Bulletin d’avalanche

Northwest Inland

Mar 12 – 13, 2019Avalanche Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Thu
Fri
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
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Points saillants

The snowpack needs to adjust to it's new load. The best, and safest riding will be in wind protected areas.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Where more than 20cm of snow fell, storm slabs are a concern, in part because the deeper sugary (faceted) snow below may prove to be the critical weak layer. Wind is starting to focus concerns toward wind slabs on lee slopes and crossloaded slopes.

Confidence

Moderate -

Weather Forecast

TUESDAY NIGHT: Light west wind.. Treeline temperatures around -10 C. Dry.WEDNESDAY: Light to moderate south wind. Mostly cloudy. Dry. Treeline temperatures -5 to -10 C. THURSDAY: Moderate to strong southwest wind. 5 to maybe 10 cm new snow. Treeline temperatures around -10 C. Mix of sun and cloud.FRIDAY:  Light to moderate south wind. Trace to 10 cm new snow. Warming temperatures with treeline approaching zero. Cloudy.

Avalanche Summary

Few observers in the field Monday but reports are consistent with a natural avalanche cycle of storm slabs and wind slab up to size 2.

Snowpack Summary

The region received 15 to 30 cm of storm snow accumulations on Monday. It covered previously scoured surfaces and old hard wind hammered snow, sun crusts on solar aspects, and sugary facets pretty much everywhere.February's cold weather weakened the upper- and mid-snowpack. In some sheltered areas, 20-50 cm of the snowpack was faceting, or sits on facets (sugary snow),In the south of the region, the lower snowpack is generally strong.

Régions couvertes