Avalanche Forecast

Issued: Nov 12th, 2011 4:08PM

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

Snow Safety, Parks Canada

Banff Yoho Kootenay.

Skier accidental in the Lake Louise region today, see the bulletin for more details.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Due to the quality of field observations on Sunday

Problems

Wind Slabs

Staff triggered 3 size 1 avalanches: one skier accidental and two by explosives in Paradise Bowl, Lake Louise (40 cm thick, 6-15 m wide, and ran up to 125 m). Watch for where the snow becomes slightly more cohesive from wind effect & snow depth.

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

Elevations: Alpine, Treeline.

Likelihood

Likely

Expected Size

1 - 2

Storm Slabs

After a brief reprieve, the WSW winds have returned moving the 15-20 cm of storm snow to lee features. Expect storm slabs to be reactive, especially if they sit on the hard slabs from last week's wind event.

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

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 2

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