Avalanche Forecast

Issued: Jan 4th, 2015 4:00PM

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

steve blagbrough, Parks Canada

Jasper.

Summary

Weather Forecast

Arctic blast is starting to abate with a return to more moderate temperatures and snow showers throughout the week.

Snowpack Summary

Mid pack carrying well for skiing. Exposed alpine features scoured of snow. Ice becoming very brittle in these arctic conditions.

Avalanche Summary

The debris of a size one slab avalanche observed in the Winston Churchill Range which ran on a steep west facing aspect in the last 24 hours.

Confidence

Intensity of incoming weather systems is uncertain on Monday

Problems

Wind Slabs

Light to moderate variable winds are producing soft slabs on sheltered slopes and cross loaded features.

Be cautious as you transition into wind affected terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Deep Persistent Slabs

This weak layer exists below a strong mid-pack at treeline and sub-alpine elevations. Large loads such as a cornice collapse or surface slides could still possibly trigger this deep persistent weakness.

Carefully evaluate and use caution around thin snowpack areas.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Valid until: Jan 5th, 2015 4:00PM