Northern Gallatin

From 5/21/22: "Triggered a small slide underneath the cornice of the southeast chute off of Emigrant peak. The slide was 50 ft wide,  4 inches deep, and ran for about 100 ft. The slide was not large enough to knock you off your feet (D1). The latest storm had deposited about 12 inches of new snow underneath the cornice." Photo: C. Chupik

Out of Advisory Area, 2022-05-26
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    • Emigrant peak observations

    Date
    Activity
    Skiing

    Triggered a small slide underneath the cornice of the southeast chute off of Emigrant peak. The slide was 50 ft wide,  4 inches deep, and ran for about 100 ft. The slide was not large enough to knock you off your feet (D1). The latest storm had deposited about 12 inches of new snow underneath the cornice. 
     

    other older slides were visible on a wind loaded NW oriented slopes at the bottom of the basin. Still feels like winter out there with lots of light snow up high!

    Region
    Northern Gallatin
    Location (from list)
    Emigrant Peak
    Observer Name
    Colin Chupik

    From 5/13/22: "saw a lot of recent slide activity on East facing slopes above 9000’ in Blackmore and adjacent basins. This one was at around 9800’ between Blackmore and Elephant Peak. Also the wind was ripping up top in the afternoon. Moving a lot of snow from W to E." Photo: JR Mooney

    Avalanche Details: Natural wind slabs and wet slide, Cooke and Blackmore 5/13-5/15
    Northern Gallatin, 2022-05-18
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    • Roller-ball to point release to wet slide

    Date
    Activity
    Skiing
    Snowmobiling

    We saw a point release that mobilized a slab of new snow on an East facing slope off of mt fox in cooke city. 
     

    cool example of a roller ball turning into a point release and into a wet slide avalanche. The new snow had heated up considerably during the day on Sunday. There were some older crowns below a cornice to the north of mt fox (second photo) with slide debris that extended down the whole face (600ft). Likely slid during a storm within the last week

    Region
    Cooke City
    Location (from list)
    COOKE CITY
    Observer Name
    Colin Chupik

    Many natural storm snow slab avalanches at Bridger

    Bridger Bowl
    Bridger Range
    Code
    SS-N-R2-D1.5-S
    Elevation
    7500
    Aspect Range
    NE-E-SE
    Latitude
    45.81560
    Longitude
    -110.92300
    Notes

    There were many similar depth, 8-12" natural crowns along the ridge that broke this morning or overnight within the recent snow that fell over the weekend.

    Number caught
    0
    Number buried
    0
    Avalanche Type
    Soft slab avalanche
    Trigger
    Natural trigger
    R size
    2
    D size
    1.5
    Bed Surface
    S - Avalanche released within new snow
    Problem Type
    New Snow
    Slab Thickness
    12.0 inches
    Vertical Fall
    300ft
    Slab Width
    150.00ft
    Images
    Natural avalanche in north bowl
    Crown of natural avalanche in north bowl 2
    Natural avalanche crown in North Bowl
    Graupel layer at bridger
    Slab Thickness units
    inches
    Single / Multiple / Red Flag
    Multiple Avalanches
    Advisory Year
    21-22

    Natural Loose snow avalanches at Bridger and Beehive

    Beehive Basin
    Bridger Range
    Code
    WL-N-R1-D1.5-I
    Elevation
    8500
    Aspect Range
    NE-E-S
    Latitude
    45.34070
    Longitude
    -111.39100
    Notes

    Widespread natural loose snow avalanches on 5/4 in Bridger and Beehive. 6-12" of snow that fell on 5/3 was quickly reactive when the sun came out with temps to 40 F on 5/4.

    Number caught
    0
    Number buried
    0
    Avalanche Type
    Wet loose-snow avalanche
    Trigger
    Natural trigger
    R size
    1
    D size
    1.5
    Bed Surface
    I - Interface between new and old snow
    Problem Type
    New Snow
    Images
    Natural wet loose avalanche in Beehive
    Natural wet loose slides at Bridger
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Multiple Avalanches
    Advisory Year
    21-22
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