Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible - Likely
- Size
- 1–2
Wind affected features may remain reactive to human triggers, especially where they sit over a smooth crust.
Avalanche forecast
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Dec 22 – 23, 2025Avalanche Canada
Archived · expired 9 months ago
Avalanche danger
Wed
Thu
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
1 · Low
Highlights
Watch for changing conditions as you shift elevation and aspect - wind affected features may remain reactive to human triggers.
Avalanche problems
Confidence
Moderate
- Uncertainty is due to the limited number of field observations.
- Uncertainty is due to the speed, direction, or duration of the wind and its effect on the snowpack.
Avalanche Summary
On Saturday, wind slabs to size 2 were exposively triggered on north and easterly aspects at treeline and above.
Snowpack Summary
50 to 70 cm of recent snow combined with strong southwest winds have formed slabs overlying a 5 to 20 cm thick crust.
Below the crust, the snowpack is generally well settled and moist to the ground in most areas.
Weather Summary
Sunday Night
Mostly cloudy. 5 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -6 °C. Freezing level 400 m.
Monday
Mostly cloudy. 1 to 2 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -7 °C. Freezing level 1000 m.
Tuesday
Mostly cloudy. 1 to 5 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1100 m.
Wednesday
Mostly cloudy. 10 to 20 cm of snow. 40 km/h south ridgetop wind. Treeline temperature -2 °C. Freezing level 1100 m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Closely monitor how the new snow is bonding to the crust.
- Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.