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Archived

Avalanche Forecast

Jan 25th, 2013–Jan 26th, 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
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
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

Regions: Northwest Coastal.

Confidence

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

Weather Forecast

Saturday: Moderate SW winds, changing to strong to extreme NW. Alpine temperature near -6. 5 cm snow.Sunday: Strong to extreme W to NW winds. Alpine temperature near -8. 10-20 cm snow.Monday: Light W wind. Alpine temperature near -13. Very light snow.

Avalanche Summary

Small soft slabs and loose dry avalanches have been failing naturally and with skier traffic. A size 3 avalanche failed naturally in very steep terrain on Thursday.

Snowpack Summary

Variable amounts of new snow are building up over a medley of surfaces including hard and soft wind slabs, scoured slopes, blue ice, thin melt-freeze crusts and surface hoar. Winds are shifting snow into slabs in the lee of terrain breaks such as ridges and ribs. Two persistent weaknesses (comprising surface hoar and facets) buried in the upper snowpack recently gave moderate to hard, sudden results in snowpack tests. The mid and lower snowpack is generally well settled and strong, although basal facets remain a concern in the north of the region.

Avalanche Problems

Storm Slabs

Wind-loading may trigger a natural avalanche cycle this weekend. Fast-running loose dry avalanches may also be encountered in areas not affected by the wind.
Avoid freshly wind loaded features.>Be cautious of sluffing in steep terrain.>

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 5