but the extended warm period and rain introduced an outstanding amount of kinetic energy that drove the snowpack to an unusually early isothermal state. This was a topic of discussion during last Wednesday GEOS466-566 Avalanche and Snow Physics course taught at BSU this semester. Students contrasted pit profiles (hardness and temperatures) for last Sunday versus 3 weeks ago.<br />
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Once we get new loads of snow it is unlikely that the winter "deep instabilities" can become reactive again, and attention should be placed into the myriad of NSF and surface hoar currently at the snow surface.<br />
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Meanwhile, advanced surface facets and windblown snow at higher elevations are providing a surface that is making skiing fun. After last weekend rain, it was comforting to the soul to ski dry snow ...Yipee!<br />
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<tr><td class="tr-caption" style="text-align: center;">Pilot Peak Bowl</td></tr>
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At the top of Pilot Peak, there is a BLM Weather station next to the lookout facilities. The precipitation bucket had a chunk of ice slammed into it. I carefully cleared the bucket. Do not attempt repeat what I did in the future since there are filters that need to be carefully relocated to guarantee its operation. PLEASE - PLEASE - PLEASE ... stay clear of the weather station!<br />
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<tr><td class="tr-caption" style="text-align: center;">Pilot Peak weather station. Data is available through Mesowest (University of Utah).</td></tr>
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This weather station is critical for backcountry users (skiers and snowmobilers. THIS IS SERIOUS! Myself as well as many others, make LIFE and DEATH decisions based on it. It provides essential temperature and wind data that we use to track avalanche potential and make terrain travel risk decisions. Links for this weather station can be found in the blog 's right side.<br />
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During this winter there have been periods when the station has not reported data. There seem to be times when the data is not being transmitted, others when the data is transmitted but does not make it to Mesowest site, but it is available through NOAA. I have not been successful in identifying the weather station contact person. I will greatly appreciate if a blog reader knows the person responsible for the weather station and might get that person in contact with me. I would like to assist in making this so important weather station more reliable during the winter.<br />
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I also want to express my appreciation for backcountry users due diligence in staying clear of the interval snow boards and depth stick at MCS pass. THANKS! The data is used to improve snow stability assessments.<br />
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<b><span style="color: red;">Winter is not over - and - Winter is coming. </span></b>You can finally learn about backcountry skiing at Mores Creek Summit, have somebody show you where to go skiing, all while you learn about avalanche rescue and/or safe touring in avalanche terrain. Check the course line-up for March 2018.<br />
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Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-30983552045818486752018-02-09T07:01:00.001-07:002018-02-09T07:17:20.080-07:00Commemorating 10 Years!<b><span style="color: blue;">It has been 10 years since the FIRST posting at this BLOG. In January 10, 2008 I wrote the unedited text included below.<br /><br /> It has not been easy to be consistent. But the blog has endured. There are 150 posts, each dedicated to share tips, information, and mostly, the joy I get from MCS.<br /><br /> I have skied and toured many places around the world. I have been numerous times to the Alps, Pyrenees, Andes Ranges. I have explored the mountain of Oregon, Nevada, Wyomimg, California, and Colorado. I love skiing in the Sawtooths, Boulders, Pioneers, Soldier, Salmon River Mountains in Idaho. But after 25 years, Mores Creek Summit is home.<br /><br /> Thanks Bondo, you were the first person to comment in the blog - you have been a great supporter! Thanks JT, Lanza, Biggs, Joel, Jim C., Eric S., James M., and many others. There is one other special person that deserves the most credit ... Pedro Rodriguez ... he kept steady the bearings of MCS blog, and his advise and encouragement have serve well our community of backcountry skiers/riders, snowshoers, and snowmobilers that relish and love Mores Creek Summit.</span></b><br />
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<a href="http://www.morescreeksummit.com/2008/01/greetings.html">First MCS Blog Posting</a><br />
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The creation of this blog is the result of conversations with John Taggart (Idaho-NSP Avalanche Educator) and Janet Kellam (Sun Valley Avalanche Forecaster and President of the American Avalanche Association) during the National Avalanche School - 2007. We felt that the Mores Creek Summit backcountry user community would greatly benefit from a forum where information about snow conditions can be shared.<br />
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The Mores Creek Summit is a popular winter recreation area with fabulous terrain and incredibly varied winter touring opportunities. It is indeed a precious gem. I had been skiing there for 15 years, and it is where my kids developed their backcountry skills while skiing at Freeman and Pilot Peaks. For this reason this area very special to me.<br />
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During the last few years the winter visitors to Mores Creek Summit has dramatically increase. Information about snow conditions was shared by word of mouth. But that is not adequate anymore, and it is my hope that this blog could serve as a tool to better share snow conditions, as well as allow for the local backcountry community to network, share snow stability assestments, and make friends.<br />
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I think it will be a good idea to start this blog by inquiring about potential names for the most popular ski runs. In the spirit of initiating the conversation I include below a topo map with names used by my sons, acquaintances and myself. I have NO idea how we will reach concensus - but we will figure it out together as we go forward.<br />
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The next posting (this weekend) will have the first snow assestment to be posted on this blog. Snow assestment for the early season is available - but the NEW snow from the 1/7 thru 1/11 - makes the pre-1/7 data less valuable. Let me know if there is interest on it and I will be more than happy to post it.<br />
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One final note: In order improve communications it is strongly suggested that we follow the guidelines and conventions from Snow, Weather, and Avalanches: Observational Guidelines for Avalanche Programs in the Unites States.<br />
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I recommend purchasing the document at: <a href="http://www.americanavalancheassociation.org/obs.html">http://www.americanavalancheassociation.org/obs.html</a> or printing it from the following link:<br />
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<a href="http://www.avalanche.org/~research/guidelines/">http://www.avalanche.org/~research/guidelines/</a><br />
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Furthermore, I will be sharing snow assestmant data based on the Snow Pit Technologies " Snow and Avalanche Field Book", also known as the BLUE book. The field notebook can be acquire at:<br />
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<a href="http://www.snowpit.com/products/products.htm">http://www.snowpit.com/products/products.htm</a> <br />
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ChagoChago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-90200651798426641312018-02-07T11:28:00.000-07:002018-02-07T11:28:07.211-07:00State of MCS Snowpack - February 7thHow to describe this most unusual winter? Twelve days ago, on a stormy and snowy Saturday, we were enjoying fantastic pow skiing.<br />
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<tr><td class="tr-caption" style="text-align: center;">Avalanche Science Level 1 course - Saturday, January 27th</td></tr>
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With the new snow, a warm front arrived at the area Saturday night. The next day, Sunday, January 28 dawned with warm snow on top of the cold snow. The wet new snow resulted in difficult skinning conditions with globs of dry cold snow sticking to the skins [I promised myself to never forget having glide wax, somehow my Chilean beeswax slipped out of my pack]. By Monday morning cooler temps resulted in a widespread thick crust at Mores Creek Summit. Last week temperatures have been mild, mostly at or above the freezing point. Check SNOTEL chart for temps and Snow Depth for MCS included below. These temperatures have contributed to the dramatic settlement and densification of the snowpack at all elevations.</div>
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<tr><td class="tr-caption" style="text-align: center;">MCS Snotel Data for the last 14 days</td></tr>
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Last Saturday we got lucky and rain skipped MCS. The skiing conditions were instructional - a hefty breakable crust that elicited thoughts about life and death at every turn. All in all, I had a great time with BSU students during a Geoscience Avalanche and Snow Physics field day at Pilot Peak. The students were able to compare Saturday's isothermal snowpack with the snowpack from January 13 when they last visited Mores Creek Summit area. The snowpack back then showed evidence of instabilities and was characterized by its cold content and temperature gradients that produced a gamut of facet crystals.</div>
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<tr><td class="tr-caption" style="text-align: center;">BSU GEOS466/566 (Avalanche and Snow Physics) Field Day - February 3rd.</td></tr>
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Not only did the GEOS466/566 class did awesome snow science, but they also successfully completed their multiple avalanche victim rescue simulations. In a few weeks, they will be participating in a multi-day science field camp at Soldier Mountain Yurt, where scientific instrumentation will be used to survey and characterize snow properties.</div>
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Last Sunday the weather was not generous. It rained most of the day at Mores Creek Summit! For a short time above 7400 feet, it precipitated snow, but it changed into rain later in the afternoon. But we put a good face and completed an Avalanche Science 1-day Avalanche Rescue course. And I was impressed by the few snowmobilers that ventured out in such conditions.<br />
