Avalanche Forecast

Issued: Dec 26th, 2011 4:00PM

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

Garth Lemke, Parks Canada

Jasper.

A cornucopia of windslabs exist across the landscape with steady moderate winds. Many slopes are stripped bare or wind pressed. Cool temperatures aiding stability after 20cm warm storm but human triggered avalanches remain possible.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Wind effect is extremely variable

Problems

Wind Slabs

Moderate winds continue to hammer the Icefields. 20cm last night blew away or melded into existing windslab. surface conditions range from boilerplate, sustrugi, and loaded lee slopes. Avoid slabby feeling slopes.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Deep Persistent Slabs

Basal facet collapses are still possible and will remain a concern as consequences would be big if triggered. Shallow snowpack areas and rocky outcrops are trigger locations.

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

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

2 - 3

Valid until: Dec 27th, 2011 4:00PM