Avalanche Forecast
Issued: Feb 20th, 2025 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Deep Persistent Slabs.
Avalanche Canada,
Avalanche Canada
Use extra caution in wind-affected terrain
Wind slabs have been sensitive to rider traffic due to underlying weak layers.
Summary
Confidence
Moderate
Avalanche Summary
On Wednesday ski cutting produced numerous size 1 wind slab avalanches. These avalanches were on north aspects at treeline and above, they were easy to trigger due to surface hoar beneath.
Snowpack Summary
By Friday morning up to 20 cm of recent storm snow may have fallen with southerly wind forming deeper deposits on northerly aspects. This recent snow will overlie a variety of surfaces including a layer of surface hoar in sheltered terrain and wind-affected snow or a crust in exposed terrain.
In sheltered terrain 40 to 70 cm of  faceted snow overlies a crust and layer of surface hoar from late January.
Another layer of surface hoar was buried near the middle of January and can be found 50 to 100 cm deep.
A weak layer of facets and a crust from early December varies in depth from 100 to 300 cm. This layer remains a concern in this region.
Weather Summary
Thursday Night
Cloudy with around 5 cm of snow. 20 to 40 km/h south ridgetop wind. Treeline temperature -3 °C.
Friday
Cloudy with around 5 cm of snow. 20 to 40 km/h southeast ridgetop wind. Treeline temperature -3 °C.
Saturday
Cloudy with 15 to 20 cm of snow. 30 to 50 km/h southeast ridgetop wind. Treeline temperature -2 °C.
Sunday
Mostly cloudy with 20 cm of snow. 20 to 40 km/h south ridgetop wind. Freezing level rising to 1400 m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Be mindful that deep instabilities are still present in the snowpack.
- Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
- Seek out wind sheltered terrain below treeline where you can avoid wind slabs and find great riding.
Problems
Wind Slabs
Expect fresh, reactive wind slabs to be forming as new snow accumulates with moderate to strong south and southeast winds.
In some areas this wind slab may be sitting on weak surface hoar or facets.
Aspects: North, North East, South West, West, North West.
Elevations: All elevations.
Likelihood
Expected Size
Deep Persistent Slabs
A weak layer buried 100 to 300 cm remains a concern.
Avoid shallow rocky areas where the snow transitions from thick to thin and triggering this layer is more likely.
If triggered the resulting avalanche would be very large and destructive.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Feb 21st, 2025 4:00PM
