Bulletin d’avalanche

Boundary

Dec 5 – 6, 2025Avalanche Canada
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Archivé · expiré 10 months ago

Danger d’avalanche

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

Points saillants

Slopes sheltered from the wind could still hold good riding and lower avalanche danger.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2

    Recent snow and moderate to strong south through west wind has created wind slabs on leeward and cross-loaded slopes.

    Retreat to mellower terrain if you find signs of instability like shooting cracks, or recent avalanches.

Confidence

Low

Avalanche Summary

On Wednesday, west of Bell II, several large (up to size 2.5) glide slab avalanches were reported.

On Tuesday, north of Stewart, a small vehicle triggered wind slab avalanche was reported. Also, numerous small (up to size 1.5) loose dry avalanches were reported below 1500 m, and small (up to size 1.5) wind slab avalanches in northerly alpine terrain.

If you are getting out in the backcountry, consider making a post on the MIN (Mountain Information Network).

Snowpack Summary

Up to 25 cm of recent snow and moderate to strong southeast through west wind may have formed reactive wind slabs on leeward slopes. Expect to find soft snow in sheltered areas. A layer of weak, feathery crystals may be found under the recent snow.

A 2 to 10 cm thick rain crust can be found down 50 to 100 cm at 1400 m and below. This layer is currently not an avalanche concern.

At treeline we expect a snow depth of 250 cm or more. Snowpack depth tapers with elevation to around 50 cm at valley bottoms. Many early season hazards are just below the surface below treeline.

Weather Summary

Thursday Night
Mostly cloudy. 10 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 700 m.

Friday
Mostly cloudy. 10 km/h variable ridgetop wind. Treeline temperature -5 °C. Freezing level 300 m.

Saturday
Cloudy. Up to 10 cm of snow. 30 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 400 m.

Sunday
Cloudy. 10 to 25 cm of snow. 30 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 300 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • If you are increasing your exposure to avalanche terrain, do it gradually as you gather information.
  • Shooting cracks, whumpfs, and recent avalanches are strong indicators of an unstable snowpack.
  • Be cautious of buried obstacles, especially below treeline.

Régions couvertes