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Sunday rain did not result in wet loose instabilities. The surface crust developed during the last two weeks enabled "lateral flow" of liquid water. Lateral flow is when liquid water instead of percolating through the snowpack flows "laterally", between layers within in the snowpack. Sunday's liquid water lateral flow inhibited the wetting of the snow within the snowpack and instead facilitated draining the liquid water into creeks. The bad news is that water is not stored in the snowpack, which is what water managers want - 😱.<br />
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The two concerning structures within MCS snowpack; buried layer of fused surface hoar and the deeply buried early season facet/crust did not show evidence of reactivity. It is likely that we might not have to worried about these layers anymore. And what we need next is MORE snow precipitation in the top of the existing snowpack. The coverage above 7000 feet is great, with lower levations still looking brushy.<br />
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-9rSvIQVUsdw/WnsT-j-6CcI/AAAAAAABBF0/WGOdwQ5SW0of7n17MI8ZOikSwBJ422UjgCKgBGAs/s1600/IMG_1083.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="1200" data-original-width="1600" height="300" src="https://1.bp.blogspot.com/-9rSvIQVUsdw/WnsT-j-6CcI/AAAAAAABBF0/WGOdwQ5SW0of7n17MI8ZOikSwBJ422UjgCKgBGAs/s400/IMG_1083.JPG" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Fused Surface Hoar Layer buried at MCS</td></tr>
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Moving into another most important topic ... I have been experimenting with various avalanche course formats. It is true that the current demotivating snow conditions do not compel us to seek avalanche education, resulting in low demand for avalanche education at MCS. The snow conditions at MCS above 7000 feet exceeds the depth from most locations in Utah and Colorado. During a professional course I was teaching in Utah, snow depths averaged 80 cm at 9000 feet.<br />
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<tr><td class="tr-caption" style="text-align: center;">Shallow snowpack during Bridge Course in Utah - 9000 feet, February 2.</td></tr>
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But it is unlikely that is the whole story, yes the courses seem expensive but I failed to explain the concept behind the $825-course fees - to provide the best avalanche education possible close to Boise!<br />
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The avalanche courses I am offering at MCS are priced higher in order to offer a more intimate learning environment and limit course sizes to six or fewer participants. The per student fee by AIARE, the AIARE providers fees, Idaho Outfitters and Guide Licence fees, USDA-USFA Special Use permit fees, Classroom at Idaho City Visitor's Center, and insurance are amortized with much fewer students. In addition, I packed two courses into one; an "AIARE Companion rescue" and "AIRE Level 1/2" that further increased course costs.<br />
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<tr><td class="tr-caption" style="text-align: center;">Avalanche Science Headquarter at Idaho City Visitor's Center</td></tr>
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Moving forward - Earlier this week I updated the line-up of Avalanche Science courses. All avalanche course fees were reduced.<br />
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2-Day Intro to Backcountry and Companion rescue: $400<br />3-Day Avalanche Level 1: $600<br />3-Day Avalanche Level 2: $650<br />1-Day Companion Rescue Course: $200</blockquote>
The number of participants for these courses continues to be limited to a maximum of six. I firmly believe this is essential to be able to provide the best possible avalanche courses in the USA and internationally. In addition, it is fundamental to have a lot of touring and skiing/riding time, particularly with the fabulous skiing available at MCS. The courses will continue to include the AAA certified Instructor certification as well as the AIARE Diploma.<br />
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<tr><td class="tr-caption" style="text-align: center;">AAA Certification</td></tr>
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In order to reduce Avalanche Science course fees, the Companion Rescue will not be bundled anymore with Level 1 or Level 2 courses. The science grade snow kit will not be included. Participants can purchase a snow kit during the courses.<br />
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At <a href="https://www.avyscience.com/collections/frontpage" target="_blank">Avalanche Science Courses at MCS</a>, you will find the line-up of courses for March. There is a new offering Boise folks have bee asking about; a 2-day weekend introduction course. This NEW course includes the AIARE Companion Rescue component.<br />
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There are two Avalanche Level courses dedicated to specific demographics. An AIARE Level 1 course for Women and another for Young Adults (18-24 year old). The AIARE Level 2 has been designed with the PRO1 progression in mind. This course will prepare you to pass the Bridge Course, that will convert this Level 2 into a PRO1 certification.<br />
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Friends, visit <a href="https://www.avyscience.com/">AVYSCIENCE.COM</a>. I will appreciate if you have any feedback, suggestion, or other courses you will like to see us provide to our community of winter backcountry recreationists.<br />
<br />Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-61652916650012110452018-01-23T23:30:00.002-07:002018-01-23T23:43:20.238-07:00Pilot, Sunset, Freeman Peak - Snowpack Update - January 23, 2018First the good news!<br />
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The snowpack is slowly building up. Above 7000 the snowpack depth exceeds 1 meter. Locations with some north component have as much as 1.5 meters in depth. Skiing continues to be pretty fun. Below Nico, a Chilean IFMGA guide enjoying Freeman skiing last Monday (January 22, 2018).<br />
<a href="https://4.bp.blogspot.com/-qtaroOjb7qQ/WmgUrBrDwaI/AAAAAAABAQ8/5_8QrL2SYX8DI_26osRwwRYzNVNVMpa2QCKgBGAs/s1600/2018-01-23-PHOTO-00000143.jpg"><br /></a>
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<span style="text-align: start;">The FIRST bad news - There was a rain event at all elevations in the Mores Creek Summit area </span>Sunday night<span style="text-align: start;">. The new 15-20 cms of new snow from Sunday night through Monday came down above a rain crust. This new layer will require some monitoring since it is likely to result in a melt-freeze facet recrystallization</span>.<br />
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The SECOND bad news. Last Saturday there was a timber sled avalanche release at Pilot Peak bowl. I was unable to get pictures and only have second-hand reports from a separate snowmobile group the observed the triggering of the slide. It is likely that the release occurred at a surface hoar (SH) layer. Coincidently the SH layer was identified last Saturday at a depth of 65 cm. This SH layer is now buried between at an 80-85 cm depth after the Sunday night storm. This layer was not observed at Freeman or Sunset, but it was present at a Pilot Peak snowpit above 7400 feet at a slope with an NE aspect.<br />
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The surface hoar layer somehow has been fused by a melt-freeze event to the slab and underlying surface. The fusing and preservation of SH is a rare event I have not witnessed before. This thin "fused" SH layer is an unpredictable layer that shows propagation potential with stubborn reactivity. It was identified during a propagation saw test (PST) of the 90 cm facet layer. Fracture initiation of the 90 cm layer simultaneously triggered a failure at the 65 cm SH weak layer 😱. The SH fracture plane is shown in the next figure.<br />
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Third bad news - it is likely that we still have to deal with another cycle of instability once the snowpack is re-loaded again. There are two weak layers that will require our attention, in addition to the slide paths that avalanched two weeks ago. The weak layers were left in place, and new snow was redeposited. These areas have the potential of becoming "repeat offenders" once the recent snow has time to metamorphose and develop a cohesive slab.<br />
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Changing gears - Last Sunday we completed a Silverton Avalanche School PRO1 brought to Mores Creek Summit by Avalanche Science. We had participants from Japan, Chile, Colorado, Washington State, Idaho, and Maine. The PRO1, a new American Avalanche Association professional course introduced this 2018 Winter was planned to be held at Soldier Mountain Ski Resort, but it has to be moved to Mores Creek Summit due to lack of snow.<br />
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We would like to take this opportunity to express our gratitude to the USFS-Idaho City District Range Office, Idaho City Library, and the Idaho City Chamber of Commerce. This PRO1 course would have not been possible without the support of those organizations.<br />
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Next a collection of pictures from the PRO1 course. Notice the cozy instructional facilities of Avalanche Science at its headquarters in the Idaho City visitor's center.<br />
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For those interested in Avalanche eduction at Mores Creek Summit, visit <a href="http://avyscience.com/">AVYSCIENCE.COM</a>. There are NOW two types of Avalanche Level 1 course offerings; "Premium" and "Regular" Avalanche level 1 courses. Check <a href="http://avyscience.com/">AVYSCIENCE.COM</a> for dates, prices, and what is included in each course.<br />
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There is a $50 discount on the course fees when donating more than $25 to the Payette Avalanche Center or for lodging at Idaho City during the course. Proof of donation/lodging is required to get the discount code. The discount code is redeemable at <a href="http://avyscience.com/">AVYSCIENCE.COM</a>.<br />
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Last weekend I noticed that some ham radio enthusiasts used the 146.460 MGHz for their communications while skiing at Mores Creek Summit. What a coincidence! That is a frequency I monitor and communicate with when backcountry skiing. I suggest backcountry skiers adopt this frequency for Mores Creek Summit communications. That will allow for communications not only during emergencies, but to also share observations, snowpack data, stability test results, and other relevant information.Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-73799772856288255232018-01-12T23:44:00.001-07:002018-01-14T14:28:02.008-07:00Avalanche Cycle at Pilot Peak (January 11-12)Yesterday we ski out of Pilot past 2:00 PM. Signs of instability were present, but a natural avalanche cycle had not started yet.<br />
