Bulletin d’avalanche

Banff Yoho Kootenay

Mar 11 – 12, 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
3 · Marqué
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Points saillants

In the last 24 hrs, 10-20 new in the forecast area with moderate-strong SW wind, and rain up to 1500 m. We should see a slight improvement with a cooling trend starting Sunday afternoon. The deeply buried surface hoar is still a concern. LP

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Wind slabs have become less reactive and have bonded somewhat with the warm temperatures. We are still gathering information on this layer, and expect it still may be reactive on lee features .Over the past week we have had strong SW & NW wind.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    2–4
    The Valentine surface hoar down 60-100 cm and is overlain by a stiff slab. It's not as sensitive as it has been, but field tests today indicate it can be triggered by users. Still worth staying away from steeper terrain and don't lower your guard.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–4
    Avalanches triggered on the surface hoar have potential to step down to the basal facets in larger terrain features resulting in a very large avalanche.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Régions couvertes