Bulletin d’avalanche

South Rockies

Apr 9, 2017Avalanche Canada
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Archivé · expiré 9 years ago

Danger d’avalanche

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

Cornices are the primary concern. Solar radiation is a common cornice trigger. Limit your exposure when it's cloudy and completely avoid cornices when it's sunny.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    New snow and moderate southwest winds have formed thin wind slabs below alpine ridgetops.

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    Solar radiation is a common cornice trigger. Limit your exposure when it's cloudy and completely avoid cornices when it's sunny.

Confidence

High -

Weather Forecast

SUNDAY: Mix of sun and cloud with isolated flurries. Light southwesterly ridgetop winds. Freezing level around 1700 m.MONDAY: Mix of sun and cloud. Light southwesterly ridgetop winds. Freezing level around 1800 m.TUESDAY: Mostly cloudy. Light southwesterly ridgetop winds. Freezing level around 1800 m.

Avalanche Summary

Several loose wet avalanches to size 1.5 were reported in this region on Friday.

Snowpack Summary

10 cm of new snow with strong, southerly winds have created small wind slabs in lee features below alpine ridgetops. A surface crust up to 2300 m. will break down with daytime warming. Cornices remain large, looming, and are best avoided. The snowpack is well settled and continues to transition into a spring snowpack, becoming isothermal at treeline in some areas and below treeline in most areas. The bottom third of the snowpack is composed of weak facets, but this deep persistent weakness has not been reactive for several weeks. However, a large trigger, like a cornice, or rapid warming of the snowpack could potentially trigger this layer.

Régions couvertes