Bulletin d’avalanche

Stevens Pass

Northwest Avalanche Center
Voir sur la carte

Danger d’avalanche

Sat
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
Open full map
Périmé — ce bulletin a expiré 3 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Stormy winter weather returns on Friday with cold temperatures, moderate snowfall, and increasing wind. You may be able to trigger avalanches where you find 6" or more of new snow over consistent, old snow on slopes steeper than 35 degrees. Avoid avalanches by sticking to low-angle slopes.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5

    Expect increasing avalanche danger throughout the day. Cracks shooting through the snow or natural avalanches are red flag signs that conditions have elevated. By afternoon, you may be able to trigger small avalanches where you find over 6" of new snow on smooth snow-covered slopes. Use quick tests and small slopes to check how easily the new snow slides on old surfaces. Anticipate more dangerous conditions as you gain elevation. Avalanches may be bigger and easier to trigger where the wind forms deeper drifts just below ridges. 

    The new snow will be very light and dry and it will fall on various weak layers like facets, surface hoar, and slick crusts. Even if the snow isn't cohesive, it may slide easily. 

    (11/14/2023)

    The new snow could slide easily on weak old snow like this surface hoar. 4,200ft, Stevens Pass

    Photo: Matt Primomo

Avalanche Discussion

Cold temperatures could wring out up to a foot of low-density snow. Even if the bond between the new and old snow isn't a problem for Friday, weak layers may be the source of avalanches as snow accumulates over the weekend. The coming week will bring intense storms and, at times, warm temperatures. We expect dangerous avalanche conditions to develop as snow (and rain) accumulates.

It's still early season, and our confidence in the avalanche forecast is low. Approach mountain travel with caution and be ready to make your own assessments. Snow cover is still shallow in many places. Hitting buried rocks, stumps, and creeks may be your most significant hazard of the day.

Anyone can add to the forecast. Let us know what you see in the mountains by submitting an observation.

Régions couvertes