21-22

Stamp Meadows/Sawtell Area

Date
Activity
Snowmobiling

We parked at Sawtell Parking area on Friday. We rode into Whit Elephant Canyon, Tyler Creek, and the ridge between Stamp Meadows Trail and Yale Creek. We dug 2-3' a west facing pit in White Elephant Canyon at 6,000 ft. elevation 50/50 open area with some shading. This pit was solid consolidated snow to the dirt and not any noticeable solar affect, and no faceted snow at the ground. We got no results on the ECT and had to pry the block out. On the Tyler Creek pit again 2-3' we were at 6,500 on a north facing slope in heavy tree cover. At ground level we had 3 to 4" of faceted snow. It we extremely obvious. This pit we got initiation, in the 25 hit area, no ECTP. The thing that stood out for us as I was teaching a new IDPR Educator was the significant difference at ground level with the faceting snow, just in the change of aspect. For the ridge pit above Sawtell Road we were at 7,100 ft., on a south east open facing slope around 3.5'. We had about 1cm to 1.5cm think solar crust developing. You could only hold about a 10" pie pc together before it broke. Not much strength in the solar crust. Under that pretty consolidated snow and minimal faceting at ground level. This pit also initiated at 25 hits but no ECTP results. 

We took our class on Saturday to the Tyler Creek pit since it had layering with that 3-4" of faceted snow. Again we manipulated this pit as hard as we could to try and get propagation by tricks Dave Zinn had showed me but we could not get past just initiation. 

Region
Island Park
Location (from list)
Yale Creek
Observer Name
Brian DiLenge

GNFAC Avalanche Forecast for Mon Feb 14, 2022

Snowpack and Avalanche Discussion

<p>It is possible to trigger avalanches 1-2 feet deep in the mountains around Cooke City. Avalanches this weekend indicate that buried weak layers of facets and feathery surface hoar aren’t to be fully trusted. Saturday, riders triggered an avalanche that broke 2’ deep and 30’ wide on a north-facing slope and a group saw a skier-triggered slide north of Silver Gate (<a href="https://mtavalanche.com/node/25847"><strong>Silver Gate photo and details</strong></a>). On Friday, a cornice collapse triggered a slope just south of Cooke City (<a href="https://mtavalanche.com/node/25840"><strong>Wyoming Creek photo and details</strong></a>). Significant wind-loading late last week added stress to the snowpack and slopes with recent drifts are more likely to be unstable. Evaluate the snowpack and terrain carefully and turn around if you observe cracking, collapsing or recent avalanches. Finally, get your shovel in the snow to test the upper few feet of the snowpack before committing to avalanche terrain. The danger is MODERATE.</p>

<p>While conditions are generally safe in mountains around Bozeman, Big Sky and West Yellowstone, Doug mentioned yesterday that “it is not a turn your brain off type of low danger.” Isolated areas of instability exist due to buried weak layers and small drifts of snow. Yesterday, Doug and his partner skied into the wilderness area in the Taylor Fork. They got an unstable test result on a buried weak layer that caused them to change their minds about skiing in avalanche terrain (<a href="https://www.youtube.com/watch?v=5MFatr0c108"><strong>video</strong></a&…;). He still felt like triggering an avalanche would be unlikely, but the risk wasn’t worth it for them. Getting this information is why we dig and test the snowpack. On Saturday, Alex saw a recent avalanche on Cedar Mountain on a wind-loaded slope during a ride at Buck Ridge (<a href="https://www.youtube.com/watch?v=kRjBQLrFjFk&amp;list=PLXu5151nmAvT1nrM2…;, <a href="https://www.mtavalanche.com/images/22/small-cornice-fall-cedar-mtn"><st…;).</p>

<p>Yesterday, small, wet snow avalanches occurred on isolated slopes in the Bridger Range. These are less likely today with increasing cloud cover but worth having on your radar if skies are clear and sunny during the heat of the day (<a href="https://www.mtavalanche.com/images/22/small-loose-wet-avalanche-hyalite…;).</p>

<p>Follow standard avalanche safety protocols, watch for unstable snow on isolated terrain features and remember that small slides are dangerous when combined with terrain traps. The avalanche danger is rated LOW.</p>

<p>If you get out, please send us your observations no matter how brief. You can submit them via our <a href="https://www.mtavalanche.com/node/add/snow_observation"><strong>website<…;, email (<a href="mailto:mtavalanche@gmail.com"><strong>mtavalanche@gmail.com</strong></a…;), phone (406-587-6984), or Instagram (#gnfacobs).</p>

Upcoming Education Opportunities

See our education calendar for an up-to-date list of all local classes. Here are a few select upcoming

February 19, Women’s only Companion Rescue Clinic sponsored in partnership with SheJumps! Register Here.

Ramshorn - Tobacco Roots

Date
Activity
Skiing

Today we checked out the Ramshorn Peak basin in the Tobacco Roots. We skied a northeast aspect on the southern ridge of Ramshorn and found isolated pockets of wind loading, and an ECT revealed an ECTN 16 @ 20cm (HS 145cm). A couple of hand pits collected on this aspect suggest that this windslab has the potential to move (Q2 shears with easy to moderate difficulty) with new snow or sustained warmer temps. The warmer temps were noticeably effecting the snow at lower elevations and direct south aspects. We observed small pinwheels increase throughout the day on southern aspects, and noticed a large cornice failure on the southeast face of Ramshorn. We found a small and protected wind drift on a southern aspect and, with relative ease, kicked off the cornice (photo). 

Region
Dillon Area
Location (from list)
Tobacco Root Mountains
Observer Name
Erich Schreier

Beehive, Blackmore

Date

Out the last couple days with AAI Rec 2. Variable snow surfaces before this next snowfall. SE, S, W are getting cooked up to 10,000 feet, especially after today. Primarily scoured or nsf everywhere else. Mostly ECTX due to no slab present in most locations, but found a 60cm pencil hard slab at 9800 ft today on N aspect on Blackmore, ECTP 19. We did not ski the line. Weak snow was present throughout the snowpack everywhere we dug.

Observer Name
Sam H