Avalanche Forecast

Issued: Dec 15th, 2011 4:00PM

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

Brad White, Parks Canada

Banff Yoho Kootenay.

There is a possibility of 10-20 cm of snow over higher windward terrain with the storm coming Friday afternoon and Saturday morning, but there is some uncertainty due to variability in the models.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Intensity of incoming weather systems is uncertain on Saturday

Problems

Deep Persistent Slabs

In many areas the hard wind slab on wind loaded features is bridging the weak facets and depth hoar at the base. There is still a possibility of human triggering a large full depth avalanche on any steep slope.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

2 - 3

Wind Slabs

There are a few fresh thin wind slabs on immediate lee features in the alpine that can be easily triggered.

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

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Dec 16th, 2011 4:00PM