Boletín de aludes

Stevens Pass

Northwest Avalanche Center
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Peligro de aludes

Thu
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
2 · Moderado
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Desactualizado: este boletín caducó 4 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Recent snow and wind are maintaining the chance for small avalanches on most steep slopes.  You can trigger avalanches at middle and upper elevations where east winds drift fresh slabs of snow. In wind-sheltered terrain, you may be able to trigger small loose avalanches.

Problemas de aludes

  • Wind Slabs

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

    Use caution on leeward slopes 35 degrees and steeper. Look for blowing snow from east winds or evidence of recent drifting. If you see cracks shooting through drifted snow, stay off of steeper, consequential slopes. Cornices may be fragile from recent growth and could break under the weight of a person.

    East winds have drifted slabs since Monday. On Wednesday, we could still see enough wind for light drifting of shallow slabs on the highest slopes and the most wind-exposed locations. East winds often favor specific features, such as Tye Peak, Lichtenberg Mountain, and the Moonlight area, where the wind gets channeled and accelerated near the Highway 2 corridor and adjacent east-west running drainages. 

    (4/12/2022)

    East and NE winds formed drifts and wind features on a west-facing slope. Moonlight area

    Photo: Matt Primomo

  • Loose Dry

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

    Light, dry snow continues to accumulate each day.  On Wednesday, you can trigger two types of loose avalanches- those that involve cold snow on steep shaded slopes, and those that involve snow that warms up on slopes that get direct sunshine. In either case, the advice is similar. Stay alert to changing conditions and slopes well over 35 degrees where the snow slides easily. Use small test slopes to check how the snow is behaving. Use extra caution near slopes with terrain traps like trees, gullies, or rocks.  In these locations, small slides could result in injury or worse.

    If clouds break, the surface of east-south-west aspects could quickly become warm and weak. Even 10 minutes of sun could be enough to trigger natural loose avalanches. If you see clearing skies and warming of the surface snow, consider moving to more shaded aspects or slopes less than 35 degrees. Dry loose avalanches in storm snow have been common on a variety of aspects over the past few days. 

    (4/12/2022) A small loose wet avalanche on Lichtenberg Mtn. 4,500ft, SE Photo: Josh Hirshberg

Avalanche Discussion

Observers measured another 6" of accumulated snow on Tuesday. You can find 1.5-2 feet of recent snow over the most significant crust, buried on April 8th.  Recent snow amounts will vary as you move east and west of the Cascade crest as well as higher in the mountains.

On Tuesday, NWAC forecasters near both Skyline Lake and Lanham creek reported shallow avalanches in the recent snow. Very steep features near rocks and trees on Lichtenberg  Mtn and Jim Hill produced a handful of shallow point releases as the sun briefly warmed the surface snow. A skier triggered a shallow slab avalanche (about 6" deep by 50 feet across) at the top of the Moonlight area on a steep, cross-loaded feature. If you're in the mountains, submit an observation and let us know what you see.

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