Avalanche Forecast
Issued: Dec 13th, 2011 8:57AM
The alpine rating is Wind Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Fair - Timing, track, or intensity of incoming weather is uncertain on Friday
Weather Forecast
Wednesday: Flurries expected in the evening with light - moderate ridgetop winds from the north east. Thursday: Sunny and cold during the day. Treeline temperatures near -10. Winds light from the north east. Friday: Cloudy with moderate snowfall expected. Freezing levels may rise to 700m.
Avalanche Summary
No recent avalanche activity has been reported.
Snowpack Summary
Up to 20cm new snow has fallen on a variety of snow surfaces including surface hoar, melt-freeze crusts and facetted snow. For the most part all aspects between 900m-2000m have a hard melt freeze crust. This crust is widespread and is lingering in most start zones. This may be a suspect layer of concern as when future storms with significant snow and wind arrive. Above this crust surface hoar (feathery crystals) and facets (sugary crystals) are forming. This exists at treeline and below treeline elevations. The recent winds in the alpine have destroyed the surface hoar eliminating one problem but creating a wind slab problem. These wind slabs are in the immediate lee of features, with easy shears and cracking being reported. The midpack seems to be well settled and strong. Thanks to those who have sent in field observations. If you have any info from the field, we would love to hear from you. Write to us at forecaster@avalanche.ca
Problems
Wind Slabs
Aspects: North, North East, East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 14th, 2011 8:00AM