Avalanche Forecast

Issued: Nov 22nd, 2011 4:05PM

The alpine rating is high, the treeline rating is considerable, and the below treeline rating is low. Known problems include Storm Slabs and Persistent Slabs.

a.l. horton, Parks Canada

Jasper.

Up to 30 cm of heavy wet snow fell on Tuesday with another 20 cm of snow expected through the day on Wednesday. The avalanche hazard will be High on Wednesday!

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Forecast snowfall amounts are uncertain on Wednesday

Problems

Storm Slabs

Another pulse of heavy snow is forecast to fall Wednesday. An additional 20 cm is expected adding to the 25 cm that has already fallen. This new snow has formed variable slabs on N-NE alpine and treeline slopes that will be easily triggered.

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood

Likely - Very Likely

Expected Size

2 - 3

Persistent Slabs

Warm temperatures and heavy wet snow may increase the possibility of natural avalanches on the weak basal facets below these slabs.

Aspects: North, North East.

Elevations: Alpine, Treeline.

Likelihood

Likely

Expected Size

1 - 3

Valid until: Nov 23rd, 2011 4:00PM