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Archived

Avalanche Forecast

Feb 19th, 2014–Feb 20th, 2014
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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
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: Banff Yoho Kootenay.

The storm snow still needs time to settle and bond. Conservative route choices are still advised.

Weather Forecast

Mainly cloudy with isolated flurries through to Friday. Alpine temperatures reaching a high of -9. Light southwest winds with moderate gusts.

Snowpack Summary

30 -70 cm of recent storm snow is settling and overrides the Feb 10th interface. A poor bond persists at this interface and many avalanches have been observed on this layer over the past week. Recent SW winds have created wind slabs in lee alpine terrain. These wind slabs are easily triggered and often step down to the Feb 10th interface.

Avalanche Summary

The natural avalanche cycle seems to have subsided, however many skier triggered wind slabs up to Class 1.5 were reported today. A size 3 natural off of Mt. Wapta was observed yesterday and explosive control work today on the Yoho Highway Paths resulted in several Class 2.5's and one Class 3 all running in the storm snow.

Confidence

Avalanche Problems

Persistent Slabs

The recent storm snow is settling but a poor bond still exists on the storm snow interface. Natural activity has decreased but it is still possible for skiers to trigger this layer.
Avoid open slopes with any steepness over 30 degrees.Avoid unsupported slopes.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 2 - 3

Wind Slabs

Recent SW winds have created touchy wind slabs on lee alpine and treeline terrain. These wind slabs are reactive to skier triggering.
Use caution in lee areas in the alpine and treeline. Recent storm snow has formed touchy slabs.Be cautious as you transition into wind affected terrain.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 3