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We left the trailhead close to 8 AM after a beacon check and a discussion about conditions. Our tour plan was conservative considering the unpredictability of the buried persistent layer. As we gained elevation we noticed that yesterday blower powder was now cohesive and slabby. And the whumpfs reminded us about the ability of the snowpack to propagate fractures, thus we carefully selected ski lines.<br />
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Later in the morning, once we reached steeper terrain above 7000 feet, we ran into several D1 and D2 avalanches at various elevations and aspects. Yesterday we skied past locations with avalanches. Apparently last night during an incursion of temps above the freezing level that was enough to finally tip the scales, and initiate an active natural avalanche cycle.<br />
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Pictures tell the story of the instability cycle at Mores Creek Summit Thursday night and Friday morning.<br />
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There were crowns with a thickness of up 90 to 100 cm at popular backcountry skiing runs such as Almost Top of the World, The knob. We counted six significant avalanches that released naturally at popular areas.<br />
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Throughout the day there was no lack of significant collapses (Whumpfs), and stability test confirmed that there is still an active weak layer buried between 90 to 100 cm with the potential of human-triggered slides at slopes that have not avalanched yet.<br />
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Another layer of concern is a 35 cm storm slab that also released at various locations. Stability tests failed at that layer with easy scores and Q1 fracture character (sudden planar).<br />
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Many of the slopes that were not steep enough to slide experienced striking fractures.<br />
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The skiing was fun, albeit the face shot quality pow from the day before was gone. Check the next video.<br />
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/250939022" webkitallowfullscreen="" width="640"></iframe> <a href="https://vimeo.com/250939022">PilotJan12_2018</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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The forecast for tomorrow is for a warming trend. In the long term, this will help with the present instability. meanwhile, it will be prudent for tomorrow not to ignore slope angles and be selective where to ski in the MCS backcountry.<br />
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Next a slide show with pictures showing releases and fractures at Summit Creek area.<br />
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/251067545" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/251067545">Pilot Jan 12 2018</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-45703564641274462542018-01-11T22:40:00.000-07:002018-01-11T22:40:00.638-07:00Nice Pow day Today at Pilot - January 11, 2018We left Boise early. Snowing intensity picking up as we approached Idaho City. By the time we arrived at Mores Creek Summit it was snowing at a rate of 2 cm/hr. At 6000 feet it is yet not looking like winter. But once you reach the 7000 it is a winter wonderland!<br />
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/250729398" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/250729398">PilotJan11_2018</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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By the time we were skiing there were 20 cms of new snow. Early in the afternoon, the storm snow reached the 30 cms.<br />
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The snowpack predictably was reactive after the new load. We observed numerous whumpfs. After checking the snowpack we suspect that the whumpfs were occurring at a new weak layer interface buried 45 cm below the snow surface. It is likely that this recent weak layer consists of a near facet layer form prior to last Friday's precipitation event when it developed the rain crust and it was subsequently covered by new snow. We do not know how widespread is this weak layer.<br />
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The Thanksgiving crust and facet weak layer is now buried 75 cm below the snow surface. The snowpit was done at 7400 feet, NE aspect, on a 22 slope angle. The Thanksgiving crust/facet weak layer was unreactive. At the snowpit, we did not find evidence of fracture propagation, but the Fracture Quality score of Q1 is concerning, particularly when considering the significant whumpfs we observed,<br />
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We will be providing another update prior to the weekend. The meager snow conditions at the pass might discourage skiers, but higher up there are good ridinconditionsns.<br />
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Notice that there are some NEW additions to the Mores Creek Summit Blog sidebar;<br />
<ol>
<li>Links are provided to facilitating getting the Avenza app for your mobile device. Another link is provided to download topo maps from Mores Creek Summit with slope shading. The Avenza and topo maps are free.</li>
<li>Another set of links are provided for the season snowpits.</li>
<li>The snow forecast generated by OpenSnow for Idaho is also available via a link.</li>
</ol>
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The next video was filmed last Saturday at Peak 9220 - Banner Summit.<br />
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/249999043" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/249999043">StabilityTests_Peak9220_Jan6_2017</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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This peak is located SE of Copper Mountain. Skiing was good. We experienced whumpfs. Stability testing produced moderate results and no evidence of propagation. However, Q1 (Sudden Collapses) scores at a 45 cm weak layer are of concern. We did not find wind slabs at 9220.</div>
Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-12192988404901533642018-01-03T16:59:00.001-07:002018-01-03T17:20:20.367-07:00Pilot and Sunset Peak - December 31 and January 2 UpdatesThe story for MCS continues to be the same;<br />
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<li>It is best to use the summer forest service roads to access Pilot or Sunset Peaks. The roads allow climbing above the 7000 feet in elevation. At that elevation, there is enough snow coverage to make skiing safe and keep the base of your boards healthy and scratch free.</li>
<li>The persistent slab problem is let's say "persistent". Stability tests and slopewise collapses (Whumpfs) continue unabated. Snow pits for December 25, 27, 31 and January 2 are remarkably similar. </li>
<li>With careful selection, there are northerly aspects that continue to provide fun skiing. Other aspects have a variable rain crust making skiing instructional.</li>
</ol>
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Below I included for illustrative purposes the snow pit profiles for December 25 at Pilot Peak and for Sunset Peak yesterday (January 2). With the exception of the surface crust developed last week and the densification of the top slab, both profiles are remarkably similar for two locations, particularly when the two snowpit locations are several miles apart and with somewhat different aspects. The first snow pit profile corresponds to Sunset Peak recorded yesterday, and the second to Pilot Peak last Christmas day.</div>
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The next video summarizes the propagation test results from January 2 at Sunset Peak. The ECT failed at 18 taps, while for the PST type of tests the fracture propagation was arrested after the slab fractured. The slab fracture for the PST and CPST (horizontal experimental test) at 60 cm after a critical saw cut of 25 and 23 cm respectively. </div>
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/249471303" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/249471303">SunsetJan2_2018</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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We also experienced a significant slopewise collapse at the same slope we conducted the stability test.<br />
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Next a picture of the lookout at Sunset Peak. My hope is that the picture motivates the reader to make a trip over to the lookout.<br />
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Yesterday we were delighted with Sunset Peak views. The next picture is from the Sunset Lookout looking Southeast. Steel Mountain, in the Eastern Boise Mountains, can be seen in the background.<br />
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The next picture looks west from Sunset Lookout. Freeman Peak covers most of the view. Freeman has two drainages facing East, and they cover a large area filled with fabulous skiing. To the South is the 12-mile creek drainage and to the North is Mores creek (north) drainage with Pilot Peak road north of it.<br />
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At the end of the day, we were rewarded by a phenomenal sunset after ski touring Sunset Peak! :)<br />
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Two days earlier we ski toured Pilot Peak and skied Almost Top of the World, the lookers right side of Top of The World (shady lower angle northeast aspect terrain), and the Whoop-um-up creek headwaters. It was disturbing to see so many rocks at Whoop-um-up creek headwaters. In 25 years I have never skied there with so little snow. Whoop-um-up creek headwaters is a steep area with a cornice and avalanche path hidden out of the way from skiers typical tours. If you choose to visit it, please treat its slopes with ample respect during periods of instability. The next video summarizes well my last tour of 2017!<br />
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/249276812" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/249276812">PilotPeakDec31_2017</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.</div>
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As an avalanche educator, I understand the challenges of trusting stability test results. The secret is in the doing. It is about getting used to completing two CTs, and ECT in less than 15 minutes (including digging). And it is about learning that stability tests are not the only piece of data - That way the pressure is off. When you are doing tests early in the season you are getting a fundamental understanding (and feeling) of how the snowpack evolves. Doing snow pits is like taking the "vital signs", it seems boring at first, you do it when the patient is not sick, but then, the value is when the vital signs change and you are able to recognize that something is "not right"!<br />
