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Archived

Avalanche Forecast

Mar 16th, 2012–Mar 19th, 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
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
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Waterton Lakes.

A few large events have been observed: high elevation windslabs that have entrained huge amounts of moist - rain affected snow at lower elevations. Consider your exposure to terrain where these two problems could combine. Best skiing is above 1800m.

Avalanche Problems

Wind Slabs

Winds have formed slabs during the storms this last week that are now becoming buried with new snow. Feel for these with your poles and keep the terrain supported and angle modest if you suspect they are around.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 3

Loose Wet

Below 1800m rain soaked snow can be found above a crust 40- 60 cm deep. Choose low angle terrain in these elevations until some sustained cold temps freeze this into more stable snow.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2

Storm Slabs

Up to 130 cm of snow from this week now covers the crust and hard slab interface. Warm temps have influenced several of the layers within this snow and a few shears exist at various elevations. Dig down to this interface to evaluate these shears.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 2