Avalanche Forecast

Issued: Nov 30th, 2013 8:46AM

The alpine rating is considerable, the treeline rating is considerable, and the below treeline rating is low. Known problems include Storm Slabs.

jlammers, Avalanche Canada

South Coast.

Sunday's posted avalanche danger ratings are an average for the region. Actual avalanche danger may be HIGH in the south of the region where heavy snowfall is forecast.

Summary

Confidence

Fair - Forecast snowfall amounts are uncertain on Sunday

Weather Forecast

Sunday: Moderate snowfall with heavy accumulations forecast for the south of the region (Coquihalla, Alison Pass) / Strong southwest winds / Freezing level at about 1300mMonday: Mix of sun and cloud / Moderate west winds / Freezing level at valley bottomTuesday: Clear skies / Light north winds / Alpine temperatures of about -18.0

Avalanche Summary

There is no new avalanche activity to report. I would expect a round of storm slab activity with weather forecast for Sunday.

Snowpack Summary

Reports suggest there is about 50cm of snow at 1600m in the Duffy Lake area, and about 100cm at the same elevation on the Coquihalla. Terrain below treeline is reported to be mostly below threshold.A developing storm slab now overlies a generally well settled snowpack. Closer to the base of the snowpack you may find a few crusts which may have associated facets at higher elevations. Observers are not identifying any of these as cause for concern at this time, although they might be worth exploring.

Problems

Storm Slabs

New snow and wind will create reactive and potentially destructive storm slabs. Watch for increased triggering in wind affected terrain.

Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.>Stay off recent wind loaded areas until the slope has had a chance to stabilize.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Likely

Expected Size

1 - 4

Valid until: Dec 1st, 2013 2:00PM