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And it gets easier to integrate weather, temps, wind, and precipitation to anticipate avalanche type and trigger likelihoods. And you will be surprised that as the winter progresses you are actually doing fewer stability tests and relying more on other observations. In the spirit of encouraging the blog readers to play (yes play) with snowpits, I include one more video with the stability tests performed last December 31st.<br />
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/249303213" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/249303213">StabilityTestsPilotDec31_2017</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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Finally - I wish to this blog reader, the most wonderful NEW YEAR!</div>
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Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-26605883114284203752017-12-30T23:05:00.002-07:002017-12-30T23:12:40.592-07:00The Knob (Pilot Peak) - Little new snow, a new rain crust layer, and Good Skiing!As we drove past Idaho City this morning it was raining. We became somewhat concerned. As we gained elevation rain continued. It finally transitioned into snow past the Freeman switchback (Mores Creek drainage), just 100 feet from Mores Creek Summit.<br />
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It was somewhat disappointing to realize that the Thursday and Friday night storms forecasted snow amounts, storm totaling 20 cms of snow precipitation, did not materialize. Above 7000 feet and at locations minimally impacted by the moderate winds, there were as much as 3 cms of new snow. In other more windward locations, the sheer glare of the rain crust was very visible.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhxDXMPKSLtYUxXlfiYOxRjNzP2o3FSptq_8r31rkWM1IBphXpxTQMzmBF7ZmEpo6no9NAV7fEPoNwn69xhKD0t-osm7CvmEilMxug_1USVB7y_UU-8Twxv-Ip1QhXfOnpGTuzFjzedlMdm/s1600/IMG_1536.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1200" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhxDXMPKSLtYUxXlfiYOxRjNzP2o3FSptq_8r31rkWM1IBphXpxTQMzmBF7ZmEpo6no9NAV7fEPoNwn69xhKD0t-osm7CvmEilMxug_1USVB7y_UU-8Twxv-Ip1QhXfOnpGTuzFjzedlMdm/s400/IMG_1536.JPG" width="300" /></a></div>
At all elevations and aspects, under a thin layer of Friday morning snow, a thin rain crust layer was present. At elevations below 6500 feet, the crust became started to impact the quality skiing.<br />
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During the last two visits, the snowpits were located 10 meters below ridge tops. Today's snowpit was located 100 meters from the top. The structure was similar and the only remarkable difference was that the weak layer was only 3 cm thick, quite thinner from the 9-10 cms thickens at below the ridge tops at Summit Creek Glades and Almost Top of the World.<br />
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The pit profile is included next;<br />
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Stability test results are similar to the December 25 and December 27 stability tests. The next video shows the compression, extended column, and cross-propagation saw, and regular propagation saw tests.<br />
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/249210334?loop=1" webkitallowfullscreen="" width="640"></iframe> <a href="https://vimeo.com/249210334">KnobDec30_2017</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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In the video, you will notice that we continue to play with the experimental horizontal PST, also called "cross" PST or CPST. Today stability test results continue to be consistent with the stability tests conducted during December 25 and 27th. In addition, the PST for the three days (December 25, 27, 30) arrest the fracture propagation after the slab fractures. I am uncertain of why this was observed again today. The warm temps and rain have greatly increased the strength of the slab. Reviewing the pit picture of snowpit reveals that the slab hardness goes from Fist at the top to 4-F at its bottom.<br />
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I did not observe surface cracks today, but ominous whumpfs were still frequent. These whumpfs are consistent with the stability test results. Based on this test results we avoided slopes above 35 degrees and used an inclinometer to verify slope angles.<br />
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The skiing was surprisingly fun. When skiing, as we lost elevation elevations the crust transitioned into a thicker crust. This crust, depending on aspect, had the potential of increasing the instructional level of skiing. But we selected ski lines with NNE aspects as well as protection from the wind. We suspect that the protection from the wind minimized the amount of liquid water reaching the snow surface from a light rain event last night.<br />
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The sky partially cleared late in the morning and we were rewarded by wonderful views of the Boise, Sawtooths, and Trinity Mountains. Check the next sequence of photos. Can you recognize Copper Mountain at Banner Summit?<br />
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Friends continue to ask me about coverage. If you use Pilot Peak road, you can skin to above 7000 feet to reach the Upper Summit Creek Glades, The knob, Almost Top of the World, and Top of the World. The coverage of the North and East aspects is adequate. You just need NOT get carried away and drop into the Summit Creek drainage below 6400 feet.<br />
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Check the next two pictures. The top picture was snapped from the Knob, looking north into "Top of The World", and the second picture is looking south into the upper Summit Glades. These pictures should give you an idea of the coverage above the 7000 feet level.<br />
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Yes ... it is not ideal the shallow snowpack we are skiing at MCS. We are 50% off from the average depth for this time of year.<br />
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Yes, we need to be conservative with the fracture propagation propensity of the snowpack. Persistent slabs are unpredictable.<br />
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Yes, we need to carefully select ski lines to avoid deadfall that can hurt us. Use existing Forest Service roads to get to higher elevations and avoid skiing shallow areas below 6500 feet, where your skis can get snagged.<br />
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But it is not a bad idea to go out and train your body for the skinning required by the powder days coming soon. Besides, it is a great idea for those that have taken avalanche courses to practice stability tests and experience first-hand how an unstable snowpack behaves during testing.<br />
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Happy New Year!Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-35109317059794509092017-12-29T19:05:00.000-07:002017-12-29T19:55:14.550-07:00Ski Tour Planning for MCS - What resources should I use before skiing tomorrow?Today I was pleased to see the use of the term 'Situational Awareness" in a Facebook posting by the US National Weather Service-Boise. There has been a lot of conversations during the last few years about decision making in Avalanche terrain, as well as the importance of trip planning. However, we have been slow integrating situational awareness (SA) into decision making. SA has been important to big wave surfers as well as sailors. I grew up doing both. In order to survive and enjoy the power of waves and the ocean (in a surfboard or sailboat), we where disciplined (maybe obsessed!) about perceiving, understanding, and anticipating nature.<br />
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So how do we use SA for planning a ski tour at Mores Creek Summit? First, let's examine the perception of the environment. The avalanche environment is the combination of snowpack, weather, and terrain, as well as our touring companions when in the mountains. We will discuss each one.<br />
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Check the forecasts for the Payette Avalanche Center and/or Sawtooth Avalanche Centers. If you have been doing that for a week or so, you might have noticed a discussion about the development of a "persistent slab" avalanche problem this winter in Central Idaho.<br />
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How a persitent lab is formed? As the precipitation snow sinters and settles (densifies), the slabs progressively becomes more cohesive. Wind or terrain with shallower angle intensifies the slab formation. The Christmas snow has now become a slab and it buried an old snow surface. The old snow surface was transformed into facets during clear weather. The facets become a weak layer once buried by a slab. This weak layer consists of persistent crystals. They are persistent because it takes a long time compared to new snow to round and form bonds (sinter) within its crystals.<br />
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Facet crystals due to their highly hexagonal crystalline structure and lower surface area per volume take longer to transition into rounds and sinter. By recalling the Southern Idaho weather trend (tranquil and dry with snow in the ground) and the latest new snow that had enough time to develop a slab, we should suspect that we might have a "persistent slab" problem type. And that is confirmed by the Avalanche Forecast Centers in their latest forecast products. In addition, there is data from friends and others (like this blog) that have documented the presence of persistent slabs in some areas.<br />
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We have identified one of the avalanche problems "type" of the day, a <b>Persistent Slab</b> Problem. Check this resource to become familiar with the various avalanche problems:<br />
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<a href="http://avalanche.state.co.us/forecasts/help/avalanche-problems/">http://avalanche.state.co.us/forecasts/help/avalanche-problems/</a><br />
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If we intend to ski at Mores Creek Summit tomorrow, the avalanche problem type defines the snowpack we will be traveling and skiing on. We discussed meteorological factors that resulted in the Persistent Slab problem type present today at MCS. But we also need to consider how the weather conditions will impact the snowpack now and during the hours prior to our tour. There are two elements for the weather "environment"; what is going on right now, and what will happen tomorrow.<br />
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For present conditions, I suggest <a href="http://mesowest.utah.edu/">mesowest.utah.edu</a> where you can select all weather stations within a certain area or radius. The interface looks like this when you also select the radar layer:<br />
