Bollettino valanghe

East Slopes North

Northwest Avalanche Center
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Pericolo valanghe

Sun
Alta quota
3 · Marcato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 2 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Expect dangerous avalanche conditions near the Cascade crest and Washington Pass. In these areas you could see natural wet avalanches big enough to bury or injure you. Watch for triggering wet avalanches wherever you find significant rain falling on previously dry snow. 

Problemi valanghivi

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–2

    Avoid traveling or stopping under steep overhead terrain, especially below rock slabs and cliffs where large wet avalanches could come down from above. Carefully assess small test slopes before venturing onto any terrain over 35 degrees. If you find wet snow that slides easily, or rain water reaching deep into the snowpack, stick to lower-angle slopes.

    Natural, wet avalanches will be most prevalent near the Cascade crest. They could be large at middle and upper elevations. Avalanches will be most likely where the snow surface stayed dry through Friday, which includes west through north through east aspects.

    (12/4/2024)

    Previous accumulations of wet loose debris, presumably from the past several days.  We observed only much smaller avalanches today.  More supportable travel than expected, with ski pen <10cm.

    Photo: Drew Lovell

Avalanche Discussion

A wet storm will move in before day-break on Saturday, bringing rain to the zone before switching to snow later in the day. Precipitation will favor the Cascade crest, and we expect enough new snow to maintain dangerous conditions through the weekend. The eastern mountains will receive significantly less of both rain and snow, and will experience less elevated avalanche danger. NWAC Observers were near Washington Pass on Wednesday. The cold air pooled just below pass level, and temperatures at higher elevations were in the 40°Fs. On average snow depths were between 2-3ft, with shallower depths on south aspects and wind-scoured slopes. There was plenty of evidence of wet avalanches, some occurring during the day, and older piles of debris from the past few days. All avalanches were small. They reported older and unreactive wind-affected snow surfaces. in sheltered areas, north aspects still held cold, dry snow. Take care as you travel - many early-season obstacles, such as trees, rocks, logs, and creeks, are exposed or sometimes barely hidden underneath wind drifted surfaces. 

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