Bulletin d’avalanche

Northwest Coastal

Feb 6 – 7, 2014Avalanche Canada
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Archivé · expiré 13 years ago

Danger d’avalanche

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

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Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Outflow winds have resulted in thin isolated wind slabs in leeward and cross-loaded features.  There has been minimal snow available for wind-loading so these winds slabs remain small and isolated, and the resulting hazard remains low.

Confidence

Fair

Weather Forecast

The ridge of high pressure persists for the forecast period. Cold and dry conditions continue.Friday/Saturday: Clear and sunny, treeline temperatures around -15 with colder temperartures in the valleys, mountain-top winds light-moderate variableSunday: Clear in the morning with increasing cloud cover through the day, treeline temperatures around -15 and the inversion should begin to break down, mountain-top winds moderate SW

Avalanche Summary

On Wednesday, a skier triggered size 1.5 wind slab avalanche was reported in the north end of the NW Inland region. This occurred on a convex roll feature on a NE aspect at 1800m elevation.

Snowpack Summary

Snow surface and upper snowpack conditions are quite variable but the common theme is that most areas are hard with very little ski penetration. The snow surface may consist of any of the following: (1) faceting snow (generally widespread due to current cold temperatures) (2) hard wind scoured and pitted surfaces at higher elevations (3) a thin wind crust or small isolated wind slabs on leeward or cross-loaded features(4) surface hoar in wind-sheltered areas (5) Thin melt-freeze crust(6) late-January crust down around 10cm is breaking down with facetingThe mid and lower snowpack are well settled and there are currently no layers of concern. However, in thinner snowpack areas, a weak basal layer of facets or depth hoar may still be a concern.

Régions couvertes