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Archived

Avalanche Forecast

Mar 23rd, 2012–Mar 24th, 2012
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
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
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Glacier.

Watch for periods of intense solar inputs this afternoon. Sat. freezing levels rise to 1500m with mild temperatures. On Sun very mild temps and freezing levels to 2500m. Clear skies over the weekend. The sun hits E asp in the AM.

Avalanche Problems

Loose Dry

Convective showers over the past 3 days have deposited new snow over a variety of surfaces. Expect sluffing to small avalanches. Periods of intense solar could turn loose dry to wet on S-W aspects this afternoon.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2

Cornices

Most ridges throughout the Park have massive cornices. Cornices could fail today with rising temperatures under strong solar radiation. Cornice failure is unpredictable. Be aware of the overhead hazard on your approach.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 2 - 4

Deep Persistent Slabs

No recent activity reported on this layer down 1-5-2 meters. Skiers are unlikely to fail this layer, but consequences are high if this layer does fail. Cornice failure or mass from loose snow avalanches could trigger this layer.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Unlikely - Possible

Expected Size: 2 - 4