Bulletin d’avalanche

Banff Yoho Kootenay

Apr 8 – 9, 2012Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Tue
Wed
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

A good freeze tonight, but solar warming will be an issue Monday. A big warming trend is forecast for Tues/Wed. with freezing levels to 3000+m, which will drastically raise the hazard. Start and end your trips early in the day. SH

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Wind slabs can still be initiated around the lees of ridge crests, convex features, and where they sit on a sun crust. These are becoming more isolated as they settle out, but recent activity shows they are still possible to trigger.
  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    The transition to spring means loose wet slides on solar aspects. Expect an increase in this activity over the next few days as freezing levels rise, meaning they will start earlier in the day, not just the afternoon.
  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–3
    The basal facets and Valentines surface hoar are still causing isolated slides almost daily. Click the facebook link to see a photo of a skier triggered slide in the Lake Lousie backcountry. Large cornice drops have awoken these layers as well.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Freezing levels are uncertain on Tuesday

Régions couvertes