Archived

Avalanche Forecast

Mar 13th, 2012–Mar 14th, 2012

Alpine

4: High

The avalanche danger rating in the alpine will be high

Treeline

3: Considerable

The avalanche danger rating at treeline will be considerable

Below Treeline

3: Considerable

The avalanche danger rating below treeline will be considerable

Alpine

4: High

The avalanche danger rating in the alpine will be high

Treeline

4: High

The avalanche danger rating at treeline will be high

Below Treeline

3: Considerable

The avalanche danger rating below treeline will be considerable

Alpine

4: High

The avalanche danger rating in the alpine will be high

Treeline

4: High

The avalanche danger rating at treeline will be high

Below Treeline

3: Considerable

The avalanche danger rating below treeline will be considerable

Regions: Banff Yoho Kootenay.

There are widely conflicting weather forecasts, but some models are predicting up to 30 mm of precipitation by Friday. If the storm materializes the avalanche hazard will remain elevated through the end of the week.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Intensity of incoming weather systems is uncertain on Thursday

Avalanche Problems

Persistent Slabs

The Valentine surface hoar is now down 70-100 cm. Natural activity with this layer is subsiding, however, it is still prime for human triggering. This layer is producing moderate shears in test pits.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 2 - 4

Wind Slabs

Ten to 20 cm of fresh snow today coupled with strong westerly winds have created fresh wind slabs in the alpine. These winds slabs are reactive to skier triggering and may step down to the deeper surface hoar layer resulting in a very large avalanche

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2