Avalanche Forecast

Issued: Feb 21st, 2012 6:17PM

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.

Strong winds are creating wind slabs at and above treeline. Skier accidently triggers a size 1.5 avalanche. Any new snow will increase the danger.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Forecast snowfall amounts are uncertain on Tuesday

Problems

Wind Slabs

Strong westerly winds have created a 10-30cm soft slab. A skier near the Icefields triggered a size 1.5 at treeline and a size 2 natural was observed from the alpine near Maligne Lake.

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 22nd, 2012 4:00PM