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Archived

Avalanche Forecast

Mar 3rd, 2012–Mar 4th, 2012
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
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
4: High
The avalanche danger rating at treeline will be high
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
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Glacier.

Expect moderate to heavy snowfall today, with mild temperatures and strong, gusty winds. Avalanche danger will increase throughout the day.

Avalanche Problems

Storm Slabs

Up to 30cm overlies the "Leap Year" layer of small surface hoar and large snowflakes. Up to 30 cm are expected in the next 24hrs, under gradually warming temperatures. This will result in a cohesive storm slab that will be reactive and may step down.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2

Persistent Slabs

Buried surface hoar layers down 1m continue to be reactive to skiers and in snowpack tests. New snow, amplified by windloading, may trigger these layers naturally. New load may cause cornices to fail triggering these deep layers.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 2 - 3

Wind Slabs

New snow is being transported by strong S winds, producing windslabs and deep drifts from windloading. Windloading will significantly increase the new load overlying persistent weak layers. In these fatter areas, these layers may be easily triggered.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2