Bulletin d’avalanche

Northwest Coastal

Feb 20, 2019Avalanche Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

The recent snowfall has likely been blown into lee terrain features from strong, variable wind. In sheltered areas, the recent snow may also need a bit more time to bond.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Upwards of 20 cm of new snow fell in the region with strong wind that was first southwest and more recently northeast. You may find touchy wind slabs in lee terrain features near ridges. The snow may also need time to stabilize in sheltered areas.

Confidence

High -

Weather Forecast

TUESDAY NIGHT: Clearing skies with isolated flurries, trace accumulation, light north wind, alpine temperature -6 C.WEDNESDAY: Mix of sun and cloud, light northeast wind, alpine temperature -6 C.THURSDAY: Increasing clouds over the day, light northwest wind, alpine temperature -6 C.FRIDAY: Cloudy with snowfall, accumulation 20 to 30 cm, moderate to strong southwest wind, alpine temperature -7 C.

Avalanche Summary

A few small (size 1) wind slab avalanches were observed on Monday.

Snowpack Summary

Tuesday's storm brought around 20 cm of snow, which fell onto a heavily wind-affected snow surface. The new snow may have formed touchy wind slabs quickly, as the storm had associated strong southwest to northwest wind. Beneath the new snow lies a variety of hard slabs, wind-pressed snow, sastrugi, and melt-freeze crust. In sheltered areas at and below treeline, the new snow may have fallen onto pockets of feathery surface hoar crystals and soft faceted snow. In the south of the region, the remainder of the snowpack is well-settled.Around Bear Pass and in the north of the region, you may find two weak layers of surface hoar buried between 50 and 100 cm. The base of the snowpack may also be composed of weak and sugary faceted snow.

Régions couvertes