Bulletin d’avalanche

Northwest Coastal

Apr 11 – 12, 2012Avalanche Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

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

Field observations are limited for this region. Send us yours! [email protected]

Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–5
    Overhead hazards including cornices and ice cliffs can act as a heavy trigger for very large avalanches on the slope below.

  • Wet Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–5
    Warm temperatures or rain may continue to weaken surface snow, especially below treeline. Wet slides can push you around, entrain mass and become surprisingly large. Also, avoid traveling on or underneath any slopes which sport glide cracks.

Confidence

Fair - Intensity of incoming weather is uncertain

Weather Forecast

Thursday: A mix and of cloud and light precipitation. Freezing level around 1500 m. Light southerly winds.Friday: Cloud or light precipitation, dissipating. Light winds. Freezing level around 1500 m. Saturday: Clearing skies. Light south-westerly winds. Freezing level 1500 m.

Avalanche Summary

Recent reports include wet loose avalanches up to size 2.5 in response to warming and sunshine. Large glide avalanches were also reported. On Saturday, a size 3 glide release removed trees and left a 4-5 m deep deposit near Shames. Last week, a large icefall triggered a slab in the Bear Pass area, creating a size 4 avalanche.

Snowpack Summary

Cornices and icefall are an increased concern now that spring is upon us. A melt-freeze crust exists on solar aspects and at low elevations. In some areas, limited overnight cooling has kept surface snow from re-freezing, leaving it loose and cohesionless. Forecast rainfall at low elevations may keep the snow surface weak. Pockets of dry snow and surface hoar may still be found on high north aspects. Areas of wind slab formed with recent easterly outflow winds. Glide cracks have opened up and pose the threat of full-depth releases, especially on steep rocky terrain features.

Régions couvertes