Archived

Avalanche Forecast

Dec 16th, 2011–Dec 17th, 2011

Alpine

3: Considerable

The avalanche danger rating in the alpine will be considerable

Treeline

2: Moderate

The avalanche danger rating at treeline will be moderate

Below Treeline

2: Moderate

The avalanche danger rating below treeline will be moderate

Alpine

3: Considerable

The avalanche danger rating in the alpine will be considerable

Treeline

2: Moderate

The avalanche danger rating at treeline will be moderate

Below Treeline

2: Moderate

The avalanche danger rating below treeline will be moderate

Alpine

3: Considerable

The avalanche danger rating in the alpine will be considerable

Treeline

2: Moderate

The avalanche danger rating at treeline will be moderate

Below Treeline

2: Moderate

The avalanche danger rating below treeline will be moderate

Regions: Banff Yoho Kootenay.

We may receive 10-20cm of snow with the incoming storm Friday night and Saturday. Coupled with strong westerly winds in the alpine, it may not be the weekend for travelling up high if the larger amount of snow falls!

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Avalanche 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. If we receive the 10-20cm of snow and strong winds that are in the models, the surface slabs will be bigger and pack more consequence.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2