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Archived

Avalanche Forecast

Mar 29th, 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
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Wind slabs in the alpine, isothermal mush below treeline, cornices, and glide cracks are all making travel "interesting".

Avalanche Problems

Loose Wet

Warm overnight temperatures over the last few nights prevented the snowpack from refreezing at lower elevations. Yesterdays solar radiation produced numerous avalanches. Little direct solar radiation is expected today but watch out if it shines

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Deep Persistent Slabs

The February weak layer is buried down 1.5 to 2 m. This layer has been reacting infrequently to skier triggering particularly at treeline elevations. Consequences are high if this layer does fail.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Unlikely

Expected Size: 1 - 3

Cornices

Be aware of the overhead cornice hazard. The sun at this time of year is quite strong when it comes out and may be enough to release cornices. They are large triggers and could produce big avalanches. Glide cracks are starting to fail to ground.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 2 - 4