Bulletin d’avalanche

Banff Yoho Kootenay

Dec 10 – 11, 2012Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

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

Strong wind in the alpine is creating slabs in lee areas. Carefully consider the consequences of traveling in these areas tomorrow (Monday).

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Strong winds on Sunday have created soft and hard slabs in lee areas in the alpine.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - 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

Warming temperatures combined with a clearing trend should provide an opportunity for the danger rating to drop back down to  moderate by the end of the day on Monday.

Snowpack Summary

The snowpack is surprisingly well settled for early December. Expect to find approx 15cm of low density snow sitting on top of of a well settled mid-pack, all of which is sitting on top of the Nov 6 crust 20-40cm above the ground. Snowpack tests today showed irregular results in the hard range on the Nov 6 crust in our Bow Summit study plot. 

Avalanche Summary

No new avalanche activity observed or reported today. However, there have been reports and observations of avalanches up to size 3 throughout the forecast region in the past 4 days. It is suspected that many of these large avalanche released on the Nov 6th crust.

Confidence

Régions couvertes