Avalanche Forecast
Issued: Dec 4th, 2011 9:15AM
The alpine rating is Wind Slabs and Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Fair - Due to limited field observations
Weather Forecast
High pressure is currently dominating the weather throughout the province. Freezing levels rocket to 3000m as an inversion creeps into the region & winds at ridge top are forecasted to be light out of the NW. A weak disturbance moves into the area Tuesday night continuing through Wednesday bringing a small amount of precipitation & lowering freezing levels. The dreaded ridge of high pressure builds back into the area on Thursday.
Avalanche Summary
No recent avalanche observations. We have had limited info from this region. Any field reports are welcome and can be sent to forecaster@avalanche.ca.
Snowpack Summary
Wind slabs probably still exist in lee and crossloaded terrain. Use increased caution on steep, sun-exposed slopes during forecast warming periods.There is a solid rain crust, down 15-30cm below 1800m, which has greatly reduced the likelihood of avalanches at lower elevations.A surface hoar layer has been observed down approximately 45cm in the Duffey Lake area and more is growing on the current snow surface. A facet layer near the base of the snowpack continues to give sudden collapse ("drops") results in snowpack tests. These layers have not produced any avalanches that I am aware of, but it makes sense to keep them on your radar.Continued caution is recommended in shallow, unsupported snowpack areas (lots of rocks or small trees poking through), especially on sun exposed slopes if the sun has any kick.
Problems
Wind Slabs
Aspects: North, North East, East, South East, South.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 5th, 2011 8:00AM