Bulletin d’avalanche

Banff Yoho Kootenay

Dec 11 – 12, 2012Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Tue
Wed
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Strong wind from the NW have created wind slabs in alpine lee areas. Human triggering is possible in these areas.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Strong wind from the NW have created wind slabs in the alpine. These wind slabs vary in thickness between 15 and 30cm.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    The Nov 6th crust should still be in the back of your mind. Recent avalanches on this layer combined with uncertain means of triggering make venturing out onto big open slopes a committing choice.

Weather Forecast

Subsiding wind, warming temperatures and a clearing trend will contribute to decreasing the danger rating from considerable to moderate over the next few days.

Snowpack Summary

Wind slabs of varying thickness have been developing on NE through SE aspects due to the moderate to strong wind. These wind slabs sit over top of a well settled mid pack and the Nov 6 rain crust. The Nov 6th crusts lies approximately 30cm from the ground.

Avalanche Summary

One size two avalanche was observed high on Bourgeau 8, above the Bourgeau Left ice climb. It is suspected to be a recently developed wind slab from todays wind event. No other avalanches were observed or reported. Photo of avalanche in Bourgeau 8.

Confidence

Wind effect is extremely variable on Monday

Régions couvertes