Bulletin d’avalanche

Kananaskis

Feb 6 – 7, 2017Alberta Parks
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Archivé · expiré 10 years ago

Danger d’avalanche

Tue
Wed
Alpin
4 · Fort
Limite forestière
4 · Fort
Sous la limite
3 · Marqué
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Points saillants

A large natural avalanche cycle is occurring. Avoid all avalanche terrain.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    2–4
    Triggering of these slabs from a thin weak area may cause an avalanche that involves the entire snowpack. With the recent additional snow load, triggering of these deeper layers is now more likely.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Very Likely - Certain
    Taille
    1–3
    Sluffing is occurring in steep terrain on all aspects and at all elevations.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Very Likely - Certain
    Taille
    1–3
    With up to 100cm of snow at Treeline in the past 72 hours, storm slab avalanches are almost certain to occur.

Confidence

Moderate -

Weather Forecast

The storm is coming to an end, and Tuesday will bring cloudy skies with sunny periods. Temperatures will remain cool with the temperature reaching a high of -19 °C. Wednesday should be a bit milder with more sun, and then a warm, windy and snowy day is expected on Thursday.

Avalanche Summary

Visibility was very limited today, but some natural avalanche activity was observed today in Alpine and Treeline terrain. One of the observed avalanches stepped down to the November persistent weak layer. We strongly suspect that a widespread avalanche cycle is occurring on all aspects and at all elevations.

Snowpack Summary

15 to 20cm of new snow in the past 24hrs brings storm snow totals to near 100cm at Treeline over the past 3 days. This storm snow sits on a previously formed dense wind slab in many parts of the forecast area. Widespread wind effect in Alpine and open areas at Treeline. Suspect significant wind slab development. Forecasters have a concern that the new load will cause failures in the deeply buried weak layers of Dec 18 and Nov 12, causing deep and destructive avalanches.

Régions couvertes