20-21

Skier triggered large slide on Saddle Peak

Saddle Peak
Bridger Range
Code
HS-AS-R2-D2.5-O
Elevation
9000
Aspect
NE
Latitude
45.79430
Longitude
-110.93600
Notes

On January 1, 2021 at approximately 1530 a skier triggered an avalanche on Saddle Peak south of Bridger Bowl. He left from the ski area around 1445 and skin up the ridge out of bounds to the south. Shortly after, patrol witnessed the avalanche and then later saw the solo skier returning to the ski area after descending the bebed surfacef the avalanche. The skier reported the event to patrol when he returned. He stomped at the rollover below the summit, on the south end of the low angle ridge, and it broke 3 ft deep....ran down north central and the main face.

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Skier
R size
2
D size
2.5
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
36.0 inches
Vertical Fall
1500ft
Slab Width
350.00ft
Weak Layer Grain type
Faceted Crystals
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

GNFAC Avalanche Forecast for Fri Jan 1, 2021

Snowpack and Avalanche Discussion

<p>While the Bridger Range and Lionhead area are a two hour drive apart, you’ll find similar conditions in the two areas today. These areas saw the most snowfall out of this last storm (5-6”) and in the case of the Bridgers, also the strongest winds (with gusts of 40 mph). This combination, on top of a weak lower snowpack, has created unstable conditions and avalanches will be easily triggered today on wind-loaded slopes. With increased winds overnight in the Bridger Range, expect to find newly formed and thicker wind drifts today.&nbsp;</p>

<p>Unfortunately, the snowpack is bringing 2020’s problems into the new year. The weak snow at the ground has shown it can’t handle a load. Each time we’ve gotten even a small snowfall we’ve seen signs of instability, either avalanches or dramatic “whumpfs” and collapsing of the snowpack (<a href="https://www.youtube.com/watch?v=rWeNgK6_PTs&amp;list=PLXu5151nmAvQDzKmH…;). Expect the same today. If you get onto a steep windloaded slope, you are likely to trigger a slide. Avoid steep windloaded slopes and carefully assess all other steep slopes.</p>

<p>The avalanche danger is CONSIDERABLE on windloaded slopes today and MODERATE on all other slopes.&nbsp;</p>

<p>&nbsp;</p>

<p>The Madison and Gallatin Ranges have the same weak snowpack, just with a slightly smaller load of new snow. Triggering an avalanche on weak snow near the ground is a very real possibility. Stay on alert for bullseye signs of instability - recent avalanches, collapses, or shooting cracks. If you don’t see these clear signs, dig a snowpit and keep searching for instability (<a href="https://www.youtube.com/watch?v=Gk8W8nlUMpw"><strong><u>video</u></stro…;). We’ve seen avalanches even with small loading events this year and just can’t trust this snowpack (<a href="https://www.youtube.com/watch?v=7jzopnikTNE"><strong><u>video</u></stro…;

<p>Human triggered avalanches are possible and the avalanche danger is MODERATE.</p>

<p>You are unlikely to trigger an avalanche today near Cooke City. However, if you get unlucky and find just the wrong spot you could still trigger a slide. On Wednesday morning, a snowmobiler triggered a slide on Crown Butte that ran 400 vertical feet and piled up debris that was easily deep enough to bury someone (<a href="https://youtu.be/UEY5A4YXibg"><strong><u>video</u></strong></a&gt;). This is a good reminder to always be prepared and carry rescue gear so you’re ready to respond if something goes wrong. The avalanche danger is LOW today.</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><u>websi…;, email (<a href="mailto:mtavalanche@gmail.com"><strong><u>mtavalanche@gmail.com</u></str…;), phone (406-587-6984), or Instagram (#gnfacobs).</p>

Upcoming Avalanche Education and Events

See our education calendar for an up to date list of all local classes. Here are a few select upcoming events and opportunities to check out: