Boletín de aludes

Kootenay Boundary

Feb 6 – 7, 2014Avalanche Canada
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Archivado · caducó 13 years ago

Peligro de aludes

Sat
Sun
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

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Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    Recent strong Easterly winds have created touchy windslabs in the alpine and below ridgetop at treeline which will most likely be prone to skier triggering. Loose dry avalanches are also a concern in steep areas at all elevations.

Confidence

Fair - Wind effect is extremely variable

Weather Forecast

Tonight and Friday: The ridge bringing cold and dry conditions is still present but is weakening. A weak disturbance over the region is generating a chance of precipitation overnight. Expect light to moderate NE winds and temperatures around -10 C.Saturday:  Sky is expected to clear again, light winds from the E and temperatures around -9 C.Sunday: Very similar situation is forecasted for Sunday except wind speed increasing from the NW.

Avalanche Summary

There has been several reports of skier triggered slab avalanches size 1 lee of recent Easterly winds and of loose dry avalanches in steep terrain.

Snowpack Summary

Recent strong E winds have scoured windward alpine faces and created hard windslabs on lee and cross-loaded features in the alpine and at treeline. The windslab problem is sticking around longer than usual because of the prolonged cold temperatures and because the windslabs are sitting on a widespread surface hoar layer or on a suncrust on S facing slopes. Hence, the windslabs or loose snow in sheltered terrain are still reactive to skier traffic. The mid snowpack is strong and supportive. Deeper persistent layers have become unlikely to trigger, although large and destructive avalanches are still possible in isolated terrain with the right input such as a cornice fall or a heavy load over a thin spot in steep terrain.

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