Avalanche Forecast

Issued: Dec 2nd, 2016 4:34PM

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

Avalanche Canada cgarritty, Avalanche Canada

Fresh snow and wind are building on already touchy wind slabs in the region. Maintain awareness as the conditions around you change with aspect and elevation.

Summary

Confidence

-

Weather Forecast

SATURDAY: Up to 5cm of new snow will accumulate over the day with moderate to strong westerly winds. Freezing level to 1300m and alpine temperatures to -7.SUNDAY: Up to 5cm of new snow, clearing in the afternoon. Moderate southwest winds will ease and shift to the northwest. Freezing levels dropping to around 500m with alpine temperatures to -10.MONDAY: No new snow, moderate northeast winds, freezing levels dropping to valley bottom with alpine temperatures to -14

Avalanche Summary

While no recent avalanche observations have been reported, growing wind slabs are expected to be sensitive to light triggers. Loose snow can also be expected to sluff from steep terrain either naturally or with a human trigger.. Please post your observations to the Mountain Information Network.

Snowpack Summary

New snow and strong winds are building on existing wind slabs at higher elevations and in exposed areas throughout the region. These slabs may overlie a layer of well-developed surface hoar that was found approximately 15 cm below the snow surface in the north of the region on Monday.  Treeline snowpack depths are around 150cm in the Duffey Lake area, but closer to 60cm in Coquihalla Pass. A layer of 3-5mm surface hoar has been observed at approximately 60cm below the surface in the Pemberton area and has produced easy snowpack test results. A thick crust can be found in the mid-pack down roughly 70-100cm at treeline elevations or deeper in the alpine. Moist snow exists in the bottom 50cm of the snowpack.

Problems

Wind Slabs

An icon showing Wind Slabs
New snow and strong winds are causing wind slabs to grow larger and more reactive. Wind slabs may overlie a weak layer in the upper snowpack.
Make observations and assess conditions continually as you travel.Be alert to conditions that change with elevation.Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Likely

Expected Size

1 - 3

Valid until: Dec 3rd, 2016 2:00PM

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