18-19

Skiers triggered this avalanche in dense trees while ascending Mt. Ellis. From the email: "While subsequently skiing up through dense trees climbing to the north to attempt to reach the mid section of the going-home chute, a medium-size bowl-shaped opening in the trees released a soft slab just as we were entering the opening. The crown was ~24” deep and ~80-100’ across. Total snow depth in that area was less than three feet. The avalanche ran probably 500 vertical feet down a shallow gully. Neither my partner nor I where caught but way too close for comfort." 

Avalanche Details: Skier Triggered Avalanche Mt. Ellis
Forecast link: GNFAC Avalanche Forecast for Mon Jan 28, 2019GNFAC Avalanche Forecast for Sun Feb 3, 2019GNFAC Avalanche Forecast for Mon Feb 4, 2019
Northern Gallatin, 2019-01-27
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    • Skiers triggered this avalanche in dense trees while ascending Mt. Ellis. From the email: "While subsequently skiing up through dense trees climbing to the north to attempt to reach the mid section of the going-home chute, a medium-size bowl-shaped opening in the trees released a soft slab just as we were entering the opening. The crown was ~24” deep and ~80-100’ across. Total snow depth in that area was less than three feet. The avalanche ran probably 500 vertical feet down a shallow gully. Neither my partner nor I where caught but way too close for comfort."

    Avalanche Details: Skier Triggered Avalanche Mt. Ellis
    Forecast link: GNFAC Avalanche Forecast for Mon Jan 28, 2019GNFAC Avalanche Forecast for Wed Jan 30, 2019
    Northern Gallatin, 2019-01-27
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    • Widespread Avalanching in Divide Drainage

    Divide Cirque
    Northern Gallatin
    Code
    SS-NCr-R3-D2.5-O
    Aspect
    SE
    Latitude
    45.39030
    Longitude
    -110.96900
    Notes

    A skier in Hyalite reported widespread avalanche activity in the Divide drainage. From the email: "Saw this set of crowns just to the looker's left of Divide Peak proper.  Appear to be cornice triggered, I suspect they all released sympathetically, maybe sometime yesterday.  Impressively connected, definite PWL issue. SE aspect. Crowns spanned nearly 1/2 mile of terrain." Photo: B. VandenBos

    Multiple Avalanches
    Number caught
    0
    Number buried
    0
    Number killed
    0
    Avalanche Type
    Soft slab avalanche
    Trigger
    Cornice fall
    Trigger Modifier
    r-A remote avalanche released by the indicated trigger
    R size
    3
    D size
    2.5
    Bed Surface
    O - Old snow
    Problem Type
    Persistent Weak Layer
    Images
    Widespread Avalanching in Divide Drainage (1)
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Multiple Avalanches
    Advisory Year
    18-19

    A skier in Hyalite reported widespread avalanche activity in the Divide drainage. From the email: "Saw this set of crowns just to the looker's left of Divide Peak proper.  Appear to be cornice triggered, I suspect they all released sympathetically, maybe sometime yesterday.  Impressively connected, definite PWL issue. SE aspect. Crowns spanned nearly 1/2 mile of terrain." Photo: B. VandenBos

    Northern Gallatin, 2019-01-26
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    • A skier in Hyalite reported widespread avalanche activity in the Divide drainage. From the email: "Saw this set of crowns just to the looker's left of Divide Peak proper.  Appear to be cornice triggered, I suspect they all released sympathetically, maybe sometime yesterday.  Impressively connected, definite PWL issue. SE aspect. Crowns spanned nearly 1/2 mile of terrain." Photo: B. VandenBos

    Northern Gallatin, 2019-01-26
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  • Original

    • A skier in Hyalite reported widespread avalanche activity in the Divide drainage. From the email: "Saw this set of crowns just to the looker's left of Divide Peak proper.  Appear to be cornice triggered, I suspect they all released sympathetically, maybe sometime yesterday.  Impressively connected, definite PWL issue. SE aspect. Crowns spanned nearly 1/2 mile of terrain." Photo: B. VandenBos

    Avalanche Details: Widespread Avalanching in Divide Drainage
    Northern Gallatin, 2019-01-26
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    • Large Collapses in Deer Creek Drainage

    Deer Creek
    Northern Madison
    Code
    AS
    Elevation
    7400
    Latitude
    45.30160
    Longitude
    -111.20700
    Notes

    From the email: "We experienced many small, localized collapses below 7400'. Above 7400', the collapses/ whumphing were much larger (propagating far) and louder. We had two occasions where one of us triggered a whumph from 150+ feet away and the other person (standing still) felt and hear it. Dug two pits: first one on S aspect at 7600' got ECTP14 49 cm down on facets below a melt freeze crust. Second pit (E aspect, 8130 feet) got ECTP13 down 78 cm on 2-3 mm facets" - A. Alloway

    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Trigger
    Skier
    Images
    Deer Creek Snowpit Profile
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    18-19
    Subscribe to 18-19