24-25

Buried layers of surface hoar often show up a stripe in a snowpit wall (other things such a thin melt-freeze crust can look similar but feel much differently). A snowmobiler-triggered avalanche in Sunlight Basin broke on this weak layer of feathery surface hoar. Photo: GNFAC

Avalanche Details: Persistent Slab Avalanches in Taylor Fork
Southern Madison, 2025-02-13
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    • We rode into the Taylor Fork on Feb 13, We saw four persistent slab avalanches that likely broke last weekend or at the beginning of the week. All appeared to be snowmobiler-triggered R1-2, D1.5-2 avalanches at broke of the January layer of near-surface facets and surface hoar. Photo: GNFAC

    Avalanche Details: Persistent Slab Avalanches in Taylor Fork
    Southern Madison, 2025-02-13
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    • Wind Slab Avalanche in Hyalite

    NORTHERN GALLATIN RANGE
    Northern Gallatin
    Code
    SS-N-R1-D1
    Elevation
    7500
    Aspect
    W
    Latitude
    45.44150
    Longitude
    -110.95400
    Notes

    Climbed in the Mummy II area in Hyalite today. West facing ~7,500'. Lots of spindrift coming down onto the climbs in the area and we noticed lots of snow blowing around up high. No snow fell while we were there but our trail in was almost fully filled in and covered with a few inches to a couple feet of wind slab on the way out. Saw a small natural slide that started at the bottom of Cyptorchid. Crown was 10' wide and 8-18" deep, it ran 150' down a very shallow slope and covered the climbers trail. 

    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Soft slab avalanche
    Trigger
    Natural trigger
    R size
    1
    D size
    1
    Problem Type
    Wind-Drifted Snow
    Slab Thickness
    12.0 inches
    Vertical Fall
    150ft
    Slab Width
    10.00ft
    Images
    Wind Slab in Mummy II area (2)
    Wind Slab in Mummy II area (1)
    Snow Observation Source
    Strong winds and wind slab avalanche in Hyalite
    Slab Thickness units
    inches
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    24-25
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