Avalanche Forecast

Issued: Feb 17th, 2012 9:19AM

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

jlammers, Avalanche Canada

Sea To Sky.

Summary

Confidence

Fair - Forecast snowfall amounts are uncertain on Friday

Weather Forecast

Saturday: light accumulations of new snow / moderate southeasterly winds becoming light throughout the day / freezing level @ 1000m Sunday: trace amounts of snowfall / light to moderate northwesterly winds / freezing level @ 700m Monday: light snowfall / strong westerly winds / freezing level @ 1000m

Avalanche Summary

Fairly widespread wind slab activity is expected with strong winds and moderate snowfall forecast for Friday night.

Snowpack Summary

Moderate snowfall and strong winds forecast for Friday night will create new wind slabs and continue to bury an assortment of old snow surfaces including crusts and surface facets. The crusts exist on all aspects at lower elevations and on steep solar aspects higher up. Surface facets have grown particularly on northern aspects where colder temperatures have persisted. Facets may also exist in combination with crusts. The mid and lower snowpack are strong and well settled. The average treeline snowpack depth is about 240cm.

Problems

Wind Slabs

Forecast strong winds and moderate snowfall will create new and reactive wind slabs at treeline and in the alpine.

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

Elevations: Alpine, Treeline.

Likelihood

Likely - Very Likely

Expected Size

1 - 4

Valid until: Feb 18th, 2012 9:00AM