Avalanche Forecast

Issued: Dec 12th, 2011 4:04PM

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

Aaron Beardmore, Parks Canada

Banff Yoho Kootenay.

Light accumulations expected Tuesday night, but not enough to change danger rating. New snow from last night refreshed surface, and improved ski quality.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

The weather pattern is stable

Problems

Deep Persistent Slabs

The weak base of depth hoar and facets is now less sensitive to human triggering. We have now entered a period of "low likelihood - high consequence". Shallow and faceted areas are likely trigger points.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

2 - 4

Wind Slabs

10cm very low density snow fell last night. At high elevations a light SW-NW wind has redistributed storm snow into lee areas.

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

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Dec 13th, 2011 4:00PM