Bulletin d’avalanche

Northwest Inland

Dec 19 – 20, 2015Avalanche Canada
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Archivé · expiré 11 years ago

Danger d’avalanche

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

Forecast light snow combined with wind will continue to develop thin new windslabs at higher elevations.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Thin new windslabs may continue to develop with each snow and wind event. Watch for old buried windslabs that may now be exposed to new winds or reverse loading.

Confidence

Moderate - Intensity of incoming weather systems is uncertain on Sunday

Weather Forecast

3-5 cm overnight with strong southwest winds and freezing levels at valley bottoms. Temperatures around -10 at treeline. Light flurries and moderate westerly winds during the day Sunday with a chance of broken skies in the afternoon. High cloud with a few flurries on Monday with light southwest winds. Light southeast winds on Tuesday with a few light flurries.

Avalanche Summary

No new avalanches reported. Incremental loading should develop thin new wind slabs on lee aspects.

Snowpack Summary

A trace of new snow overnight has not changed the conditions. Shallow early season conditions continue with 80-100 cm at treeline in the south and west of the region, and closer to 60 cm in the east. Stiff wind slabs have been reported above treeline in the lee of variable and changing winds. The winds were out of the northeast in areas under the influence of arctic air, and out of the south or southeast when the snow moved across from the coast. The surface hoar reported last week is variable in its distribution and may be hard to find. Weak basal layers may exist in shallow snowpacks that have experienced continuous cold temperatures.

Régions couvertes