Bulletin d’avalanche

Banff Yoho Kootenay

Jan 30 – 31, 2012Parks Canada
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Archivé · expiré 15 years ago

Danger d’avalanche

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

E

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    2–3
    Recent control in Yoho & field obs in Kootenay confirm the Jan 20 facet interface still active. 70-100 m sits over this layer. If a skier or cornice failure triggered a storm slab, it could step down to the facet interface & become a larger slide.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    This layer is of concern in thinner snowpack areas. In Kootenay yesterday, a skier triggered a 60 cm thick size 1.5 slab, propagated 50 m on a 35 deg, open wind affected slope. Skier was carried 150 m and lost their pole - thx for the report!

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    2–3
    Storm snow amounts vary from 35 cm West side of the Wapta, 20-25 - Sunshine, 20 - Lake Louise, and 15 - Bow Summit. Moderate to strong west winds has created reactive touchy slabs. Expect sizable sluffs off cliffs with ongoing strong winds tomorrow.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Due to the number of field observations

Régions couvertes