Bulletin d’avalanche

Salt River and Wyoming Ranges

Bridger-Teton Avalanche Center
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Danger d’avalanche

Sat
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Périmé — ce bulletin a expiré 4 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

The combination of recent snow, wind, and buried weak layers make human triggered avalanches possible today. Cracking within wind drifted snow and audible collapsing of the snowpack are signs of instability. Carefully assess the snowpack before entering steep, rocky terrain with thin coverage.  

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2

    The November 27 layer is now buried 1-3 feet below the surface of the snow at the middle and upper elevations. This layer is present on all aspects at the middle and upper elevations with varying degrees of weakness. Shallow areas of the snowpack in and around rocky zones are suspect, especially where recent low density snow and light/moderate winds have conspired to increase loading. 

    Persistent slab avalanches can be triggered remotely, from above, to the sides, or below a slope. They fail in unpredictable ways, break wider than you might expect, and pull back into lower-angle terrain connected to steeper slopes.

    (12/13/2022)

    Gusty winds transporting snow up Granite Creek

Avalanche Discussion

Cold temperatures and clear weather with valley inversion worked to create a thick layer of weak sugary snow in the mid November time frame. This layer of weak snow is the main concern throughout the Greys River, Salt River, and Palisades ranges. Stability is trending upward as cold temperatures and incremental loading are working to decrease the reactivity of buried weak layers but structure is still poor.

Régions couvertes