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Avalanche Forecast

Feb 23rd, 2013–Feb 24th, 2013
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
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

Regions: South Rockies.

Confidence

Poor - Timing, track, or intensity of incoming weather is uncertain for the entire period

Weather Forecast

Sunday: Strong W winds. Light to moderate snow, starting late in the day. Alpine temperature around -6.Monday: Light to moderate NW winds. Light snow. Alpine temperature around -7.Tuesday: Light SW winds. Light snow. Alpine temperature around -7.

Avalanche Summary

On Saturday, naturally triggered (some by cornice fall) slabs to size 2 were observed on steep slopes. Numerous loose dry avalanches (size 1.5) failed naturally (some with cornice fall as the trigger) and with skier traffic in steep terrain on Friday. In the south-east of the region, a size 2 slab was triggered by explosives.

Snowpack Summary

10-30 cm of snow which fell on Friday added to recent snowfall above old surfaces including loose dry snow, old wind slabs and sun crusts. This recent snow (up to 50 cm total) has been shifted onto lee slopes by strong SW to NW winds. New storm slabs, cornices and wind slabs are likely. Mid and lower snowpack layers are generally well settled and stable.

Avalanche Problems

Storm Slabs

Recent snow and wind has created touchy slabs, particularly in the lee of terrain breaks such as ridges and ribs.
Avoid freshly wind loaded features.>Give cornices a wide berth when travelling on or below ridges.>Be cautious of sluffing in steep terrain.>

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 4