Avalanche Forecast
Issued: Dec 25th, 2024 4:00PM
The alpine rating is Wind Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeWatch for newly formed, reactive wind slabs as you transition into wind-affected terrain.
Summary
Confidence
Moderate
Avalanche Summary
Explosive control work, on the Alberta side of the region, produced wind slab avalanches up to size 1.5 on Monday.
No new avalanches were reported on Tuesday,
Looking forward to Wednesday, new snow and wind may form small but reactive wind slabs in lee areas.
Snowpack Summary
Up to 5 cm of new snow overlies wind-affected surfaces at the treeline and above. Hard wind slabs have formed in lee and cross-loaded terrain.
In the upper snowpack, a melt-freeze crust and facets exist, particularly in south-facing terrain. Winds likely have scoured recent snow, leaving the crust exposed on the surface in exposed areas.
Snowpack depth varies significantly across the region. Windward slopes may have as little as 50 cm of snow, while leeward slopes could have up to 200 cm
Weather Summary
Wednesday Night
Mostly cloudy with isolated flurries. 30 to 60 km/h southwest ridgetop wind. Treeline temperature -8 °C.
Thursday
Cloudy with up to 5 cm of new snow. 30 to 90 km/h southwest ridgetop wind. Treeline temperature -5 °C.
Friday
A mix of sun and cloud with isolated flurries. 15 to 30 km/h southwest ridgetop wind. Treeline temperature -7 °C.
Saturday
Cloudy with up to 5 cm of new snow. 30 to 60 km/h southwest wind. Treeline temperature -3 °C.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Avoid areas where the snow feels stiff and/or slabby.
- Use ridges or ribs to avoid areas of wind-loaded snow.
- Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.
Problems
Wind Slabs
New snow accompanied by strong southwest wind may form fresh wind slabs in lee and cross-loaded terrain.
Aspects: North, North East, East, South East, South, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 26th, 2024 4:00PM