Bulletin d’avalanche

Purcells

Dec 3 – 4, 2025Avalanche Canada
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Archivé · expiré 10 months ago

Danger d’avalanche

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

Points saillants

Strong winds at upper elevations may have created pockets of wind slab 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
    Unlikely - Possible
    Taille
    1–1.5

    You may find pockets of wind slab at treeline and above. Watch for stiff, wind-loaded snow on ribs and gullies, especially where it sits over a weak, sugary layer near the base of the snowpack

Confidence

Low

Avalanche Summary

A small size 1 wind slab avalanche was reported from a north-facing slope at 2300 m. Check out this MIN REPORT for full details.

Snowpack Summary

At treeline and above, 3–8 cm of new snow sits on top of faceted snow or surface hoar. The upper snowpack is mixed: wind-affected in open areas and softer in sheltered spots, all resting on a crust from early November. Lower in the snowpack, there are several crusts, and in some areas a weak, sugary facets can be found near the ground.

Total snowpack depths are roughly 60 to 80 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 for avalanches.

Weather Summary

Tuesday Night

Mostly clear skies. 20 km/h west ridgetop wind. Treeline temperature -7 °C.

Wednesday

Mix of sun and clouds. 1 cm of snow at treeline. 20 km/h west ridgetop wind. Treeline temperature -7 °C.

Thursday

Mix of sun and clouds. 4 cm of snow at treeline. 30 km/h west ridgetop wind. Treeline temperature -6 °C.

Friday

Mix of sun and clouds. 1 to 8 cm of snow at treeline. 30 km/h west ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Carefully evaluate steep lines for wind slabs.
  • Be cautious of buried obstacles, especially below treeline.

Régions couvertes