Boletín de aludes

East Slopes South

Northwest Avalanche Center
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Peligro de aludes

Thu
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Desactualizado: este boletín caducó 2 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

With a warm sunny day on tap,  you're likely to see or trigger small wet loose avalanches. Avoid triggering a wet loose avalanche near terrain traps like gullies, cliffs and open creeks. At higher elevations where you find firmer, wind-drifted snow you may trigger a shallow wind slab on nearby lee slopes.  

Problemas de aludes

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–1.5

    Above the recent rain/snow line (~5500'), recent storm snow will be primed to slide downhill in the form of wet loose avalanches. You may see rollerballs and natural wet loose avalanches as the sun and temperatures rise.  These avalanches are predictable and easy to manage until they aren't.  Avoid extreme terrain features and terrain traps (steep trees, cliff bands, open creek holes and exposed rocks) where even a small avalanche can have real consequences.  Where you find wet and punchy snow,  shift to lower angle or cooler/shadier slopes.   

    Wet loose avalanches may become large in areas closer to the Cascade crest where they entrain more recent storm snow.

    (2/10/2024)

    You could encounter similar wet avalanches on Tuesday. 

    Photo: Brad C

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–1.5

    New shallow wind slabs formed on lee slopes mainly near the Cascade crest and at upper elevations following Tuesday's storm and strong west winds.  As you gain elevation, look for fresh drifts, cornices, and wind-textured snow to help you identify wind-loaded features and steer you away from steep lee slopes where you're most likely to trigger a wind slab avalanche.  Shooting cracks in wind-affected snow and small test slopes will help you gauge the bond of the new snow to the old.  

    (1/19/2024)

    Slightly wind-stiffened snow showing reactivity in skintrack tests. 

    Photo: Caya Johnson

Avalanche Discussion

Tuesday's storm delivered a wide range of snowfall totals based on proximity to the Cascade crest and elevation.  Near the Cascade crest, you're likely to find 2-4" of new snow with deeper drifts in wind-loaded terrain. On the other extreme, the eastern mountains likely saw a dusting to an inch.   

Lower elevations are melting out quickly this year. Be prepared for more challenging approaches, firm snow, and low coverage extending into middle elevations. Open creeks, exposed rocks, and slide-for-life conditions can easily exacerbate the consequence of a small avalanche. 

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