Bulletin d’avalanche

Kananaskis

Mar 11 – 12, 2017Alberta Parks
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Archivé · expiré 10 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

Wind, new snow and warm temps have created new windslabs in the last 24 hours.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    There are multiple layers of slabs out there. It's hard to identify just one as a problem. Recognize that it is possible for a small surface slab to start a chain reaction that could go all the way to the bottom of the snowpack.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–4
    Similar to the windslab problem, these deeper layers consist of many weak layers being lumped together into a single problem. The take home point is the fact that they are near the bottom of the snowpack and any avalanche involving them will be big!

Confidence

High -

Weather Forecast

The strong westerly winds will continue overnight. Alpine temps will fall to the -7 range. Tomorrow will have isolated flurries with no significant accumulation. The winds will be 30-40km/hr from the west. While not part of our forecast, its worth mentioning the solar radiation is noticeable these days. Expect clear skies or thin cloud to have an impact on southerly exposures.

Avalanche Summary

Nothing from the last 24hrs.

Snowpack Summary

Moderate to strong SW winds have contributed to new, alpine windslabs on N-S aspects. Fortunately these are easy to spot and predict in terms of location. In terms of "triggerability", it felt as though these could be easily triggered in steep, convex terrain. Treeline also had these slabs, however they were limited to wind exposed areas. For the deeper layers, the situation is still the same as it has been. To make a long story short, the deeper layers are widespread and very difficult, if not impossible to trust. Below treeline the warm temps made for moist, sticky snow that will form a thin crust overnight.

Régions couvertes