21-22

Fairy Lake in the Sacajawea bowl

Date
Activity
Skiing

Dug a snow pit at 8,280ft adjacent to a chute. It was NW aspect. We found a ~35cm 1 finger windslab sitting on top of a ~25cm knife hard slab. We got ICT 12 on the first slab and ICT 15 on the deeper slab. On the ECT, we got a slight fracture at 15 taps and a full fracture at 17 (ECTP+2). This layer seemed to be on all aspects we looked at above tree line on NW faces. Bellow treeline, the snowpack was shallower and seem to lack these slabs.

Region
Bridger Range
Location (from list)
Fairy Lake
Observer Name
Jackson Krause

Natural wind slabs on Scotch Bonnet

Scotch Bonnet
Cooke City
Code
SS-N-R0-D1.5-I
Elevation
9900
Aspect
SE
Latitude
45.05660
Longitude
-109.95100
Notes

From email 11/10: "noted two small cornice triggered slab avalanches on a SEerly aspect of Scotch Bonnet Mountain. They looked to be fresh this morning, involve just new snow, and were about 25' wide each."

Number of slides
2
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
0
D size
1.5
Bed Surface
I - Interface between new and old snow
Problem Type
Wind-Drifted Snow
Slab Width
25.00ft
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year
21-22

Natural on Saddle Peak

Saddle Peak
Bridger Range
Code
SS-N-R1-D2
Elevation
9000
Aspect
NE
Latitude
45.79430
Longitude
-110.93600
Notes

From obs. 11/10:  "Fitness skinning around Bridger Bowl yesterday and noticed a fairly large, new avalanche on the east face of the North peak of Saddle. Maybe 100 feet below the ridge, about 100 wide at the crown, ran thru the rock bands but not over the cliff. Was taken back by the clean propagation." -Albert

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
1
D size
2
Problem Type
Wind-Drifted Snow
Vertical Fall
1100ft
Slab Width
100.00ft
Images
Natural avalanche on Saddle Peak
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
21-22

From e-mail 11/10/21: "an east aspect around 9900'.  HS 63cms.  ECTV on facets at 19cms." In this snowpit the slab collapsed above the weak layer when the observer isolated the column to perform an extended column test (ECT), hence the score ECTV (ECT-very easily collapsed and propagated). Photo: B. Fredlund

 


Forecast link: GNFAC Avalanche Forecast for Fri Nov 12, 2021
Cooke City, 2021-11-11
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    • Saddle Peak, Bridger Range

    Date
    Activity
    Skiing

    Fitness skinning around Bridger Bowl yesterday and noticed a fairly large, new avalanche on the east face of the North peak of Saddle. Maybe 100 feet below the ridge, about 100 wide at the crown, ran thru the rock bands but not over the cliff. Was taken back by the clean propagation.

    Region
    Bridger Range
    Location (from list)
    Saddle Peak
    Observer Name
    Albert
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