Bulletin d’avalanche

Northwest Coastal

Jan 12 – 13, 2016Avalanche Canada
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Archivé · expiré 11 years ago

Danger d’avalanche

Thu
Fri
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
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Points saillants

If you wake up with more than 20cm of new snow on the ground, or if the snowfall becomes intense during the day avalanche danger may be higher than advertised.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    2–4
    I expect a storm snow to develop through the day. This slab is sitting above a complex snowpack with several buried weak layers. I would tread lightly until we get a good feel for how the snowpack is reacting to the new snow.

Confidence

Moderate - Timing, track, or intensity of incoming weather system is uncertain

Weather Forecast

Moderate snowfall is expected to continue through until Thursday. Shames could see up to 20cm of storm snow by Wednesday morning with another 10cm through the day and 10cm overnight. Coastal regions should receive slight more, and northern areas slightly less than this. Isolated flurries are forecast for Thursday. Friday will be mainly cloudy with no significant precipitation expected. Winds will be moderate from the southwest Wednesday but should drop to light by Thursday. The freezing level will remain fairly steady between 1500m and 1000m.

Avalanche Summary

We've receive reports of several natural and skier triggered avalanches ranging from size 1-2 from across the region. It sounds like the surface hoar could be starting to wake up!

Snowpack Summary

Up to 15 cm of new snow now covers a widespread layer of surface hoar. Bellow this the upper 100cm consists of at least 3 other distinct buried weak layers of surface hoar, faceted snow, and possible thin sun crusts on some solar aspects. These deeper weak interfaces continue to produce variable results in snow pack tests. Although they appear to be gaining strength they're worth keeping on your radar a little longer. Recent strong southerly winds have formed fresh soft slabs in lee and cross-loaded terrain.

Régions couvertes