Avalanche Forecast

Issued: Nov 17th, 2017 4:00PM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is below threshold. Known problems include Wind Slabs.

deryl kelly, Parks Canada

Jasper.

Wind slabs forming at ridge crests and open TL features reactive to skier traffic. Expect hazard to increase if forecasted snow checks-in on Sunday!

Summary

Weather Forecast

Temperatures to remain cool over the weekend. A warm moist system expected in the region overnight Sunday. Bringing with it warmer temps and potentially up to 30cm of snow.

Snowpack Summary

Generally a strong, and supportive early winter snowpack exists with depths ranging from 30 to 100+ cm depending on aspect and exposure to wind. Wind effect on recent snow isolated to exposed slopes and ridge tops in the alpine. New snow remains well preserved on sheltered aspects.

Avalanche Summary

No new natural activity reported from a field team. Climbers should still remain vigilant as even triggering a small avalanche in a gully feature or above cliffs can have severe consequences.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Sunday

Problems

Wind Slabs

Reactive wind slab, 20-30cm deep predominately on exposed alpine and treeline features. Human triggering possible.

Avoid terrain traps, such as gullies, where the consequences of a small avalanche could be serious.Be careful with wind loaded pockets while approaching and climbing ice routes.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Nov 18th, 2017 4:00PM