Avalanche Forecast

Issued: Feb 9th, 2016 4:15PM

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

Parks Canada garth lemke, Parks Canada

Crazy warm temperatures on Tuesday. Give the snowpack a couple days to adjust. The cooling trend will help to stabilize.

Summary

Weather Forecast

Now until Friday, freezing level will hover around 1800m, temperatures will be seasonal -3 to -6 with good overnight freeze Tuesday night. Expect freeze thaw conditions. Mixed clouds and trace of snow rest of the week. 

Snowpack Summary

Tuesday's warm temperatures softened alpine surface snow and weakened lower elevations snowpack making for moist/wet conditions. Slabs will persist at tree-line and above on North-Easterly aspects below ridge crests and cross-loaded terrain. The mid-pack is facetted, new snow interface is a concern along with a decomposed surface hoar down 40cm.

Avalanche Summary

Warm temperatures induced a natural avalanche cycle on Tuesday late afternoon. Size 3's noted in the alpine and size 2's at lower elevations. Highway 93 was subsequently closed in the late afternoon.

Confidence

Timing or intensity of solar radiation is uncertain

Problems

Persistent Slabs

An icon showing Persistent Slabs
Previously formed slabs now comprise the upper and mid-pack in many locations. They can rest on weak facets.
Make observations and assess conditions continually as you travel.Watch for whumpfing, hollow sounds, shooting cracks or recent avalanches.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

1 - 3

Wind Slabs

An icon showing Wind Slabs
Windslabs will persist on lee aspects and crossloaded features. Triggering one has potential to initiate a deep release. May be pockets of decomposed surface hoar lurking 30-60cm down.
Avoid lee and cross-loaded terrain near ridge crests.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Valid until: Feb 10th, 2016 4:00PM

Login