Bulletin d’avalanche

Stevens Pass

Northwest Avalanche Center
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Danger d’avalanche

Sun
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
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Périmé — ce bulletin a expiré 2 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

A wet and potent storm will bring very dangerous conditions by Saturday afternoon. You may encounter wet avalanches running naturally on steep slopes. Watch for rollerballs and natural avalanches as signs of the danger and avoid traveling under steep slopes where slides could come down from above. 

Problèmes avalancheux

  • Wet Slabs

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

    Loose wet avalanches will be the most common type to encounter today. If you see weak, moist snow that slides easily or natural avalanches, stick to lower-angle terrain.

    The potential for larger wet slabs involving older weak layers brings serious consequences. Facets of the January Drought Layer layer are 2-3 feet below the surface and will become very weak once they get wet. Use extra caution if you see avalanches gouging deep into the snowpack or wet slabs breaking on deeper weak layers. 

  • Storm Slabs

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

    You can expect avalanches where you find 6" or more of new snow. The terrain above 6,000ft should receive mostly snow, but even there, it will come in warm and heavy. Moderate southwest winds will make avalanches even more likely on leeward sides of ridges.

    Watch for avalanches and cracking in the new snow. Use small test slopes and frequent informal tests to see how easily the snow slides. Stick to smaller slopes and confined terrain. If you experience whumpfing collapses or see avalanches break into deeper layers, you should avoid all avalanche terrain. See more below.

    (12/24/2024)

    Intentionally triggered storm slab on a steep convex roll in the Stevens Pass Backcountry. 

    SS-AS-R2-D1-I

     

    Photo: Katie Warren

Avalanche Discussion

Expect a massive spike in avalanche danger Saturday night through Sunday. We anticipate a widespread cycle of natural avalanches by Sunday. Some of these could be very large and could run on deeper weak layers. While the snow at the January Drought Layer has been rounding, water will quickly weaken. This could be perfect conditions for a widespread wet slab avalanche cycle. 

 

 

Régions couvertes