Avalanche Forecast

Issued: Nov 21st, 2012 8:57AM

The alpine rating is below threshold, the treeline rating is below threshold, and the below treeline rating is below threshold.

Avalanche Canada triley, Avalanche Canada

This bulletin is based on limited data. Local variations in conditions are likely to exist. Check out the forecasters blog for further details on interpreting early season bulletins. 

Summary

Confidence

3 - 139

Weather Forecast

Warm and wet should continue overnight Wednesday, and end sometime early Thursday morning. Expect valley cloud and some periods of broken skies during the day Thursday. Temperatures should cool a couple of degrees by Thursday evening, but will probably be short lived. The next Pacific system is expected to make it to the interior ranges by Friday, bringing rising freezing levels and moderate precipitation amounts.

Avalanche Summary

Some larger avalanches up to size 3.0 have been reported from steep large features on North faces in the alpine that can be seen from the highway corridors. Some smaller avalanches, and a couple of size 2.0 avalanche have been reported from North through East aspects where the wind deposited snow in the lee of terrain features.

Snowpack Summary

Recent wind slabs have been buried by another pulse of snow on Wednesday. Some people are reporting a thin crust on solar exposed aspects that developed late last week, and is now buried by the new storm. The freezing level went up to about 1500 metres during the recent storm. Snow levels taper off to below threshold by about 1200 metres. There is about 60-80 cms of recent storm snow above an early November crust, or series of laminated crusts. Tests have been showing easy to moderate SP (sudden planar) pops on weak facetted crystals at this crust interface, or within the crust sandwich.

Valid until: Nov 22nd, 2012 2:00PM

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