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Archived

Avalanche Forecast

Mar 22nd, 2012–Mar 23rd, 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
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: Jasper.

A skier remotely triggered a size 3 avalanche today in the Portal creek drainage from 300m away, deep instabilities remain in the snowpack.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Timing or intensity of solar radiation is uncertain

Avalanche Problems

Persistent Slabs

The buried surface hoar layer remains a concern in areas that have not recently avalanched. Variable winds have made judging bridging strength/depth a difficult task. Solar effect will weaken the bridging effect of the slab on exposed slopes.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 2 - 4

Storm Slabs

Recent mod-strong alpine winds have formed slabs and large cornices on lee slopes. Cornices anchors are weakened by solar radiation, especially along rocky, wind-exposed ridges. Cornice failure and windslab avalanches may trigger deeper layers.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3

Loose Wet

Surface snow is responding to the strong solar radiation effect that happens in March and April. Ice climbers should also be wary of large pillows of snow still overhanging routes on solar aspects.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood: Possible - Likely

Expected Size: 1 - 2