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Archived

Avalanche Forecast

Apr 13th, 2012–Apr 14th, 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
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Glacier.

A minimal freeze overnight will breakdown quickly with warm temperatures and rain at lower elevations, resulting in avalanches. Recent glide crack failures due to warm temperatures have caused very large avalanches.

Avalanche Problems

Loose Wet

Freezing temperatures at higher elevations last night, but daytime warming today will cause avalanches. Rain today below tree line will intensify loose snow avalanche activity. Use extra caution below rock outcrops and solar aspects.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 1 - 3

Wet Slabs

Wet and dry slabs have been observed on all aspects. Several buried crusts in the upper snowpack are providing failure planes for these avalanches. Daytime warming, rain and solar exposure will increase the likelihood of triggering these slabs.

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

Elevations: All elevations.

Likelihood: Likely

Expected Size: 2 - 3

Cornices

Cornices are massive, drooping, and beginning to fail. There is good potential for cornice falls to produce large avalanches that run to the bottom of runout zones.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 4