Avalanche Forecast
Regions: Jasper.
Weather Forecast
Unsettled warmer weather for the next few days. Overnight -10. Tomorrow mainly cloudy with isolated flurries. Freezing level 2100m. Alpine highs 0 C. Ridge winds south 10-20 km/h. More sun to the north near the townsite. On Wednesday 5-10cm of new snow lesser amount near the townsite with more sunshine.
Snowpack Summary
The 50cm of snow that fell last week and into the weekend has formed wind slabs up to 1.5m's thick at and above treeline. Large cornices loom above. Below the slab is a mid-pack with several crusts and persistent instabilities of facets and surface hoar. Closer to the ground a weak base around the November rain crust and depth hoar below.
Avalanche Summary
A widespread avalanche cycle took place over the weekend with crowns up to a kilometer long and in places 2m deep. The largest are size 3.5 and have run full path several stepped to basal layers near ground. From treeline less activity and more in the class 2-2.5 range. Control work today produced numerous size 3 avalanches from the alpine.
Confidence
Freezing levels are uncertain on Wednesday
Avalanche Problems
Wind Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood: Likely - Very Likely
Expected Size: 2 - 3
Cornices
Aspects: North, North East, East, South East.
Elevations: Alpine, Treeline.
Likelihood: Likely
Expected Size: 1 - 3
Deep Persistent Slabs
Aspects: All aspects.
Elevations: All elevations.
Likelihood: Likely - Very Likely
Expected Size: 2 - 4