Archived

Avalanche Forecast

Apr 5th, 2012–Apr 6th, 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

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

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.

Travel conditions below treeline, especially on solar aspects, are becoming difficult, due to moist sticky snow. Cornices, glide cracks, storm snow and deep weaknesses remain a concern going into the weekend.

Avalanche Problems

Storm Slabs

Another 18cm of storm snow adds load to the existing storm slabs. At lower elevations, the snow is getting close to zero degrees. As air temperatures get warmer, the snowpack may become rapidly weak.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 3

Deep Persistent Slabs

The Feb 8 surface hoar is still well preserved in many locations, down 150-200cm. Although becoming hard to trigger, the right trigger such as a cornice fall or glide crack failure can result in large, very destructive avalanches .

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 3 - 4

Wind Slabs

Wind slabs have formed on lee aspects where storm snow has been deposited

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 2 - 4