Bulletin d’avalanche

Northwest Inland

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

Danger d’avalanche

Wed
Thu
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Snowfall amounts will vary throughout the region. Pay close attention to how much snow fell in your area, and choose terrain accordingly.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–3
    Recent snowfalls accompanied by strong winds have created touchy conditions on lee slopes.  Cornices have been building and may also present a hazard.

Confidence

Fair - Due to the number and quality of field observations

Weather Forecast

Some clearing today and into Tuesday but by Wednesday, a Pacific low will deliver another round of moderate snowfall into the Northwest Inland area. bringing 10 to 20cm at upper elevations.  Ridgetop winds will decrease somewhat on Tuesday, and then ramp up to strong and southwesterly with the incoming system late Wednesday and into Thursday Freezing levels should hover around 1000m for the forecast period, dipping overnight Tuesday and Wednesday to adound400 m..

Avalanche Summary

There were a few recent reports of wind slabs to size 2 occurring on north and east-facing terrain at treeline and above. In addition, local skiers are reporting  activity on solar aspects.  With incoming storms, more wind slab development  ( and avalanches )  can be expected.

Snowpack Summary

10-20cm of snow and strong SW winds from the previous storm  built reactive wind slabs in exposed lee terrain. Snow and winds on Sunday have added size and destructive potential to the developing wind slab problem. There are a variety of interfaces including older wind slabs, hard crusts, surface hoar, and/or surface facets buried below the recent storms snow. At the base of the snowpack, weak facets may be found. Cornices are getting to be large and potentially unstable.  Solar aspects may become active in the afternoons.

Régions couvertes