Avalanche Forecast

Issued: Apr 18th, 2012 4:00PM

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

jeremy.mackenzie, Alberta Parks

Kananaskis.

The spring transition continues. Slopes are generally stable in the morning, but avalanche hazard will rise each day with warming and solar radiation. Start early and finish early and be observant of changes in the weather.

Summary

Confidence

Good

Weather Forecast

Avalanche Summary

Snowpack Summary

Problems

Loose Wet

Crusts will break down and loose wet slides will occur on solar aspects each day as daytime heating and solar radiation increase. Over the last couple of days avalanches began to occur between 10:00 and 11:00am. Plan your travel accordingly.

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

Elevations: All elevations.

Likelihood

Likely

Expected Size

1 - 4

Wind Slabs

Recent winds have formed pockets of wind slab 20 to 50cm thick along ridgelines and in cross loaded features at higher elevations. A recent skier remote triggered avalanche in the Lake Louise area occurred on this layer.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 4

Deep Persistent Slabs

Weak crystals still linger at the base of the snowpack that could wake up from large triggers such as cornices or a smaller avalanches stepping down. Any avalanche occurring this deep in the snowpack would have devastating consequences for a skier.

Aspects: All aspects.

Elevations: Alpine.

Likelihood

Unlikely - Possible

Expected Size

4 - 7

Valid until: Apr 19th, 2012 9:00AM