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Archived

Avalanche Forecast

Apr 9th, 2012–Apr 10th, 2012
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Banff Yoho Kootenay.

Freezing levels are forecast to be 3000 m on Tues and Wed. The hazard will rise throughout the day as temperatures warm and the snow becomes moist. More intense solar radiation and a quicker warm up is expected on Wed hence the higher hazard rating.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Avalanche Problems

Loose Wet

The warm sunny days that we have been having means loose wet slides can be expected on solar aspects in the afternoon. Expect an increase in this activity over the next few days as freezing levels rise. Start and finish your tours early.

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

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 3

Deep Persistent Slabs

The Feb 12 surface hoar is still causing isolated slides. Areas of most concern is terrain with a weak, shallow and rocky snow-pack. In deeper snow-pack areas these layers are not as reactive. Large triggers like cornices may trigger this layer.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3

Wind Slabs

Wind slabs can still be initiated around the lees of ridge crests, convex features, and where they sit on a sun crust. These are becoming more isolated as they settle out, but recent activity shows they are still possible to trigger.

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2