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Archived

Avalanche Forecast

Apr 11th, 2012–Apr 12th, 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
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: Little Yoho.

Temps will remain at or above 0 at valley bottom tomorrow with the possibility of rain. Up to 25cm of snow is expected at high elevations starting tomorrow midday. The danger rating will rise until the new snow has a chance to settle.

Avalanche Problems

Wind Slabs

Up to 30cm of new snow and accompanying wind will create fresh windslabs at higher elevations by Friday. These windslabs will likely settle quickly, due to the warm temperatures. The layer will be most active just after the storm.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3

Deep Persistent Slabs

The Feb 12 surface hoar is still causing isolated slides. Areas of most concern is terrain with a weak, shallow and rocky snow-pack. In deeper snow-pack areas these layers are not as reactive. Large triggers like cornices may trigger this layer.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3

Loose Wet

Currently the warm temps encourage the potential for loose and wet avalanches. As the temps cool off to below 0, the danger of loose wet avalanches decreases significantly. Pay attention to temps at your location and anticipate temps far above you.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3