Bridger Range

Wind Slabs in Frazier Basin

Date
Activity
Skiing

Winds in the Frazier Basin zone were stronger than expected with moderate to strong gusts at the ridge, increasing through the day. 
 

Light flurries <S1 through the morning increasing to S1 by the time of our exit. Tough to gauge accumulation due to the wind but would guess 2-3cm total through the day. New snow from yesterday and today is generally not well bonded to the underlying surfaces which range from windboard, supportable crusts, and old wind slabs depending on aspect/wind exposure, and this made for challenging uphill travel at times. 
 

We noticed two large windslab pockets that had released since yesterday’s snow. One at the base of Hardscrabble Peak on a N aspect, the other in one of the SE facing gullies that access the Peak 9299/Hollywood Headwall ridge (see photo). 

Region
Bridger Range
Location (from list)
Frazier Basin
Observer Name
Jordan Rogers

Texas Meadows

Date
Activity
Skiing

Toured into Texas Meadows this morning. No avalanche activity seen, no cracking or collapsing. Northern aspects and higher elevations holding better snow, without a wind or sun crust.

Region
Bridger Range
Location (from list)
Texas Meadow
Observer Name
C. Robinson

Windy windy windy

Date
Activity
Skiing

Rode into Fairy Lake and skinned up the east shoulder of Naya Nuki. Winds went from strong to extreme out of the south in the early afternoon and were absolutely hammering. Despite the crazy winds, there was really no snow left to transport, so there was no active windloading. Wind surfaces were highly variable, from sastrugi to windboard to meltfreeze crusts to protected powder in the trees.

Saw no signs of instability or recent slab avalanches. We did see a good bit of wet loose activity that likely happened a couple days ago.

Region
Bridger Range
Location (from list)
Fairy Lake
Observer Name
Ian Hoyer

Bridgers

Date
Activity
Skiing

Toured onto the west side into Jones Creek and then down Wolverine Bowl. Found lots of crusty snow, wind scoured snow, hard wind drifts, and even some warm, dry powder. No near surface facets which is a good thing for future stabilty.

 

 

Region
Bridger Range
Location (from list)
Wolverine Bowl
Observer Name
Staples

Skier triggered Wind Slab Avalanches in Frazier Basin

Frazier Basin
Bridger Range
Code
SS-AS-R2-D1.5-S
Elevation
7500
Aspect
NE
Latitude
45.92780
Longitude
-110.96200
Notes

From obs: "Skier triggered wind slab on Northeast slope at 7,450 feet elevation. One skier was caught and carried roughly 10 feet before the slide came to a stop."

We also received reports from another group (IG story video) that triggered a couple similar sized wind slab avalanches in north facing chutes in Frazier Basin.

 

Number of slides
3
Number caught
1
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
R size
2
D size
1.5
Bed Surface
S - Avalanche released within new snow
Problem Type
Wind Slab
Slab Thickness
8.0 inches
Vertical Fall
100ft
Slab Width
20.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year