Bulletin d’avalanche

Northwest Coastal

Mar 20 – 21, 2015Avalanche Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

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

If you're heading to the north of the region, the snowpack changes. See the Forecast Details page for more info.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    New wind slabs have formed in response to wind and light snow accumulations on Friday. Watch for triggering in gullies and in the lee of ridge crests.

Confidence

Fair - Wind effect is extremely variable

Weather Forecast

Light flurries and a mix on sun and cloud are expected for the forecast period. Freezing levels are expected to sit between 1200m and 1400m. Winds should remain generally moderate from the southwest.

Avalanche Summary

On Thursday, explosives control triggered wind slab avalanches to size 1.5.No other recent avalanches were reported.

Snowpack Summary

New wind slabs have formed in high elevation lee terrain. These wind slabs overlie a variety of surfaces which include older wind slabs or melt-freeze crusts. Up to a metre below the surface you may find a hard crust which co-exists with facets, especially in the north of the region. Although reports suggest this layer has gained significant strength, I'd be wary of the possibility of isolated large avalanches on steep, unsupported slopes, especially if temperatures increase, or if solar radiation is strong. The mid-pack is generally well-settled and strong. At the base of the snowpack, weak facets may be found, particularly on shallow alpine slopes in the north of the region. Cornices are large and potentially fragile. Below treeline, the snow appears to be in a spring melt-freeze cycle.

Régions couvertes