Bulletin d’avalanche

Kootenay Boundary

Dec 2 – 3, 2025Avalanche Canada
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Archivé · expiré 10 months ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible

Points saillants

New snow and strong upper-elevation winds may form fresh wind slabs that a person could trigger.

Assess steep slopes for dense or stiff snow before committing.

Problèmes avalancheux

  • Wind Slabs

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

    New snow and strong west ridgetop wind may build fresh and reactive wind slabs. These are likely to be found in isolated terrain features, such as directly lee of ridges, at upper elevations.

Avalanche Summary

On Sunday, explosive control was able to produce a 1.5 storm slab on a northwest aspect.

Confidence

Low

Snowpack Summary

Up to 10 cm of new snow is possible. This, combined with strong wind, may form fresh, small, and isolated wind slabs. The upper snowpack is variable, with wind-affected surface snow in open terrain and soft and faceted snow or surface hoar in sheltered areas. This overlies a crust that formed in early November. The lower snowpack consists of multiple crusts.

Total snowpack depths are roughly 80 to 120 cm, tapering quickly at lower elevations.

In many areas, especially below treeline, there is not enough snow to smooth out surface roughness or reach the threshold needed for avalanches.

Weather Summary

Monday Night

Cloudy with new snow 3 to 8 cm. 20 to 40 km/h gusty west ridgetop wind. Treeline temperature -9 °C.

Tuesday

Mostly cloudy with light flurries and some sunny periods. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -8 °C.

Wednesday

Cloudy with isolated flurries. 10 to 20 km/h west ridgetop wind. Treeline temperature -7 °C.

Thursday

Cloudy with snow 5 to 10 cm. 10 to 15 km/h southwest ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Make observations and continually assess conditions as you travel.
  • Be cautious of buried obstacles, especially below treeline.

Régions couvertes