Bulletin d’avalanche

Northwest Coastal

Jan 9 – 10, 2015Avalanche Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

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

Points saillants

Conditions are improving, but windslabs remain a concern at treeline and above.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Wind loaded slopes remain a concern at treeline and above.
  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–6
    Weak layers still exist in the mid snow pack and rider triggering is possible. Cornice failures and small avalanches may produce a larger avalanche.

Confidence

Good - Forecast snowfall amounts are uncertain on Saturday

Weather Forecast

Freezing levels will remain at the valley bottom for the next few days. A pulse of Pacific moisture will move onshore this afternoon and evening, bringing 2 to 5 cm of precipitation to the area. Some low lying areas may see freezing rain as the system moves onshore. A ridge of high pressure will rebuild over the interior of the province briefly and another Pacific frontal system should arrive on the north coast early in the week bringing rising temperatures and more precipitation.

Avalanche Summary

On Thursday, several size 1.5 explosive controlled avalanches were reported. Reports of natural avalanche activity have diminished, but the potential for human triggering is still a concern.

Snowpack Summary

Storm snow amounts vary across the region. Some southern areas received close to 1m of new snow and northern areas probably around half that. Strong winds have redistributed large amounts of the recent storm snow and rain in some areas has produced a surface crust layer that will be of concern with future snow loading. A buried surface hoar layer in the mid-snowpack is still on the radar in northern sections like Bear Pass and Ninginsaw Pass. The mid December crust can also be found in the middle of the snowpack and is sandwiched with facets and surface hoar. The November crust down near the bottom of the snowpack is generally well bonded but may be reactive in some locations..

Régions couvertes