Avalanche Forecast
Issued: Jan 3rd, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Persistent Slabs.
Aaron Beardmore,
Forecasters are still uncertain about the Dec 2 crust layer and how/if it will react, especially in Kootenay. Dig down and test this layer locally before committing to a line. Ski quality is excellent in sheltered areas.
Summary
Weather Forecast
Only a few cm's of snow overnight accompanied by a drop in temperature once again. Expect valley temps in the -15 range and at the ridge closer to -20. Wind is forecasted to remain in the strong range from the SW but it will subside to light by midday tomorrow.
Snowpack Summary
Up to 20cm storm snow in the last 2 days. The wind has eased however, wind slabs are present in lee areas of the alpine and some treeline locations. 50-70 cm over the Dec 2 crust/facet combo which exists below 2200 m. Shallow snowpack areas (<100cm) have weaker basal facets. Snowpack depths at treeline are from 120-160 cm.
Avalanche Summary
Both Sunshine and Lake Louise ski patrol reported ski cutting very small windslabs that might not even amount to a size 1. Otherwise no avalanches observed or reported.
Confidence
Due to the number and quality of field observations on Monday
Problems
Wind Slabs
Previous strong SW winds have created wind slabs in alpine and exposed treeline lee areas. These have been a bit more stubborn than expected but could still be triggered by skiers in steep terrain, especially in the alpine.
- Watch for surface cracking and stiffer surface layers of snow. Avoid wind loaded terrain.
- Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
Aspects: North, North East, East, South East, South.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
The Dec. 2 crust/facet layer down 50-70 cm has not been a widespread problem, but uncertainty remains with the layer. Monitor carefully if you are looking at steep committing terrain.
- Be cautious with steep or unsupported slopes.
Aspects: All aspects.
Elevations: Treeline, Below Treeline.
Likelihood
Expected Size
Valid until: Jan 4th, 2022 4:00PM
