21-22

Skier Triggered Avalanche Silver Gate

COOKE CITY
Cooke City
Code
SS-AS-R2-D2-O
Elevation
9400
Aspect
SE
Latitude
45.02020
Longitude
-109.93800
Notes

From email: "I observed what looked to be a fresh skier triggered avalanche yesterday late afternoon.  And photographed it this morning, while on the highway in Silver Gate (attached).  I am pretty sure it happened yesterday, Feb. 12th.

It's a SE aspect, at about 9400'."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
R size
2
D size
2
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Images
Skier Triggered Avalanche Silver Gate
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
21-22

Skiers in Cooke City observed this avalanche from the road in Silver Gate and believe it was triggered on Feb. 12th. Photo: B Fredlund 

Avalanche Details: Skier Triggered Avalanche Silver Gate
Forecast link: GNFAC Avalanche Forecast for Mon Feb 14, 2022GNFAC Avalanche Forecast for Tue Feb 15, 2022GNFAC Avalanche Forecast for Wed Feb 16, 2022GNFAC Avalanche Forecast for Thu Feb 17, 2022GNFAC Avalanche Forecast for Fri Feb 18, 2022
Cooke City, 2022-02-13
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    • Natural Avalanche in Wyoming Creek

    Wyoming Creek
    Cooke City
    Code
    SS-NC-R2-D2-O
    Elevation
    9800
    Aspect
    NE
    Latitude
    44.98150
    Longitude
    -109.97400
    Notes

    From obs 2/12/22: "N-SS-R2-D2-i. Appeared to have happened early in the early morning of 20220212."

    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Soft slab avalanche
    Trigger
    Cornice fall
    R size
    2
    D size
    2
    Bed Surface
    O - Old snow
    Problem Type
    Persistent Weak Layer
    Slab Thickness
    12.0 inches
    Slab Width
    175.00ft
    Images
    Natural Avalanche in Wyoming Creek
    Slab Thickness units
    inches
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    21-22

    Maid/Bole/Divide Area

    Date
    Activity
    Skiing

    We skied the SW face of Mt Bole yesterday (2/12) into the head of Storm Castle creek before wrapping back around to Divide. The only evidence of semi-recent avalanches was some cornice debris covered by the previous day’s snow off of the Arden and Bole ridge lines. The winds were gusting quite hard but not with enough frequency to facilitate much transport, and slab formation was minimal on all leeward aspects. There was around 2-4 inches of new snow at tree line and in the alpine. My most notable observation was just how THIN that whole area is, I hadn’t been up to the maid yet this year and was blown away by how many rocks are still out. 

    Region
    Northern Gallatin
    Location (from list)
    Mt. Bole
    Observer Name
    Henry Coppolillo
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