Avalanche Forecast
Issued: Dec 15th, 2021 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
Stephen Holeczi,
There is uncertainty regarding wind slabs in the alpine due to minimal observations. Benign weather and a dive in temperatures Thursday/Friday will likely continue to improve conditions.
Summary
Weather Forecast
Light winds, cold temperatures (below -20C), and no new snow expected on Thursday. Friday will have slightly warmer temperatures (-12C) and continued light winds.
Snowpack Summary
20-30 cm of low density surface snow with limited windslab development in the alpine. There is a Dec. 2 rain crust below 2200m down 40-60cm which has facets above and below which will be one to watch in the future. The basal Nov.5 crust is found in thin areas but is currently dormant. Average HS at treeline 150cm.
Avalanche Summary
Lake Louise ski hill had explosive controlled wind slabs to size 2 in very steep alpine features. No other avalanches noted.
Confidence
Problems
Wind Slabs
We still have limited information about distribution of these in the high alpine. Most reports have talked of minimal wind effect, and ski hills reporting limited activity with explosive control.
Aspects: North, North East, East, South East, South.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Dec 16th, 2021 4:00PM
