Bulletin d’avalanche

Northwest Inland

Jan 10 – 11, 2013Avalanche Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

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

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Be alert for new wind slabs behind terrain breaks such as ridges, ribs and gully walls.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–5
    A deeply buried facet/crust weakness exists near the base of the snowpack. This layer could be triggered by large loads such as a cornice collapse or from a thin-spot trigger point.

Confidence

Poor - Due to limited field observations

Weather Forecast

Friday: Light NW wind, changing to moderate SW late in the day. Alpine temperature near -8. 5 cm snow, late in the day.Saturday: Moderate NE wind. Alpine temperature near -7. No snow.Sunday: Light W wind. Alpine temperature near -7. Very light snow.

Avalanche Summary

Snowmobilers witnessed naturally-triggered slabs and loose dry sluffs in the Seaton Basin on Monday. No avalanches have been reported since then.

Snowpack Summary

Up to 25 cm of recent snow is sitting over a weak, faceted old snow surface, which is causing loose dry sluffing in steep terrain. In wind-affected areas, wind slabs have formed behind terrain breaks such as ridges and ribs. A strong mid-pack overlies a weak base layer of facets and the remnants of a crust.

Régions couvertes