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If you zoom into MCS area you get two stations; one at the top of Pilot Peak and another at the MCS snotel.<br />
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<a href="http://3.bp.blogspot.com/-D3fWEyubopA/WkbKL7rL93I/AAAAAAAA_RM/Ke0uMOkXo1UwPB8DB6fQdvQnJiwSX021gCK4BGAYYCw/s1600/Screen%2BShot%2B2017-12-29%2Bat%2B4.04.04%2BPM.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="258" src="https://3.bp.blogspot.com/-D3fWEyubopA/WkbKL7rL93I/AAAAAAAA_RM/Ke0uMOkXo1UwPB8DB6fQdvQnJiwSX021gCK4BGAYYCw/s400/Screen%2BShot%2B2017-12-29%2Bat%2B4.04.04%2BPM.png" width="400" /></a></div>
Clicking on the stations (for this case Pilot Peak Summit) a graph pops up with Temperature and Relative Humidity. You can also select wind and solar output charts.<br />
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The chart is important because it shows that temps at the top of Pilot Peak have been between -3 and -1 Deg C during the last 24 hours. These temps would have resulted in further development and strengthening of the persistent slab at MCS.<br />
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From the same Mesowest menu you can access the wind data:<br />
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<a href="http://1.bp.blogspot.com/-6G3FfbCs734/WkbMPKmQd0I/AAAAAAAA_Rg/hzJRcd49DxMf2SIfNJezS4rWrltali49gCK4BGAYYCw/s1600/Screen%2BShot%2B2017-12-29%2Bat%2B4.13.15%2BPM.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="345" src="https://1.bp.blogspot.com/-6G3FfbCs734/WkbMPKmQd0I/AAAAAAAA_Rg/hzJRcd49DxMf2SIfNJezS4rWrltali49gCK4BGAYYCw/s400/Screen%2BShot%2B2017-12-29%2Bat%2B4.13.15%2BPM.png" width="400" /></a></div>
The wind speed is increasing as the storm approaches. The wind direction at the top of Pilot Peak is from the SWW. The wind speeds are moderate, and two days ago there was snow available for wind transport, thus it is possible that localized wind slabs might form near the top of Pilot Peak. This is a second avalanche problem type so far identified.<br />
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If you click on the Snotel station you get temps above the freezing point for the last 24 hours. Thus it is possible that a crust might have developed at the snow surface prior to the new snow precipitation event. Or perhaps, there will be an interface between precipitation events. Can this result in a shallow storm slab problem between the Thursday and Friday precipitation events?<br />
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The Snotel stations are managed by the Natural Resources Conservation Service. An interactive map can be accessed at <a href="https://www.wcc.nrcs.usda.gov/webmap">https://www.wcc.nrcs.usda.gov/webmap</a>. Depending on what parameters you choose it might look like the shown below. I like to display the snow depth variable.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg3gGYhugUijbx4M9chPi6ibLlr3LMXum65E_5E4dyB0SR5azEG5V_wEG_lLMCAfnqQXH7awpYd1cPOaeEHoHdXHIs4nw6PFuejBwxztcBiNwFIPl9yOHnNxQoaG5TQSolXhKPD9Nqn9pRe/s1600/Screen+Shot+2017-12-29+at+4.30.28+PM.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="257" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg3gGYhugUijbx4M9chPi6ibLlr3LMXum65E_5E4dyB0SR5azEG5V_wEG_lLMCAfnqQXH7awpYd1cPOaeEHoHdXHIs4nw6PFuejBwxztcBiNwFIPl9yOHnNxQoaG5TQSolXhKPD9Nqn9pRe/s400/Screen+Shot+2017-12-29+at+4.30.28+PM.png" width="400" /></a></div>
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Move the cursor over the Snotel stations and select MCS station. By clicking on the station you can get into a 30-day or 7-day report. Or you can create a custom report, just like the one shared below.</div>
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<a href="http://3.bp.blogspot.com/-izdHNX3XkFc/WkbPMhnsYSI/AAAAAAAA_R4/nZsw8fZEENsXYII96zZ8OHcU4If2QMm8wCK4BGAYYCw/s1600/Screen%2BShot%2B2017-12-29%2Bat%2B4.26.11%2BPM.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="258" src="https://3.bp.blogspot.com/-izdHNX3XkFc/WkbPMhnsYSI/AAAAAAAA_R4/nZsw8fZEENsXYII96zZ8OHcU4If2QMm8wCK4BGAYYCw/s400/Screen%2BShot%2B2017-12-29%2Bat%2B4.26.11%2BPM.png" width="400" /></a></div>
You can scroll the mouse pointer into the precipitation data points. For the above chart, there was an increase in snow depth from 61 to 71 cm. In summary, during Thursday night, 10 cms of new snow precipitated at 6100 feet (elevation of MCS Snotel). Temps at 6100 feet have been above the freezing level favoring slab densification and a possible development of a crust, factors to consider when another precipitation event will deposit additonal snow. On the other hand, Temps at Pilot Peak summit have been below the freezing point and in combination the SW wind it is reasonable to expect the formation of wind-slabs as well as the transport of snow in some areas (cornice formation at the top bowl or other ridges above 7500 feet).<br />
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Next we want to know what the weather will do tomorrow. There are many resources at your disposal, but I recommend for starters this one: <a href="http://www.weather.gov/">http://www.weather.gov/</a> click into Western Idaho, and follow up with another click in a smaller map over to the NE of Idaho City, above the "d" letter in Idaho City. Use the topo map window to refine the forecast for the area of interest (for our case Pilot Peak Summit). Proceed to click the "Hourly Weather Forecast" below the map window.<br />
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This forecast is for tomorrow and corresponds to the general area of Pilot Peak Summit. The precipitation forecats predicts ~9 cm of overnight snow with a slight cooling trend. The temperature forecast shows a coling trend during the day. The sky cover forecast is for the sky to open up before noon. Winds are forecasted to be low-moderate from the NE.<br />
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There are other weather resources, ... a truckload of them, and too many to list here. I recommend always to read the forecast discussion from NWS-NOAA and browse this site; <a href="http://opensnow.com/dailysnow/idaho">http://opensnow.com/dailysnow/idaho</a><br />
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WOW, in what it might take you less than 30 minutes by yourself, we demostrated how to improve SA by reviewing snowpack and weather resources. These resources allows us lean about the current Avalanche Environment at MCS. Let's make sure consider the MOST relevant data;<br />
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<li>A possible total of 20 cms of NEW snow precipitating in a reactive snowpack with a "persistent slab" problem type. How the risk of triggering avalanches and consequences are impacted by new snow in top of an unstable snowpack?</li>
<li>Colder snow above warmer slow - this good for skiing conditions!</li>
<li>Thursday snow might have a surface crust at lower elevations (~ below 7000 feet) separating the new snow predicted for tonite (Friday night). Is it possible to find a shallow storm slab problem tomorrow at MCS?</li>
<li>Moderate winds from SW shifting to NW. New snow available for transport. Where can we find wind slabs?</li>
<li>The total snowpack at MCS Snotel by tomorrow might reach tomorrow 80 cm, well below average. Snow coverage at lower elevations slightly improving, but what are the risk of underbrush and deadfall?</li>
<li>Visibility improving with partly sunny conditions by mid-morning. An invigorating sense of happiness with a crystalline white landscape, new snow, great skiing, and sunny weather. Is it possible to deviate from a good plan due to "feel good blue ski day"?</li>
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It is not possible to cover in this posting how to develop a plan based on the above Perception of the Environment. It requires an understanding of the Avalanche Triangle (Weather, snowpack, Terrain). That understanding will enable to anticipate, a key component during the development of ski touring plans. Consider an avalanche class or refresher, where it is covered snow metamorphism and avalanche release mechanisms. Remeber that it is now possible to participate in avalanche courses at MCS! Visit <a href="http://skipilots.com/">SKIPILOTS.COM</a> or <a href="http://avyscience.com/">AVYSCIENCE.COM</a> for the various avalanche educational offerings.</div>
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This posting was a realistic exercise to show how much we can learn from the "avalanche" environment with online resources and tools available at smartphones We got started by asking - How we can improve situational awareness? We briefly explored the weather and snowpack for MCS. Your homework is to integrate what we learned into the MCS terrain. In other words - define where to safely travel and ski, and map it. Foremost the planning is completed when you have identified, with a map at hand (or in the smartphone/tablet/PC) where NOT to travel and ski tomorrow!</div>
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A big component of Situational Awareness is becoming familiar with the terrain characteristics such as; aspect, elevation, slope angles, wind loading areas, wind protected areas, open/heavy timber areas, terrain traps, snow-covered forest service roads, creeks, among other terrain features. The maps for MCS are available on this blog and are provided with slope angle coloring. The topo maps for Mores Creek Summit area are based on 10 meter resolution DEM source.</div>
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<a href="https://1.bp.blogspot.com/-ykCCAr3B-Ao/WFmgaGRLRMI/AAAAAAAAyTg/9FESe-OZ3f4kZ3C5JsE9jH33TUbI7UYKgCPcBGAYYCw/s1600/MCSPilotPeakEast.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1237" height="400" src="https://1.bp.blogspot.com/-ykCCAr3B-Ao/WFmgaGRLRMI/AAAAAAAAyTg/9FESe-OZ3f4kZ3C5JsE9jH33TUbI7UYKgCPcBGAYYCw/s400/MCSPilotPeakEast.png" width="308" /></a></div>
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I have been recommending to load Avenza into your smartphones. The application allows you to draw tracks. For example, use the drawing function to denote your uphill track, as well as creating segments representing lines you intend to ski. In the field, you can compare planned versus actual track/segments. And more importantly, while in the field, if you deviate from your plan you can clearly improve your situational awareness by identifying avalanche terrain based on the map slope angles.</div>
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Get the Avenza app and maps at <a href="https://www.avenzamaps.com/">https://www.avenzamaps.com/</a></div>
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You can load the free Mores Creek Summit area topo maps with shaded angles into your smartphones, tablets, or PCs at the link included below:</div>
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<a href="https://www.avenzamaps.com/vendor/2685/avalanche-science-llc" target="_blank">Avalanche Science Georeferenced Maps at Avenza Store</a></div>
