Avalanche Forecast

Issued: Feb 22nd, 2012 5:33PM

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

rupert wedgwood, Parks Canada

Jasper.

Winds are expected to shift to the NW which will build soft slabs on sun crusts on south facing slopes near and above treeline.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Forecast snowfall amounts are uncertain on Friday

Problems

Wind Slabs

Strong westerly winds have created 10-30cm soft slabs. Whumping was observed near treeline and several class 1.5 - 2 soft slab avalanches were recorded from the past 24hrs.

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Deep Persistent Slabs

Increase loads with wind or new snow may awaken this instability. Size 2 surface slab avalanches may step down to this layer producing much larger avalanches.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood

Unlikely

Expected Size

2 - 4

Valid until: Feb 23rd, 2012 4:00PM