Avalanche Forecast

Issued: Nov 22nd, 2014 8:01AM

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

pgoddard, Avalanche Canada

Sea To Sky.

Stormy conditions over the next few days. Avalanche conditions may change quickly at alpine elevations.

Summary

Confidence

Poor - Due to the number of field observations

Weather Forecast

A series of fronts will arrive in quick succession over the next few days. Sunday: 5-10 mm precipitation. Freezing level around 1000 m. Light to moderate SW winds. Monday: Up to 20 mm precipitation with freezing level climbing to around 1900 m. Moderate to strong SW winds.Tuesday: 15-25mm with freezing level near 2000 m. Moderate to strong W to SW winds.

Avalanche Summary

No avalanches have been reported. Please let us know what you're seeing out there.

Snowpack Summary

Welcome to winter! As we begin our forecasting season, we are working with limited information from the field. Early reports suggest there's enough snow for avalanches at alpine and some treeline elevations. Recent snow is likely to have been redistributed into slabs on lee slopes at alpine elevations. This snow may overlie a weak old snow surface (surface hoar, facets and/or a crust) which developed during the recent dry spell. Check the bond of the snowpack at this level and take a cautious approach as new snow builds deeper above this layer.

Problems

Storm Slabs

New snow is building up over a potentially weak old surface interface. Changing winds may leave wind slabs on a variety of slopes.

Caution around convexities or areas with a thin or variable snowpack.>Avoid freshly wind loaded features.>

Aspects: North, North East, East, South East, South, South West.

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 3

Valid until: Nov 23rd, 2014 2:00PM