Bulletin d’avalanche

Crowsnest North

Dec 17 – 18, 2025Avalanche Canada
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Archivé · expiré 10 months ago

Danger d’avalanche

Fri
Sat
Alpin
4 · Fort
Limite forestière
4 · Fort
Sous la limite
3 · Marqué
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Points saillants

Avoid avalanche terrain.
Heavy snowfall and wind have likely built dangerous storm slabs.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–3

    A crust buried deep in the snowpack has proven reactive to large loads, particularly in steep, exposed terrain.

  • Storm Slabs

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

    Intense snowfall and strong wind is expected to build storm slabs overnight and into the day.

Snowpack Summary

Up to 15 cm of snow has been blown around by strong winds and sits on a widespread melt–freeze crust, which is likely everywhere except high-alpine terrain.

A mid-November crust is buried 50 to 100 cm deep. Beneath it, the snowpack contains several additional crusts, and in some locations, a weak, sugary facet layer near the ground.

At treeline, snow depths range from roughly 50 to 100 cm, tapering off quickly at lower elevations.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported this week. However, information is limited.
It's expected that natural avalanches will occur on Wednesday following the intense storm.

Weather Summary

Tuesday Night
Cloudy. 25 cm of snow. 60 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1800 m.

Wednesday
Mostly cloudy. 10 cm of snow. 70 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level 1400 m.

Thursday
Mostly cloudy. 2 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -7 °C.

Friday
Mostly cloudy. 5 to 10 cm of snow. 30 to 60 km/h southwest ridgetop wind. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid avalanche terrain during periods of heavy snowfall.
  • Be aware of the potential for large avalanches due to buried weak layers.
  • Avoid exposure to overhead avalanche terrain; avalanches may run surprisingly far.

Régions couvertes