Bridger Range

Cornice triggered natural avalanche, Saddle Peak

Date
Activity
Skiing

Cornice broke in between north and south saddle peaks.  The initial propagation width was hard to distinguish.  Maybe 50 feet.  About 18 inches deep at height of crown.  
 

Skied down Rocky Rib and then into south east facing trees that follow the path.  At the Argentina/ Shushmans traverse elevation there was a visible 2 foot wall and the slide had continued over the roll below.

 

Region
Bridger Range
Location (from list)
Saddle Peak

Small storm slabs Bridger Ridge

Wolverine Bowl
Bridger Range
Code
SS-N-R1-D1.5
Elevation
8000
Aspect
E
Latitude
45.83010
Longitude
-110.93400
Notes

3 small storm slabs observed on steep terrain of Bridger Ridge (E aspect observed from wolverine woods) Attached is a photo of the deepest likely ~12in crown

No observed wind slab development below 8100ft. No propagating test results in pits dug Lower ramp, and wolverine woods.

Number of slides
3
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
1
D size
1.5
Problem Type
Storm Slab
Slab Thickness
12.0 inches
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

Natural storm slabs northern Bridgers

The Throne
Bridger Range
Code
R2-D2-S
Elevation
8500
Aspect
E
Latitude
45.88220
Longitude
-110.95200
Notes

From IG: 3 separate natural slides viewed south of the throne today. All east facing. This was the biggest. 
If this is R3 others were more R2

Number of slides
3
Number caught
0
Number buried
0
R size
2
D size
2
Bed Surface
S - Avalanche released within new snow
Problem Type
Storm Slab
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

Natural storm slabs northern Bridgers

Date

From IG: 3 separate natural slides viewed south of the throne today. All east facing. This was the biggest. 
If this is R3 others were more R2

Region
Bridger Range
Location (from list)
The Throne
Observer Name
Isaac Freeland

Intentionally Triggered Avalanche on Ramp

The Ramp
Bridger Range
Code
SS-ASc-S
Latitude
45.82880
Longitude
-110.93100
Notes

While skiing a SE-facing slope, we found cracking and some cohesion in the new snow. This was mostly on very steep and rocky terrain features. The most notable of these was about 20’ wide, the bottom part of the new slab only moved about 6” before stopping, while the upper foot of the slab ran the full face. 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
Trigger Modifier
c-A controlled or intentional release by the indicated trigger
Bed Surface
S - Avalanche released within new snow
Problem Type
Storm Slab
Slab Thickness
12.0 inches
Slab Width
20.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Storm snow instabilities

The Ramp
Bridger Range
Code
SS-N-R2-D2-S
Latitude
45.82880
Longitude
-110.93100
Notes

Most steep chutes we skinned near had a debris pile at the bottom (running full path). 

Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
2
D size
2
Bed Surface
S - Avalanche released within new snow
Problem Type
Storm Slab
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year