Archived

Avalanche Forecast

Jan 26th, 2012–Jan 27th, 2012

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

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

3: Considerable

The avalanche danger rating at treeline will be considerable

Below Treeline

2: Moderate

The avalanche danger rating below treeline will be moderate

Regions: Little Yoho.

Parks Canada will be conducting avalanche control on Mt's Bosworth, Stephen, and Dennis tomorrow, Jan 27. No skiing or climbing in these areas.Field observations today saw strong W/SW winds redistributing snow in the alpine and at treeline.

Avalanche Problems

Wind Slabs

At treeline 30-50 cm of settled storm snow sits overtop of the Jan 20 facet interface. Where the wind has created soft slabs this layer is touchy and reactive to skier triggering. Immediate lees of ridges above treeline are the areas of most concern.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2

Persistent Slabs

In most parts of the forecast area a settled midpack overlies a weak facetted base. Be aware of steep shallow snowpack areas where the likelihood of triggering these basal facets is highest. The basal facets are still reactive east of the Divide.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3