Bulletin d’avalanche

Northwest Coastal

Mar 3, 2017Avalanche Canada
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Archivé · expiré 10 years ago

Danger d’avalanche

Fri
Sat
Alpin
4 · Fort
Limite forestière
4 · Fort
Sous la limite
3 · Marqué
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Points saillants

Heavy snowfall and strong winds continue to drive the avalanche danger to HIGH.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely - Very Likely
    Taille
    1–3
    Fresh storm slabs are reactive and likely have a poor bond to the old snow surfaces. Deeper deposits of wind slab may also exist on leeward slopes and behind terrain features.

Weather Forecast

Friday: Cloudy with snow amounts 5-10 cm. Ridgetop winds light with strong gusts from the SW. Alpine temperatures near -5 and freezing levels 500 m.Saturday: Mix of sun and cloud. Ridgetop winds light from the South and alpine temperatures near -7.Sunday: Cloudy with sunny periods and possibly a trace of new snow. Ridgtop winds light and alpine temperatures near -8.

Confidence

Moderate - Timing, track, or intensity of incoming weather system is uncertain on Friday

Avalanche Summary

On Wednesday, numerous natural slab and loose dry avalanches up to size 2 were reported from across the region. Natural avalanche activity may start to taper off on Friday but avalanche problems remain primed for human triggering through the forecast period.

Snowpack Summary

Recent storm snow 40-100 cm has buried a variety of old snow surfaces including surface hoar, facets, crusts, stiff wind slab and a melt/ freeze crust below 1600 m. The deeper storm snow amounts exist in the Shames/ Terrace area with less accumulations further North and East. The new snow will likely have a poor bond to these older surfaces. Below this layer, the snowpack is generally settled and strong with the exception in shallow snowpack areas around Bear Pass and Ningunsaw where basal facets remain an ongoing concern.

Régions couvertes