Avalanche Forecast

Issued: Nov 29th, 2017 4:00PM

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

deryl kelly, Parks Canada

Jasper.

Excellent riding can be found in sheltered treeline locations.

Summary

Weather Forecast

Cloudy with sunny periods and isolated flurries bringing a trace of new. Cools temps with light to moderate SW gusty winds. Alpine high, -8.

Snowpack Summary

Wind slabs continue to build in exposed lee features. Storm slabs formed with 40cm of snowfall over the weekend. These problems sit on a recently developed rain crust 30-60cm deep. A persistent slab up to 200cm thick sits on the Halloween Crust, low in the snowpack. This crust can be found up to 2,700m depending on location.

Avalanche Summary

Previous unobserved natural activity from the alpine, evident meow with good visibility.

Confidence

Due to the number and quality of field observations

Problems

Wind Slabs

Sensitive wind slabs continue building at ridge tops and if triggered, has the potential to step down to the deeper instability.

Avoid avalanche terrain during periods of heavy loading from new snow and wind.Avoid freshly wind loaded features.

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

Elevations: Alpine, Treeline.

Likelihood

Likely

Expected Size

1 - 3

Storm Slabs

Storms slabs continue to be an issues as the recent snow settles. Expecting settlement and new snow load will next few days will help heal this problem.

If triggered the storm/wind slabs may step down to deeper layers resulting in large avalanches.

Aspects: All aspects.

Elevations: Alpine.

Likelihood

Possible - Likely

Expected Size

1 - 2

Valid until: Nov 30th, 2017 4:00PM