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 last year. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Clearing skies and warming temperatures on Wednesday will set the stage for wet avalanche concerns as the day heats up. Steer around steep slopes that show signs of warming, especially if the snow feels wet and unsupportable under your feet or machine. Small pockets of unstable wind slab may exist in upper elevation terrain, especially in areas closer to the Cascade Crest. 

Problemas de aludes

  • Loose Wet

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

    It won’t take much solar input and warming for snow to roll down hill on Wednesday. These wet loose avalanches could entrain the new snow accumulations and could gouge into older wet snow from past days, which could make for some large wet avalanches in bigger terrain. Look for these wet loose avalanches to get started on more solar (SW-SE) aspects, but they may start peeling off more northerly slopes as the day heats up. 

    On Wednesday, pay close attention to your aspect, timing, and boot penetration to help you reduce your exposure to this problem. Once you notice rollerballs and pinwheels shedding, move to more shaded or lower elevation slopes. Deep boot penetrations are also tell-tale signs of a wet and weak snowpack.

    While wet loose avalanches will be the more widespread problem, I wouldn’t write off an isolated wet slab in bigger terrain. Wet slabs are notoriously difficult to forecast but are worth considering due to the consequences of these things. Your best mitigation strategy to deal with these wet avalanche concerns on Wednesday is to avoid large, steep slopes that are warming up or feel punchy and wet under your feet or skis. You’ll find safer riding or climbing on shaded slopes that are well-supported and more shaded from the hot April sun.

    (4/5/2025) East Central

    You may see wet loose slides like this on Wednesday. 

  • Wind Slabs

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

    Due to the warm springtime temperatures, expect these slabs to be bigger and more widespread as you climb above 6000 ft or the closer you move towards the Cascade Crest. These slabs will range from soft to hard and may vary in sensitivity based on elevation and what they rest over. 

    Use small test slopes and snowpack tests to help you gauge slab reactivity. Shooting cracks or drum-like surfaces are good reasons to head for more sheltered terrain. Consider giving wind-loaded slopes over 35 degrees some time to settle out before commiting to bigger terrain. 

    Cornices are likely quite large and will weaken with the warmer temperatures. Give these overhanging chunks of snow some extra space on Wednesday. 

    (4/8/2025) White Pass Backcountry

    These obvious signs of wind loaded snow occurred on an exposed feature well below the main ridgeline. 

    Photo: Dallas Glass

Avalanche Discussion

As of 5 PM on Tuesday, weather stations around the zone have picked up 2- 4 inches of new snow. The Cascade Crest picked up 5-10 inches of new snow, with higher amounts as you gain elevation. An NWAC Forecaster was traveling in the White Pass area on Tuesday, you can read their full observation here. In typical Cascade fashion, expect more dangerous avalanche conditions if you find yourself closer to Chinook, White Pass, or Mt Adams on Wednesday. 

If you get out, we would love to hear from you. Submit a snowpack, weather, or avalanche observation here. 

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