Bulletin d’avalanche

Northwest Coastal

Jan 18 – 19, 2012Avalanche Canada
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Archivé · expiré 15 years ago

Danger d’avalanche

Fri
Sat
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
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Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    2–5
    Strong winds out of the North - East associated with Arctic Air have formed widespread wind slabs. Watch for wind slabs & cross loaded slopes in wind exposed areas at all elevations. Choose travel routes carefully to avoid wind loaded snow.

Weather Forecast

More cold and dry air is on tap for Thursday as Arctic Air continues to affect the area. Light precipitation creeps in Friday and winds switch around to the S-SW which will warm things up a bit, Friday's forecast call for a high of -4. Moderate precip builds in Saturday and will continue through Sunday. Precip totals are a bit sketchy at this point, but these details will flush themselves out as we get closer to the weekend.

Avalanche Summary

A few natural slab avalanches to size 2 were noted on lee features in the alpine Tuesday.

Confidence

Fair - Timing, track, or intensity of incoming weather is uncertain

Snowpack Summary

Outflow winds have redistributed the low density snow from the last storm into widespread hard & soft slabs that can be found in the alpine and at treeline. In wind sheltered areas the storm snow has been bonding quite well to the old snow surface, but it's getting pretty tough to find wind sheltered areas with the recent onslaught of brutally cold arctic winds. A thin wind slab is being reported in wind exposed areas below treeline as well. Reverse winds continue to blow at moderate to strong speeds. These winds are still finding snow to pick up and move, meaning that slabs continue to build. Snowpack depths vary from 3.5 to 5 m across the region. In this part of the province, the mid-December surface hoar/facet combo layer is inactive as it's now 2.5 m below the snow surface. For the most part, avalanche concerns are limited to storm snow instabilities.

Régions couvertes