Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible - Likely
- Taille
- 1–2
Up to 60 cm of recent snow and strong southwest winds continue to form wind slabs reactive to human triggers.
Bulletin d’avalanche
Voir sur la carteKootenay Boundary
Dec 21 – 22, 2025Avalanche Canada
Archivé · expiré 9 months ago
Danger d’avalanche
Tue
Wed
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
Points saillants
Keep your guard up at all elevations. Wind slab formation has been extensive and could extend into openings below treeline.
Problèmes avalancheux
Confidence
Moderate
- Uncertainty is due to the limited number of field observations.
Avalanche Summary
On Friday, several naturally triggered wind slab avalanches up to size 2.5 were reported on northerly aspects at treeline and above.
Snowpack Summary
40 to 60 cm of recent snow and strong southwest winds have formed slabs overlying a two to five cm thick crust.
The mid and lower snowpack are well settled with a series of crusts.
Weather Summary
Saturday Night
Cloudy with flurries. 5 to 15 cm of snow. 35 km/h southwest ridgetop wind. Treeline temperature -7 °C. Freezing level 1100 m.
Sunday
Mostly cloudy. 30 km/h south ridgetop wind. Treeline temperature -6 °C. Freezing level 1200 m.
Monday
Mostly cloudy with flurries. 5 to 15 cm of snow. 30 km/h south ridgetop wind. Treeline temperature -7 °C. Freezing level valley bottom.
Tuesday
Mostly cloudy. 10 to 15 cm of snow. 35 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level valley bottom.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Make conservative terrain choices and avoid overhead hazard.
- Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
- Keep your guard up at all elevations. Wind slab formation has been extensive and could extend into openings below treeline.
- Closely monitor how the new snow is bonding to the crust.