Bulletin d’avalanche

Northwest Coastal

Mar 5 – 6, 2015Avalanche Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

Sat
Sun
Alpin
4 · Fort
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
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Points saillants

Snow! Finally! But also elevated avalanche danger. Play safe.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–4
    Recent snow and wind have left slabs which could be triggered naturally or by a person. These may include wind slabs lee to the SW, and storm slabs on other aspects.

Confidence

Fair - Forecast snowfall amounts are uncertain on Sunday

Weather Forecast

Snowfall tapers to light flurries on Friday and Saturday, before the next storm system arrives on Sunday, bringing moderate snow. Winds are moderate to strong throughout the period, switching from SW to NW on Saturday, and back to SW on Sunday. The freezing level climbs to near 1500 m ahead of Sunday’s storm but drops with the arrival of precipitation.

Avalanche Summary

At the time of writing, no avalanches have been reported, but I expect a natural cycle occurred today in response to snow and wind-loading.

Snowpack Summary

New snow and strong SW winds are likely to have built wind slabs on lee features, and storm slabs in more sheltered spots. These overlie a variety of interfaces including old hard wind slabs, a sun crust, a rain crust, surface hoar, and/or surface facets. At the base of the snowpack, weak facets may be found. Keep an eye out for cornices that could fail.

Régions couvertes