Bulletin d’avalanche

Northwest Coastal

Jan 24 – 25, 2012Avalanche Canada
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Archivé · expiré 15 years ago

Danger d’avalanche

Thu
Fri
Alpin
4 · Fort
Limite forestière
4 · Fort
Sous la limite
4 · Fort
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Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Very Likely
    Taille
    3–6
    The new storm is expected to continue to build windslabs in the alpine and at treeline due to very strong southwest winds and heavy precipitation.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Very Likely
    Taille
    3–7
    The new storm will add to the storm slab that is sitting above a weak layer that developed during the recent cold weather. Forecast warm temperatures may consolidate this blanket of snow into a cohesive slab that is easily triggered.

Confidence

Good - -1

Weather Forecast

The storm will continue to bring heavy precipitation and strong to very strong southwest winds for the forecast period. High freezing levels from Tuesday are expected to drop back to valley bottoms by Wednesday morning.

Avalanche Summary

A couple of natural size 2.0 avalanches were reported on steep NE and SE aspects at and below treeline. Explosive control produced a low elevation avalanche size 2.0 on a south aspect, and a size 3.0 avalanche at 1250 metres on a south aspect. We are not sure what depth or sliding surface the size 3.0 released.

Snowpack Summary

Heavy snowfall and strong southwest winds are building new windslabs and storm slabs above the recent storm snow that has consolidated into a slab. The old windslabs are on south through west aspects, and they are stiff and continue to be easily triggered. New windslabs are building on north through east aspects, making travel a bit tricky; limited options exist for avoiding both types of windslab. The deep snowpack is considered to be well settled with no persistent layers of concern.

Régions couvertes