Boletín de aludes

Snake River Range

Bridger-Teton Avalanche Center
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Peligro de aludes

Thu
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
1 · Débil
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Desactualizado: este boletín caducó 9 months ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Human triggered avalanches remain likely today. Recent snowfall above 8,500’, strong winds and rain up to 8,700’ continue to stress weak layers in the snowpack. Evaluate the snow and weather carefully today if you venture out as abnormally warm and wet weather continues to impact the snowpack. A shallow snowpack at lower elevations continues to present obstacles to access and potential hazards just under the surface.

Problemas de aludes

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1.5–2.5

    Observers in the Tetons and Togwotee yesterday found conditions that were not as unstable as expected given the forecasted winter storm. They did however find that the snowpack structure remains a real concern despite the underwhelming amount of new snowfall. The primary layer of concern in the upper snowpack continues to show signs of potential triggering. Slab thickness could be two or even three feet thick in high, windloaded aspects. Observations are sparse in the Snake River, Salt and Wyoming Ranges due to limited access but a recent observation from Prater Canyon confirmed that weak layers near the surface are unstable. Dig frequently to identify layers of concern if you venture out.

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2

    You’ll find slab depths in wind loaded terrain of one to two feet with the greatest depths at higher elevations in exposed, rocky locations. Stubborn but thicker wind slabs that developed days ago may be up to two feet thick in high northerly locations. The warming conditions are likely to make these wind slabs easier to trigger. 

    Temperatures will continue to warm today so be aware of the potential for wet loose avalanches below 9,000’ or so. These could entrain new snow and push you where you don’t want to go.

Avalanche Discussion

Peak instability from this winter storm is likely to have passed already. Forecasted snowfall did not pan out but the warming trend and continued snowfall and wind remains a concern. This warmth will ultimately help stabilize our early season weak layers but the heat will increase instability for today. We’ll have to wait and see how today’s weather contributes to new snow avalanche problems. Weather forecast uncertainty contributes heavily to avalanche forecast uncertainty so evaluation is the name of the game today.

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