Bulletin d’avalanche

Lizard-Flathead

Dec 1 – 2, 2022Avalanche Canada
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Archivé · expiré 4 years ago

Danger d’avalanche

Sat
Sun
Alpin
4 · Fort
Limite forestière
4 · Fort
Sous la limite
3 · Marqué

Points saillants

The storm continues! Avoid avalanche terrain, natural slab avalanches are expected on all aspects at all elevations.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Very Likely - Certain
    Taille
    1–2.5

    Heavy snowfall is forecast and amounts could accumulate to 45 cm plus by Thursday afternoon. Natural storm slab avalanches are likely. Storm slabs may scrub down to a deeper and faceted snowpack, initiating larger-than-expected avalanches.

Confidence

High

Avalanche Summary

On Thursday a widespread natural avalanche cycle is expected.

Leading up to Thursday human triggered avalanches using explosives were reported up to size 2.

Snowpack Summary

Upper Snowpack: Heavy snowfall amounts are forecast through Thursday afternoon building widespread fresh and reactive storm slabs. This brings over 60 cm+ of snow over a layer of surface hoar.

Lower Snowpack: Sugary faceted snow with a rain crust just above the ground.

Snowpack depths at treeline are 45 to 75 cm, and in the alpine 65 to 125 cm.

Matt and Connie's video paints a better picture of the snowpack than I can with words. Check it out! And here's their MIN report with a graphed profile.

Weather Summary

Wednesday NightPossible enhanced snowfall amounts 20-35 cm new snow, strong southwest wind, temperatures near -15. Freezing level valley bottom.

Thursday5-15 cm through the day, strong southwest wind and temperatures near -12.

Friday

A mix of sun and clouds, moderate southwest wind and colder temperatures persist -15 to -20.

Saturday

Cloudy with light snow amounts, moderate southwest wind and temperatures warming slightly to -8.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid all avalanche terrain during periods of heavy snowfall.
  • Be aware of the potential for larger than expected storm slabs due to the presence of buried surface hoar.

Régions couvertes