20-21

Sledder triggered slide and 2 naturals in Centennials

CENTENNIAL RANGE
Island Park
Code
SS-AM-R2-D2
Latitude
44.54760
Longitude
-111.52500
Notes

From obs: "...Two natural slab avalanches on north aspect of Reas Peak, one from recent storm and one from previous storm. Photo is from a snowmobile triggered avalanche from 1/9/21, you can see the party and one of the members riding the adjacent slope."

Number of slides
3
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Snowmobile
R size
2
D size
2
Images
Sledder triggered on Tin Cup Pass-Mt. Jefferson
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year
20-21

From obs: "Rain crust is still very present in the snowpack. Two natural slab avalanches on north aspect of Reas Peak, one from recent storm and one from previous storm. Photo is from a snowmobile triggered avalanche from 1/9/21, you can see the party and one of the members riding the adjacent slope." Photo: C. Hericks

Avalanche Details: Sledder triggered slide and 2 naturals in Centennials
Forecast link: GNFAC Avalanche Forecast for Sun Jan 10, 2021
Island Park, 2021-01-10
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    • Avalanche in Goose Crk near Cooke

    Goose Creek
    Cooke City
    Code
    SS-N-R2-D1.5-O
    Elevation
    9000
    Aspect
    N
    Latitude
    45.09230
    Longitude
    -109.95100
    Notes

    From email: "We suspect this happened fresh today, we  wonder if those animal tracks coming in from the left triggered it. North facing, 2 ft crown, (I’d guess), about 9k feet, facing Goose Creek. So our friends (while ski cutting) triggered a  very similar slideslidehis same aspecaspectation mid afternoon today, about 1/4 mile farther west along this ridge, looked to be same depth."

    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Soft slab avalanche
    Trigger
    Natural trigger
    R size
    2
    D size
    1.5
    Bed Surface
    O - Old snow
    Slab Thickness
    24.0 inches
    Vertical Fall
    200ft
    Slab Width
    40.00ft
    Images
    Slide in Goose Creek near Cooke
    Slab Thickness units
    inches
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    20-21

    From email:"We suspect this happened fresh today (1/9/21), we  wonder if those animal tracks coming in from the left triggered it. North facing, 2 ft crown, (I’d guess), about 9k feet, facing Goose Creek. So our friends (while ski cutting) triggered a  very similar slide on this same aspect/elevation mid afternoon today, about 1/4 mile farther west along this ridge, looked to be same depth." Photo: S. Strenge

    Avalanche Details: Avalanche in Goose Crk near Cooke
    Forecast link: GNFAC Avalanche Forecast for Sun Jan 10, 2021
    Cooke City, 2021-01-10
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