Avalanche Forecast
Issued: Dec 3rd, 2020 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Persistent Slabs.
Jasper Snow Safety,
Highly wind effected snowpack in the alpine and exposed treeline make finding soft turns difficult but the views are world class.
Summary
Weather Forecast
Friday will bring cooling temperatures with ridgetop winds becoming light from the west. High pressure with mild temperatures remaining in place through the weekend with freezing level reaching 2200m Saturday.
Snowpack Summary
Previous winds have stripped the snow from all fetch in the alpine and open tree line creating slabs and crossloading gullies and depressions. Soft snow can still be found in specific sheltered locations at tree line and below. Snow depth at tree line is around 90cm with the Nov 4 crust down 50cm. Solar crust present steep SW terrain.
Avalanche Summary
Evidence of avalanche cycle from yesterday's temp inversion and solar input on specific steep and extreme SW alpine terrain - moist loose and slab up to size 2.
Confidence
Problems
Wind Slabs
Widespread wind effect in the alpine and exposed treeline - highly variable with laminated slabs and bare ground. Be cautious of unsupported slabs.
- If triggered the wind slabs may step down to deeper layers resulting in larger avalanches.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
The Nov. 4 is down about 50cm at tree line (2000m) and breaking down. Be careful around "thin to thick" areas where deep slabs could be triggered.
- Be cautious in shallow snowpack areas where triggering is more likely.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 4th, 2020 4:00PM
