Bollettino valanghe

West Slopes South

Northwest Avalanche Center
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Pericolo valanghe

Sun
Alta quota
2 · Moderato
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

As you ascend in elevation, you may encounter wind-loaded features, particularly on the volcanoes. If you find more than 6 inches of snow over a crust, you'll know that small avalanches are possible. You'll have a higher chance of triggering a slide on convex features or in rocky chutes.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1

    There may be just enough dry snow on the volcanoes that shallow wind slabs could develop. Look for actively blowing snow, fresh drifts, textured surfaces, or new cornices to determine where these unstable pockets may exist. You can feel for changes in the depth of snow over the crust to help identify wind-loaded features to avoid. They'll be more common on leeward ridgelines, on convex features, or near rocky outcrops such as the base of cliffs or confined chutes. 

    (4/4/2024)

    Actively blowing snow on a ridgeline in the Tatoosh Range. A good indication of possible wind slab development.

    Photo: Andy Harrington

Avalanche Discussion

Recent days have been more winterlike after a warm start to the work week resulted in a wet avalanche cycle. During this snowy period, several waves of precipitation and wind slowly increased depth over a series of melt-freeze crusts. 

On Saturday, we'll get the biggest shot of precipitation this week, particularly on the volcanoes. While these storm totals are modest by winter standards or on their own, cumulatively, there should be enough snow and wind that you need to think about small avalanches. Any potential slide should be confined to the snow above the most recent melt-freeze crust. Closer to the crest, snow depths may not reach the threshold for impactful avalanches. You should still travel cautiously and keep a keen eye out for small slides.

Despite the winter-like landscape, it's definitely spring. All it takes is a few sun breaks or thin clouds for dry avalanche problems to transition to wet avalanche problems. If you see new rollerballs or the snow surface is moist, put wet avalanches on your radar and head for shadier slopes. 

Lower elevations will likely have more travel hazards than avalanche potential. Although open holes/creeks, shallowly buried rocks, and refrozen avalanche debris are more prevalent down low, they litter the landscape at all elevations.

Regioni coperte