Avalanche Forecast
Issued: Dec 17th, 2012 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.
mike eder,
Parks Canada
Summary
Weather Forecast
The weather is expected to be high clouds with sunny periods and no snow accumulations in the next few days. A frontal system will pass South of Jasper on Wednesday and Thursday, while arctic air may arrive from the North in the forecast area bringing cooler temperatures by mid week.
Snowpack Summary
There is a variety of hard slabs and soft slabs on exposed ridge features and cross loaded gullies in the alpine and tree line. A breakable 10cm wind slab does not propagate and is bonding well to the old snow surface. Below tree line, there is 10cm + of fresh snow over a supportive mid pack above 1900 meters in sheltered glades.
Avalanche Summary
No new avalanches have been observed since Monday Dec 10. Wind slabs appear to have bonded well to the old snow surface. The raincrust laminate down in the lower 1/3 of snowpack is deteriorating into a FC layer and does not respond to a compression test. Test results do show non planar collapses in the basal facets.
Confidence
Due to the number and quality of field observations
Problems
Wind Slabs
Aspects: North, North East, East, South East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Deep Persistent Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 18th, 2012 4:00PM
