Northern Gallatin

This natural avalanche in 3rd Yellowmule on Buck Ridge likely occurred on Saturday, January 11. It was a wind loaded and very steep slope. It broke on facets near the ground and was big enough to bury a person (D2). The size was 2-3' deep, 200' wide and 75' vertical. Photo: GNFAC

Avalanche Details: Natural Avalanches on Buck Ridge
Forecast link: GNFAC Avalanche Forecast for Mon Jan 13, 2020GNFAC Avalanche Forecast for Tue Jan 14, 2020
Northern Madison, 2020-01-12
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    • Skier triggered avalanche in N. Madison

    Yellow Mountain
    Northern Madison
    Code
    SS-ASu
    Elevation
    9200
    Aspect
    NE
    Latitude
    45.29950
    Longitude
    -111.32000
    Notes

    From an email:

    9200 ft - NE Aspect CT13-Q2 •Wind-loading of leeward N & E facing slopes •10-20 mph winds

    My partner and I skied the apex of the ridge to avoid avalanche terrain, he triggered a soft slab, 1.5 ft deep, off the top of the ridge, crown 100ft wide, ran 300 ft down slope. Collapsing observed on the lower tree portions of the exit out Trail Ck.

    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Soft slab avalanche
    Trigger
    Skier
    Trigger Modifier
    u-An unintentional release
    Slab Thickness
    16.0 inches
    Vertical Fall
    300ft
    Slab Width
    100.00ft
    Slab Thickness units
    inches
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    19-20

    We visited the avalanche that was triggered by a snowmobiler and partially buried 2 people on January 4th. The crown was 10 feet at the deepest part. Photo: GNFAC

    Avalanche Details: Three snowmobilers caught in very large slide on Buck Ridge
    Forecast link: GNFAC Avalanche Forecast for Mon Jan 6, 2020GNFAC Avalanche Forecast for Tue Jan 7, 2020
    Northern Madison, 2020-01-05
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