Bulletin d’avalanche

Kananaskis

Jan 14 – 15, 2017Alberta Parks
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Archivé · expiré 10 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Despite the Moderate hazard rating, forecasters are treating large Alpine features with caution due to the deep persistent weak layers.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Snow and wind over the past week have created wind slabs up to 30cm thick immediately below ridge crests on all aspects. These slabs are on all aspects as a result of the Northerly flow this past week.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–3
    More likely to be triggered from thinner areas and step down to the basal facets and involve the entire winters snowpack.

Snowpack Summary

Variable depth wind slabs are found in Alpine terrain along ridgelines and in cross-loaded gully features. Snowpack tests today indicate failures in the moderate range down 35cm, as well as on the Nov crust layer buried deeply in the snowpack. Much of the snowpack is very weak and facetted, especially at lower elevations. Any avalanche that is initiated in the upper snowpack will likely step down and involve the entire snowpack.

Confidence

High -

Weather Forecast

Sunday will be cloudy with sunny periods and no precipitations. Temperatures should be fairly mild with moderate westerly winds. A system is approaching that could bring some snow to us on Tuesday.

Avalanche Summary

One new slab avalanche observed today on an East aspect in the Alpine. This slide was naturally triggered and appears to have occurred in the past 24hrs. The fracture line was up to 100cm deep.

Régions couvertes