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Archived

Avalanche Forecast

Mar 27th, 2012–Mar 30th, 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
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
2: Moderate
The avalanche danger rating at treeline will be moderate
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
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: Waterton Lakes.

Continued warm temperatures will start to slowly cool over the next few days. Rain may strongly effect stability at lower elevations. Cornices and widespread windslabs have grown at tree line and above.

Avalanche Problems

Wind Slabs

Look for these slabs in open lee areas and avoid large or planar slopes where they may be continuous. Feel for these with your poles as they become buried with new snow.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 3

Loose Wet

Warming will create moist snow at lower elevations. Up to 15mm of rain are expected Wed and Thurs. Stay in low angle and supported terrain if you are skiing on moist snow. Remember small slides could be the large load needed to trigger deeper slabs.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Likely

Expected Size: 1 - 2

Persistent Slabs

Warming events this month have created two crusts below 1900m on shaded aspects and to ridgelines on solar aspects down about 50 and 100cm. Slabs may still be triggered on these deeper layers with large loads especially given the expected warming.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3