Avalanche Forecast

Issued: Nov 21st, 2016 4:44PM

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

Avalanche Canada swerner, Avalanche Canada

Given the very limited information on hand for this bulletin, I would tread cautiously and take the time to gather snowpack information as I go. Please submit any observations from your day to the MIN.

Summary

Confidence

-

Weather Forecast

Weather off the South Coast remains persistent with a solid southerly flow through tonight and tomorrow. Cooler air accompanies this low, keeping freezing levels lower than expected with these frontal systems. By Tuesday night freezing levels will slightly rise to 1500 m then drop back to 800 m or for the remainder of the week. The region will continue to get slammed by these storms with moderate- heavy precipitation falling as snow at upper elevations.

Avalanche Summary

No new avalanche activity reported, however; strong winds and snow at upper elevations will likely build new storm slabs.

Snowpack Summary

There is most likely not enough snow yet for avalanches below treeline. Early reports from this region are very limited and the North Shore ski hills are only reporting up to 20 cm of accumulated snow. A deeper, consolidated snowpack sits from 1600 m- 1900 m where depths are 70-100 cm. Climbing higher into the alpine, 100 cm plus exist. The upper snowpack is moist and heavy with wind effect on leeward slopes and buried 30-40 cm down is a thick crust (10-15 cm). Reports suggest the new snow is sticking to this crust. When traveling in the mountains Id maintain an investigative approach and dig down to test for weak layers before committing to a slope. If you've been in the mountains, please share your observations on our Mountain Information Network.

Problems

Storm Slabs

An icon showing Storm Slabs
Storm slabs are building and may be touchy to rider triggers in the alpine.
Make observations and assess conditions continually as you travel.Avoid avalanche terrain at upper elevations during periods of loading from new snow, wind, or rain.

Aspects: All aspects.

Elevations: Alpine.

Likelihood

Possible - Likely

Expected Size

1 - 2

Valid until: Nov 22nd, 2016 2:00PM