Bollettino valanghe

Stevens Pass

Northwest Avalanche Center
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Pericolo valanghe

Thu
Alta quota
4 · Forte
Limite del bosco
4 · Forte
Sotto il limite
4 · Forte
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Non aggiornato — questo bollettino è scaduto 5 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Avoid all avalanche terrain and backcountry travel. Expect unusually dangerous conditions with widespread avalanches, some that could be very large and destructive. A uniquely potent storm will raise concern for roof avalanches and slides in lowland terrain.

Problemi valanghivi

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Certain
    Dimensione
    2–3

    This is a day to avoid the mountains altogether. Avalanches are very likely to certain on slopes 35 degrees or steeper. Very large avalanches could run from upper elevations to below treeline. Avalanches could be destructive and big enough to bury cars or break trees. Even if traveling on roads, stay far out from under any avalanche paths and do not stop or linger in runout zones. With the potent storm and current snowpack, we know there will be avalanches. We are uncertain exactly how big and destructive these slides will be.

    Up to 4" of precipitation will fall as snow (roughly 40") above 4,000ft by late Thurdsay. Expect wet avalanches at lower elevations. Avalanches could run on older layers in the top 3 feet of the snowpack. Access and travel will be limited due to road closures. Impacts of avalanches could include low elevation terrain where avalanches are rarely a concern and roof avalanche hazards. Use caution around any large roofs holding snow, and make sure children and pets are not exposed to roof hazards.

    (1/12/2021) An example from last season of the extent of natural storm slab avalanches we could expect.  Rock Mountain, SE, 5400ft. Photo: Josh Hirshberg

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