Bulletin d’avalanche

Northwest Coastal

Nov 27 – 28, 2014Avalanche Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
Sans niveau
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Points saillants

Invading Arctic air will result in cold and dry conditions. Expect very strong outflow winds in coastal inlets and valleys.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    Outflow winds could strip snow from windward slopes and build dense or hard wind slabs in exposed lee terrain, possibly at all elevations. 

Confidence

Poor - Due to the number of field observations

Weather Forecast

Friday: Mainly sunny but cold. The freezing level is at valley bottom with temperatures around -18 at treeline. Winds are moderate or strong from the E-NE. Saturday: Mainly sunny. Temperature increase with average treeline temps near -10. Winds are moderate from the north. Sunday: Increasing cloud with flurries developing near the coast. Treeline temperatures are around -7. Winds switch to light or moderate from the SW.

Avalanche Summary

A few small explosive triggered wind slab avalanches were reported north of Stewart on Wednesday. These slides were from northerly aspects near treeline and were up to 40 cm deep. We have had no reports from popular recreational spots in the region. Let us know what you are seeing at [email protected].

Snowpack Summary

As we begin our forecasting season, we are working with limited information from the field. Early reports suggest there's enough snow for avalanches at alpine and some treeline elevations. Recent snow has likely been redistributed by gusty and variable winds into slabs on lee slopes at alpine and treeline elevations. This snow may overlie a weak old snow surface (surface hoar, facets and/or a crust) which developed during November's dry spell. Check the bond of the snowpack at this level and take a cautious approach as new snow builds deeper above this layer.

Régions couvertes