21-22

"We also conducted avalanche mitigation on our Cabin’s Road at 4:30pm. The snowpack in this zone doesn’t get skied and is representative of the backcountry. The slope is ENE around 8,400’. Several wet slab avalanches were produced with explosives and ski cutting. The avalanches ranged from R4/D2 to R2/D1. They all hit the road and several crossed, and buried, the Cabin’s Road. Although most of this mitigation was done with explosives, it took minimal effort with skis to get snow moving. The crowns were 2-3’ deep and ran on the ground." Photo: YCSP

Avalanche Details: Explosive and skier triggered wet slabs at Y.C.
Forecast link: GNFAC Avalanche Forecast for Mon Mar 28, 2022GNFAC Avalanche Forecast for Tue Mar 29, 2022GNFAC Avalanche Forecast for Wed Mar 30, 2022GNFAC Avalanche Forecast for Thu Mar 31, 2022
Northern Madison, 2022-03-28
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    • Natural wet slabs near Cooke City

    Wall Mountain
    Cooke City
    Code
    WS-N-R2-D2-O
    Elevation
    9000
    Aspect Range
    NW-S
    Latitude
    44.99770
    Longitude
    -109.97800
    Notes

    On 3/27/22 we saw a natural wet slab crown on Wall Mtn. south of Silver Gate. It appeared less thanb 24 hours old, maybe occurred earlier in the day. Later in the day we saw a wet slab crown on the south side of Mineral Mtn. that was not there when we drove in.

    Number of slides
    2
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Wet slab avalanche
    Trigger
    Natural trigger
    R size
    2
    D size
    2
    Bed Surface
    O - Old snow
    Problem Type
    Wet Snow
    Images
    Wet slab south of Silver Gate
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Multiple Avalanches
    Advisory Year
    21-22

    Natural wet loose slides near Cooke

    Barronette Peak
    Cooke City
    Code
    WL-N-R1-D1.5-O
    Elevation
    9000
    Aspect
    E
    Aspect Range
    E-SE
    Latitude
    44.97520
    Longitude
    -110.08700
    Notes

    We observed widespread natural wet loose activity on 3/27/22 on the way into Cooke City. Slides were 8-12" deep and happened yesterday and today. While pulled over to photograph a crown we heard avalanches running on slopes nearby.

    Number caught
    0
    Number buried
    0
    Avalanche Type
    Wet loose-snow avalanche
    Trigger
    Natural trigger
    R size
    1
    D size
    1.5
    Bed Surface
    O - Old snow
    Problem Type
    Wet Snow
    Images
    Wet slides on peak 9595' near YNP
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Multiple Avalanches
    Advisory Year
    21-22

    Natural slabs on Sphinx and Cedar

    Cedar Mtn.
    Northern Madison
    Code
    WS-N-R1-D1.5-O
    Elevation
    9000
    Aspect
    SE
    Aspect Range
    SE-N
    Latitude
    45.22680
    Longitude
    -111.51200
    Number of slides
    2
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Wet slab avalanche
    Trigger
    Natural trigger
    R size
    1
    D size
    1.5
    Bed Surface
    O - Old snow
    Problem Type
    Wet Snow
    Images
    Natural wet slab on Cedar Mtn.
    Natural slab Aalanche on the Sphinx
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Multiple Avalanches
    Advisory Year
    21-22

    Wet Loose Avalanches in the Northern Bridger Range

    Northern Bridgers
    Bridger Range
    Code
    WL-N-R2-D1.5-O
    Elevation
    8500
    Aspect
    E
    Latitude
    45.91960
    Longitude
    -110.97600
    Notes

    We observe many wet loose avalanches in the northern Bridger Range. Some of them gouged down into old snow near or at the ground. 

    Number of slides
    4
    Number caught
    0
    Number buried
    0
    Number killed
    0
    Avalanche Type
    Wet loose-snow avalanche
    Trigger
    Natural trigger
    R size
    2
    D size
    1.5
    Bed Surface
    O - Old snow
    Problem Type
    Wet Snow
    Vertical Fall
    500ft
    Images
    Wet Loose Avalanches in the Northern Bridger Range
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Multiple Avalanches
    Advisory Year
    21-22

    Wet Snow Avalanches North of Ross Peak

    Ross Peak
    Bridger Range
    Code
    WS-N-R2-D2-O
    Elevation
    8000
    Aspect
    E
    Latitude
    45.85860
    Longitude
    -110.95600
    Notes

    We observed 7 natural avalanches north of Ross Peak. There was a mix of wet slab and wet loose avalanches that broke near or at the ground. 

    Number of slides
    7
    Number caught
    0
    Number buried
    0
    Number killed
    0
    Avalanche Type
    Wet slab avalanche
    Trigger
    Natural trigger
    R size
    2
    D size
    2
    Bed Surface
    O - Old snow
    Problem Type
    Wet Snow
    Vertical Fall
    500ft
    Slab Width
    75.00ft
    Images
    Wet Snow Avalanches North of Ross Peak
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Multiple Avalanches
    Advisory Year
    21-22
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