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<a href="http://2.bp.blogspot.com/-IPioFJ6telM/WkbkvkGbJFI/AAAAAAAA_S8/tWJpLkDWAUY_gC7z7N7pNTlW3qq2BdFEgCK4BGAYYCw/s1600/Screen%2BShot%2B2017-12-28%2Bat%2B7.23.06%2BPM.png" imageanchor="1"><img border="0" height="245" src="https://2.bp.blogspot.com/-IPioFJ6telM/WkbkvkGbJFI/AAAAAAAA_S8/tWJpLkDWAUY_gC7z7N7pNTlW3qq2BdFEgCK4BGAYYCw/s400/Screen%2BShot%2B2017-12-28%2Bat%2B7.23.06%2BPM.png" width="400" /></a></div>
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I intend to add other maps from Idaho to this database as my discretionary time allows. There are other terrain mapping apps for smartphones that work very well and that I also use (such as GAIA). The intent here is to make sure that the MCS backcountry community has access to the basic tools necessary to integrate SA into ski touring.</div>
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An aspect we did not cover here is the Social Environment. Tha HUMAN element is key in the formulation of a plan. I will do that in a future posting. Touring/riding skills, avalanche terrain travel experience, attitude, health, gender, risk acceptance, and personality can interact positively or destructively during development and execution of a SAFE ski touring plan.</div>
Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-68273471702521247702017-12-27T23:40:00.004-07:002017-12-28T09:27:24.260-07:00Almost Top of the World - Snowpack AssestmentYou know the snowpack must be treated with respect when whumpf (collapses) are widespread. But then, when skinning through small terrain features (safe areas) and small releases are triggered, it becomes poignantly clear that the snowpack has a weak structure prone to fracture propagation.<br />
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<a href="https://1.bp.blogspot.com/-EVvgMZz3Kew/WkR43s-X2nI/AAAAAAAA_K8/fpQSfP8ZpUkAbnV-eLoY4CYcwLAKyMPdACKgBGAs/s1600/IMG_1507.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="960" data-original-width="1280" height="300" src="https://1.bp.blogspot.com/-EVvgMZz3Kew/WkR43s-X2nI/AAAAAAAA_K8/fpQSfP8ZpUkAbnV-eLoY4CYcwLAKyMPdACKgBGAs/s400/IMG_1507.jpg" width="400" /></a></div>
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I was surprised when climbing up to Pilot Peak I triggered multiple collapses at south aspects above 7200 feet. I was NOT expecting that south aspects will have a weak structure.<br />
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The next videos show the compression, extended column compression test, and an experimental horizontal saw test.<br />
<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/248930611?autoplay=1&loop=1" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/248930611">CTM_12_27_2017</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/248931662?autoplay=1&loop=1" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/248931662">ECTP_Dec27_2017</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/248932571?autoplay=1&loop=1" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/248932571">H_PST_Dec27_2017</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
Both compression tests failed at moderate scores and provided further evidence of fracture propagation propensity, in addition to collapses and cracks observed today.<br />
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The last few days I have been carefully observing test results for various stability tests. Two days ago and today, the Propagation Saw Test (PST) fracture was arrested after the slab broke, as it can be seen in the two pictures included below.<br />
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<a href="https://1.bp.blogspot.com/-9DKsK0P_EyI/WkR7lWfhk0I/AAAAAAAA_LQ/E6is75cVWbEp96jfLziEWipOxCnbHRL1QCKgBGAs/s1600/IMG_1501.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="960" data-original-width="1280" height="300" src="https://1.bp.blogspot.com/-9DKsK0P_EyI/WkR7lWfhk0I/AAAAAAAA_LQ/E6is75cVWbEp96jfLziEWipOxCnbHRL1QCKgBGAs/s400/IMG_1501.jpg" width="400" /></a></div>
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I do not think it is an issue related to slab stiffness or aspect ratio, the bending moments resulting from the propagating wave are sufficient to mechanically disturb the slab and break it. I tried different aspect ratios and widths with no success. Besides, avalanche researchers have documented that the PST can be unreliable with thin slabs.<br />
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The snowpit profile changed very little from two days ago.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYCixg51YJ8OrOX-xGWQjHsROchrX7h0JFVuY-K8JHvfLKG-QwC12jxlrXuVI9BUhVpaoaVlVhVcX_MAGHvMj5RkNlixFJRVbpkhNBP8Zr-_uiFL99tekcdRjaYbR1ByoY8kCvpvezhAZY/s1600/Almost+Top+of+World-27-Dec.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="840" data-original-width="994" height="540" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYCixg51YJ8OrOX-xGWQjHsROchrX7h0JFVuY-K8JHvfLKG-QwC12jxlrXuVI9BUhVpaoaVlVhVcX_MAGHvMj5RkNlixFJRVbpkhNBP8Zr-_uiFL99tekcdRjaYbR1ByoY8kCvpvezhAZY/s640/Almost+Top+of+World-27-Dec.png" width="640" /></a></div>
Notice that today I measured crystal sizes. I was unimpressed with the facet lack of striations, and irregular crystal sizes and shapes of the facets. However, I noticed significant facet chains. As I drove back to Boise I kept thinking how to document that attribute, and I have an idea I will test in a day or two.<br />
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The temperature gradient at the weak layer interface in the snow pit profile is not strong. It is unlikely that at this time there is any significant active facet metamorphism at the weak layer interface. Today's snow pit, just like the one two days ago has a thin ice crust, that can be easily missed.<br />
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With regard to the snowpit data - One trick I use to make easier recording snowpit data is to take a picture with the hardness marked at the snowpit side walls. Check the fist, 4-fingers, and 1-finger indentations in the next picture:<br />
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The skiing was fun today, but the snow has densified compared to two days ago.<br />
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/248982667?loop=1" webkitallowfullscreen="" width="640"></iframe> <br />
<a href="https://vimeo.com/248982667">AlmostTopWorldDec27_2017</a> from <a href="https://vimeo.com/avalanchementor">Santiago Rodriguez</a> on <a href="https://vimeo.com/">Vimeo</a>.<br />
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Snow settlement is driven by the effect of gravity on the snow - its weight causes densification. Sintering metamorphism is responsible for the building of bonds between snow crystals. Snow settlement and sintering inevitably result in the development of a slab. And there is a weak layer with facets in excess of 2 mm in size under the slab. We call this avalanche problem a "Persistent Slab" problem. The term persistent refers to the temporal durability of the facets undermining the slab.<br />
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Meanwhile, there is a winter weather advisory for Thursday night through Friday with a potential of up to 20 cm or more of new snow. The snowpack structure at MCS is a concern, thus it will be important to apply conservative decision making during the upcoming weekend. An important practice during periods of instability is to be aware of slope steepness. There are two tools that make easier to travel safely; a topo map with slope steepness and a clinometer to measure slope angles.<br />
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During the last posting (Christmas day), I encouraged blog readers to install on their phones the free Avenza application. Also, you need to use the Avenza app to download into your smart-phone the maps for Pilot, Freeman, Sunset, Wilson peaks. These maps are available at the Avenza map store for free. I uploaded to Avenza database several georeferenced pdf maps with colored slope angles for MCS area as well as Copper Mountain - Banner Summit. Below an example of the application with today's (blue track) as well as December 25 tour (yellow track) tour.<br />
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Notice that red denotes terrain steeper than 35 degrees, and that must be considered avalanche terrain. This solution replaces a printed topo map, and it is a fantastic safe travel tool - Why? - It will display where you are relative to steep terrain.<br />
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But we also need to measure slope angle in the actual terrain. It is not possible for maps to capture small terrain variations that result in avalanche exposure. I suggest that you purchase a phone app named "Avalanche Inclinometer". It is only a few bucks, it is the best app out there, and it works. I have compared the app it to a forestry (accurate) clinometer and it compares very well.<br />
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There are various phones apps for slope angle measurement. But the one recommended here has a feature that makes it the best solution. You basically sight the angle through the phone long axis side and a simulated voice dictates the angle. You can use your finger to tap the screen to lock the slope angle measurement if you do not want to use the voice option. I have not seen any other inclinometer app that locks the clinometer after sighting. That feature is a MOST. The color of the screen reflects the if the angles correspond to avalanche terrain danger (Red = High, Orange = Moderate, Green = Low).<br />
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My day finished on a high note. On my way down I met some very nice folks snowshoeing at Pilot Peak. It is terrific to see other users enjoying travel in snow!<br />
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Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-45914632121304817312017-12-26T08:04:00.004-07:002017-12-26T15:47:09.327-07:00Christmas Day 2017 - Good Pow and Unstable SnowpackThis is not an average snow year, at least so far. Even without perusing into the NRCS-Snotel reports for Mores Creek Summit we are behind snow amounts this winter. Throughout the years I developed a rule-of-thumb to start backcountry skiing at MCS when there was more than a meter of snow at the MCS Snotel. I broke the rule yesterday, with a reported snow depth of 66 cm at MCS snotel.<br />
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Skiing was fun above 7000 feet, with a somewhat unconsolidated snowpack at spots. Turns were sweet with fast pow skiing conditions.<br />
<iframe allowfullscreen="" frameborder="0" height="564" mozallowfullscreen="" src="https://player.vimeo.com/video/248738550" webkitallowfullscreen="" width="640"></iframe> Below 7000 feet you had to pay attention to what might be lurking below the snow surface. I was very careful and still one of my skis managed to get snag when it got caught in deadfall but it fortunately easily released. Be careful, the snow cover is shallow below 7000 feet, and last year's Pioneer fire left a lot of fallen burnt trees.<br />
