Avalanche Forecast

Issued: Jan 12th, 2012 8:42AM

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

ali haeri, Parks Canada

Glacier.

Summary

Problems

Wind Slabs

Little change overnight. Strong south winds from the previous storm have left wind slabs generally found to the lee of alpine ridges and on cross loaded features at upper elevations. Wide propagation is possible.

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

Elevations: Alpine.

Likelihood

Possible

Expected Size

2 - 3

Storm Slabs

A freezing rain crust down 50 - 60cm more prevalent west of Rogers Pass summit, shows signs of strengthening but is still a concern for skier triggering. Avalanches in this layer could trigger the surface hoar layers buried in December.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

2 - 3

Persistent Slabs

The Dec. 11 SH layer may produce avalanches when heavily loaded. Cornice failure is a current concern. Step down failures possible.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

2 - 4

Valid until: Jan 13th, 2012 8:00AM