Bollettino valanghe

West Slopes Central

Northwest Avalanche Center
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Pericolo valanghe

Sun
Alta quota
3 · Marcato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 8 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

You can trigger avalanches in steep wind-loaded terrain on Saturday. Use a lower-angle route to navigate around steep slopes and features you suspect hold wind-drifted snow. Be ready to assess conditions if you make it to upper elevations - few have been up there lately.

Problemi valanghivi

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–1.5

    There should be plenty of soft, uncohesive new snow on the surface by Saturday morning. Descending steep terrain will likely send some snow moving downhill with you. Don’t get caught off guard as you move farther into your run and that moving snow gains enough mass and force to push you around.

    Loose snow avalanches should be small in size but can still hurt if you’re carried into trees or other terrain traps in the runout below. Morning sun could trigger very small loose snow avalanches, especially below cliffy terrain.

    (12/10/2024)

    Small loose dry avalanches in small terrain mean you could get much bigger ones on a larger slope.

    Photo: Julz Holder - Grounding Truth

  • Wind Slabs

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

    Winds will slack off overnight, but plenty of wind slabs will remain from Friday's wind and snowfall. They may be hard to identify, with up to a foot of soft snow hiding signs of wind transport.

    Use a ski pole or your hand to probe for dense, wind-drifted snow beneath the softer surface layer. Test slopes can be useful, but they must be performed in representative terrain, which may be challenging to identify when signs of wind transport are partially obscured.

    The easiest way to avoid the problem is to steer clear of steep, leeward slopes just below ridgelines and cornices, wind-loaded convex rollovers, and unsupported terrain around cliffs and gullies.

    (2/14/2023)

    Soft snow that falls with minimal wind can obscure obvious signs of earlier wind transport.

Avalanche Discussion

West Central has picked up between 12 and 24 inches of new snow in the last 24 hours, with a bit more on the way overnight. Cold temperatures through the weekend mean it may take longer for wind slab instabilities to settle and gain strength. There should be plenty of terrain where you can travel with minimal risk and enjoy good riding conditions on Saturday. The challenge will be identifying steep, wind-loaded features where it is still entirely possible to trigger an avalanche. When uncertainty rises, pick less consequential terrain.

A handful of human-triggered avalanches were reported on Friday in West North. Avalanche control work produced a large, hard slab avalanche on a wind-loaded slope (photo). Another smaller avalanche (D1.5) was triggered on a very steep slope on the north side of Table Mountain. Small loose snow avalanches and active wind transport—but no slab avalanches—were reported from Stevens Pass.

State and local resources are working diligently to reduce the impacts of destructive storms that occurred earlier this month. We can help by respecting affected communities, complying with road closures, and adhering to ski area uphill travel policies.

Regioni coperte