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What about the snowpack? The snowpack was definately unstable. This was not a surprise considering the extended dry conditions during December that allowed near surface facets to develop.<br />
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It was easy to find evidence of instability. There were multiple crown fractures from avalanches released during the last storm, and plenty of surface cracking with whumpfs. Quick "hand-compression" either failed during isolation or easy collapses when tapping the column.<br />
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The depth of the instability varied from 20 to 30 cm from the snow surface to the interface between the new snow and a well-developed facet layer. At the interface, between the new snow and facets, there was a fragile crust layer - which is definitely not good!<br />
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At ~7200 feet in elevation a snowpit with NE aspect and 28° slope angle was 63 cm deep (HS). The new snow layer was fist hard with a layer thickness of 21 cms. There was a thin crust layer between the new snow and facet layer insterface. The facet layer under the crust was 9-10 cm thick. Below the facet layer there was a 25 cm thick pencil hard layer of rounds. Fracture failures were ocurring at the top of the facet layer, right at the crust to facet interface.<br />
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You can access the snowpit profile at: <a href="https://snowpilot.org/node/4733" target="_blank">https://snowpilot.org/node/4733</a><br />
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<a href="https://2.bp.blogspot.com/-hy7gkQxrqsQ/WkJ1WexSA0I/AAAAAAAA_FY/HNllEXK5KjUIK-R9gc9X2IwcZo_SBccTwCKgBGAs/s1600/Summit%2BCreek%2BGlades-25-Dec.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="840" data-original-width="994" height="337" src="https://2.bp.blogspot.com/-hy7gkQxrqsQ/WkJ1WexSA0I/AAAAAAAA_FY/HNllEXK5KjUIK-R9gc9X2IwcZo_SBccTwCKgBGAs/s400/Summit%2BCreek%2BGlades-25-Dec.png" width="400" /></a></div>
I recommend using saving SnowPilot website and database to generate and save your snowpit profiles. SnowPilot web based application is free and it is based on AAA SWAG standards. Sharing your snowpit and avalanche observations you will advance Snow Science since the data is used for research, while at the same time you are refining your snow, avalanche, and weather standarized nomenclature.<br />
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Extended columns stability test failed consistently with easy scores. Check the next two links for short videos of the extended column stability tests:<br />
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<a href="https://www.instagram.com/p/BdJn9qZFwO9/" target="_blank">Compression Extended Column Test</a><br />
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<a href="https://www.instagram.com/p/BdJnEMXlwHk/" target="_blank">Extended Saw Column Test</a><br />
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The snowpack at MCS has a persistent slab structure. This instability will be with us for a while. The faceted layer is well developed with a thickness of up to 10 cm. As the new snow sinters and further develops into rounds, the reactivity of this avalanche problem will decrease. Be mindful of the existing snowpack weak structure at MCS, this a rare event, and it has been more than 30 years since MCS had experienced such a low SWE water year. Since this is a rare event, we do not have experience with this conditions at MCS. At the same time, persistent slab conditions tend to be unpredictable and easily propagate across distances, significantly raising the consequences when caught in an avalanche at slopes with terrain traps. And the bad news is that MCS has many terrain traps, plenty of steep creek bottoms and fun treed terrain that will become a nightmare if caught in a slide.<br />
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The coverage is still poor as you will see in the pictures included below. Let's keep the fingers crossed for the next storm arriving tonite. The forecast is not too encouraging with respect to precipitation amounts, but surprises do happen.<br />
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<a href="https://1.bp.blogspot.com/-1TQtjyZsZY4/WkJeFlPnEEI/AAAAAAAA_EM/ckRSj4OEEXUC4EvFH8lGDSKquq6RWcx7wCKgBGAs/s1600/orig.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="300" src="https://1.bp.blogspot.com/-1TQtjyZsZY4/WkJeFlPnEEI/AAAAAAAA_EM/ckRSj4OEEXUC4EvFH8lGDSKquq6RWcx7wCKgBGAs/s400/orig.jpg" width="400" /></a></div>
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For those interested in downloading into their phones topo maps with "colored" slope angles, you will find in Avenza a collection of FREE maps I made available for MCS where you can overlay your track while touring. It is a nice tool to get an idea of slope angles while touring or skiing.<br />
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Below a sample of the Avenza application screen. Avenza is a FREE smartphone application where I am providing FREE georefenced maps for popular backcountry skiing destinations in Idaho.<br />
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<a href="https://4.bp.blogspot.com/-bQEraengcmE/WkJf674HRdI/AAAAAAAA_EY/qKZr4wq5kNYYbvpMHO0OiIaD2lDz-dv4ACKgBGAs/s1600/IMG_1081.PNG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1136" data-original-width="640" height="640" src="https://4.bp.blogspot.com/-bQEraengcmE/WkJf674HRdI/AAAAAAAA_EY/qKZr4wq5kNYYbvpMHO0OiIaD2lDz-dv4ACKgBGAs/s640/IMG_1081.PNG" width="360" /></a></div>
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You will find at AVENZA MAP Store, topo maps with colored slopes angles for Pilot, Freeman, Wilson, and Sunset Peaks. There is also a "colored" slope topo map for Copper Mountain at Banner Summit.<br />
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<a href="https://www.avenzamaps.com/" target="_blank">https://www.avenzamaps.com/</a><br />
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Finally, I wil be uploading into GAIA tracks from tours at MCS.<br />
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With the GAIA tracks you will find pics of snowpits, instability signs, or other relevant information. Check the track for yesterday's short tour at:<br />
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<a href="https://www.gaiagps.com/public/WImPluhW2kwYHRmkLXrqXdub/#?slideshow=true" target="_blank">Gaia Track for Summit Creek Tour - Christmas Day 2017</a><br />
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These two GPS tracking apps (GAIA and Avenza) are good tools that further improve terrain situational awareness.Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-88798497065525098092017-11-22T22:59:00.002-07:002017-11-22T23:29:27.782-07:00AIARE Courses with Chago - author of MCS blog<div class="separator" style="clear: both; text-align: left;">
The snowpack continues to build up at higher elevations with average snow depths near 50 cm at most mountain passes. Meanwhile, many of us are getting our gear ready for the upcoming winter, and anticipating another winter filled with powder days!</div>
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Late November is a great time to plan for avalanche education. The newest AIARE avalanche course provider in Idaho is Avalanche Science. AIARE Level 1 and Level 2 courses will be taught for the very first time at Mores Creek Summit in the Boise Mountains. Now you can take an avalanche course near Boise and kiss goodnight your kids at your Boise home after an avalanche course field day! Besides, backcountry skiers will be able to learn about avalanche and snow science while skiing the best lines at Pilot and Freeman Peaks.</div>
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Do not wait long to sign up. These courses are designed for very small groups and space is limited. We already have full bookings for some of the dates that are not advertised in the above image. In addition we have an innovative format where the AIARE Level 1 course also includes the AIARE Rescue course, all in three days. Starting this winter, the AIARE Rescue course is a pre-requsite for AIARE L2 courses.</div>
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Not only these courses are small in size and enjoy an intimate student to instructor ratio, but participants get with the course scientific grade digital thermometer, snow crystal observation magnifier, lexan crystal card, and a weather-proof field book. Participants will also enjoy newly developed online educational content.</div>
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Check SKIPILOTS.COM or AVYSCIENCE.COM for other offerings, such as the Exploring Mores Creek Summit at a very attractive first year introductory rate. There are other avalanche educational tracks such as avalanche skills refreshers, PRO1 preparation course, as well as other programs at International venues in the Andes and the Pyrenees.</div>
<br />Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-60258898899704806812017-11-01T15:24:00.000-06:002017-11-01T15:50:10.133-06:00Avalanche Education at Mores Creek SummitWinter is rapidly approaching. It is that time when we become anxious waiting for snow. It is also that time when some of us revisit the final days of last season!<br />
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<a href="https://3.bp.blogspot.com/-GC8w5SS-R6k/Wfo2aqQFMEI/AAAAAAAA9Oc/eN7Uw6OAnY47cEExubaDWo3x4uJCbh4nwCKgBGAs/s1600/DSC00969.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="739" data-original-width="1108" height="266" src="https://3.bp.blogspot.com/-GC8w5SS-R6k/Wfo2aqQFMEI/AAAAAAAA9Oc/eN7Uw6OAnY47cEExubaDWo3x4uJCbh4nwCKgBGAs/s400/DSC00969.JPG" width="400" /></a></div>
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<span style="font-size: x-small;">Bountiful 2017 winter - Copper Mountain - Banner Summit on May</span></div>
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<span style="font-size: x-small;">Somewhere in Banner Summit last May 2017</span></div>
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<span style="text-align: left;">It is also that time of year when the Mores Creek Summit blog is prep for the upcoming season. You might notice changes to the Mores Creek Summit blog appearance, in particular to the "resources" sidebar. There are a number of links that provide valuable information to backcountry skiers venturing into Idaho's Winterland that were not obvious to some in lasts years format. This year format makes the resources links more accessible.</span></div>
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<a href="http://4.bp.blogspot.com/-vejjTbsqdqI/WfoondWKOiI/AAAAAAAA9OQ/0gtYyQ7-t5o_VY6wyLIRf-QOZXZ5GT5DQCK4BGAYYCw/s1600/Screen%2BShot%2B2017-11-01%2Bat%2B2.03.24%2BPM.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" class="" height="640" src="https://4.bp.blogspot.com/-vejjTbsqdqI/WfoondWKOiI/AAAAAAAA9OQ/0gtYyQ7-t5o_VY6wyLIRf-QOZXZ5GT5DQCK4BGAYYCw/s640/Screen%2BShot%2B2017-11-01%2Bat%2B2.03.24%2BPM.png" width="211" /></a></div>
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Now - THE BIG ANNOUNCEMENT!</div>
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Avalanche Education is coming to Mores Creek Summit. Avalanche Science LLC will be offering avalanche courses after obtaining a "Special Use Permit" from the USFS as well as an Outfitter and Guiding license from the State of Idaho. </div>
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For details about avalanche courses at Mores Creek Summit visit:</div>
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<b><span style="font-size: large;"><a href="https://skipilots.com/" target="_blank">skipilots.com</a></span></b></div>
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This website is named after Pilot Peak, the highest peak at Mores Creek Summit. At this website, you will find avalanche course dates for the 2018 Winter. Avalanche Science is encouraging group reservations for these courses, which should not be difficult considering that the number of participants is capped at six. These courses are designed as a full three-day skiing experience, which is maximized with a small class size. </div>
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Having Mores Creek Summit become a venue for avalanche education is exciting at many levels. These NEW courses make avalanche education accessible to many since it takes a short drive, roughly 50 miles from Boise, to access Mores Creek Summit backcountry skiing trailheads. In other words - for some, it will be now possible to sleep at their Boise home when participating in an avalanche class. For others, flying from Seattle, Portland, or San Francisco, will be able to enjoy Boise amenities while completing their avalanche certification during a leisure weekend. Furthermore, all course participants will be able to sample and enjoy some of the best powder skiing the wild mountains of Idaho has to offer.</div>
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Avalanche Level 1 and Level 2 courses at Mores Creek Summit will exceed the new re-enacted American Avalanche Association (AAA) requirements. Each course will also include the new AAA rescue module at no additional cost. Certification from AAA Certified Instructor as well as AIARE will be provided to course participants.</div>
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Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-33626006164946606742017-03-05T10:00:00.002-07:002017-03-05T10:00:42.024-07:00Bogus Sidecountry - South Fork of Macks CreekIt has been a while since I have skied Bogus Basin side country. This past Wednesday I accessed the side country terrain below Paradise cat track (or more commonly known as the Triangle) through Mores Mountain backcountry gate. Technically this terrain can be considered part of South Fork of Macks Creek, to the east of Mores Mountain. It should be noted that the snow coverage was terrific. I arrived at the gate past 4 PM, thus I was limited how much I could ski tour. The skiing was fun with 20-25 cms of soft snow in a burly crust. It was important to be gentle and keep the speed to avoid the crust underneath the skis.<br />
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Saturday, I returned to the South Fork of Macks Creek. This time I had more time to do five laps. Just 3 meters after leaving the Mores Mountain gate, a wind affected roll over provided a reminder of the touchy nature of wind slabs. Fortunately, I was heading to terrain that was not impacted by snow.<br />
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When skiing down into Macks creek to access the terrain below Bogus's Paradise cat track it is vital to use good navigation skills and prudence. The bottom gully is steep, but it provides safe crossings without exposing a party to terrain traps.</div>
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<tr><td class="tr-caption" style="text-align: center;">Mack's Creek Steep Gully - a classic terrain trap!</td></tr>
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After crossing the south fork of Mack's Creek the rest piece of cake. Build an efficient uphill track that will facilitate skiing the three open meadows. Be mindful that the bottom of the ski runs steepen significantly, and put you right into unforgiving avalanche terrain traps. Do not allow to be lured into them!</div>
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Skiing this area is very scenic, and because of its lower elevation and nearby topography is protected from winds. In other words, pow is well preserved! Below several pictures from yesterday tour.</div>
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<a href="https://2.bp.blogspot.com/-5aG1-o6LmTk/WLuq7HYVLUI/AAAAAAAAzz8/ea775V-8IrMXw_IFq_Lv2gujw0KnNeR5wCPcB/s1600/IMG_7942.JPG" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="300" src="https://2.bp.blogspot.com/-5aG1-o6LmTk/WLuq7HYVLUI/AAAAAAAAzz8/ea775V-8IrMXw_IFq_Lv2gujw0KnNeR5wCPcB/s400/IMG_7942.JPG" width="400" /></a></div>
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One of my sons likes to call this area Shangri-la. And yesterday I was reminded why!</div>
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A quick look at the snowpit provided insights about the snowpack development during the last few weeks. Often, when I am alone instead of transcribing data I take pictures of important aspects. Below an example.</div>
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Notice on the first two pictures the hardness test results marked on the side wall of the pit. The snowpack was 235 cm deep, but I only excavated until the early February thick rain crust layer 67 cms below the snow surface. The last two pictures document the angle and aspect of the snowpit; 36 degrees in steepness and 3-4 degrees True North (no declination).</div>
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Stability test are summarized next;</div>
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<ul>
<li>ECTP5 at 45 cm, between two crusts.</li>
<li>CTEQ1(SP) at 25 cms, new snow.</li>
<li>CTMQ1(SC) at 45 cms, facets sandwiched between two crusts.</li>
<li>PST20/100(SF).</li>
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Basically, these tests suggest the presence of propagation potential at 45 cm. The question is where in the terrain this failure can become easy to trigger. Although the Extended Column failed as a sudden collapse, the Propagation Saw test was arrested at 40 cm when the slab fractured. It is possible that the slab is not yet cohesive enough to sustain propagation. But warm temps yesterday might have provided the necessary ingredient to form isolated slabs that could surprise us.</div>
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<tr><td class="tr-caption" style="text-align: center;">Evidence od snowpack warming</td></tr>
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The new snow instability is present at ridgetops and/or wind affected areas, where a slab is formed by wind and make it possible to propagate a failure, as seen in the video provided early in the post.</div>
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For about an hour fog moved in. This was an opportunity to enjoy magical moments with hidden treeed gullies. Very fun skiing indeed.</div>
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Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.comtag:blogger.com,1999:blog-4732271253984741275.post-72350414976355474382017-02-04T22:28:00.002-07:002017-02-04T22:29:22.796-07:00Freeman February 4, 2017It has been more than a week since the last posting on Mores Creek Summit blog. This past week I was giving all my attention to my Geophysics-Snow Science P.hD. Qualifying Examinations, which lasted four days. Of course, I had to spend countless hours preparing for this critical milestone between December 2016 and January 2017.<br />
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Today it was an interesting day. The day started when we arrived at Mores Creek Summit pass, and the road was blocked by snowmobilers trying to park. The parking area was not cleared of snow. We turned around and went back to Freeman Peak parking pull-out. The pull-out has not been plowed. We promptly dug a spot with our snow shovels in order to get our vehicle off the road.<br />
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We left on skins right from the vehicle. Only one lane of the road has been plowed by 8 AM, thus we used the snowy road lane to start skinning up to Freeman switchback and into Mores Creek drainage.<br />
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Air temps were above freezing level, and it was precipitating a mix of snow and rain when we started to skin up to Freeman. Above 6500 feet the precipitation was all snow. However, there was enough rain to get us pretty wet. The skiing was entertaining, but it had all the attribute of a maritime snowpack snow precipitation event. The next video provides an idea of the riding conditions.<br />
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<iframe allowfullscreen="" frameborder="0" height="360" mozallowfullscreen="" src="https://player.vimeo.com/video/202589598" webkitallowfullscreen="" width="640"></iframe>
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We did not observe at Freeman's lower ridge any slab releases, but during our second run we triggered a nice whumpf at the rain/snow level. At 7000 feet a quick snow pit revealed a reactive layer buried below 40 cms with sudden collapse character (Q1). The fracture plane was located below a crust undermined by a thin layer of facets.<br />
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The new snow, about 20 cms deep, had a graupel weak layer. The new snow reacted at the graupel interface as a soft slab when we tested small steep slopes. There was another crust present beneath the new snow/graupel but it did not show any reactivity.<br />
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Due to the temps above zero, the new snow was becoming inverted (higher density at the surface, lighter density underneath.<br />
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The warm storms (free liquid water), significant loading of the snowpack with new dense (heavy) snow, the presence of weak layers below crusts, deeply buried surface hoar (>60 cm), and shallow buried graupel have created a complicated snowpack that deserves respect. We observed today surface cracks and whumpfing. That is how nature telegraph to us that there was a slab failure. However, we did not have the steepness to make the slab slide.<br />
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The good news is that warm temps will assist with the sintering of facets layer, and depress the gradients responsible for the formation of facets. Meanwhile, ski tourers have to carefully select safe terrain for uphill travel and avoid steep terrain until the snowpack becomes less reactive.Chago Rodriguezhttp://www.blogger.com/profile/13979503258853394164noreply@blogger.com