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Avalanche Forecast

Dec 8th, 2013–Dec 9th, 2013
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Sea To Sky.

Confidence

Fair - Timing, track, or intensity of incoming weather system is uncertain on Wednesday

Weather Forecast

An arctic air mass is still sitting over much of BC, however, a series of fronts will start to drive the cold air out of the region through the week.Monday: Cloudy with sunny periods. Precipitation: Nil. Alpine temperature: High -10. Ridge Winds: Light northerly.  Freezing level at valley bottom.Tuesday: Cloudy with sunny periods. Precipitation: Nil. Alpine temperatures: High -9, Ridge Winds: Light northerly.  Freezing level at valley bottom.Wednesday: Flurries. Alpine temperatures: High -3 Ridge winds: Moderate south-westerlies. Freezing level: 900 meters.

Avalanche Summary

No recent reports of natural or human triggered avalanches,

Snowpack Summary

Snowpack depths vary greatly across the region with 160cm at treeline in the Cascades  but only 50 cm along the Duffy.  Terrain below treeline is still mostly below threshold for avalanche activity.Arctic outflow winds have redistributed the snows that fell last week forming wind slabs on S to SW slopes at treeline and in the alpine.  Surface hoar has been growing over the last week in protected locations near tree line while the cold temperatures have driven faceting throughout the snowpack.A few crusts can be found near the ground, especially at higher higher elevations. There haven't been any reports of avalanches on these layers, but they're worth looking for it if you dig a pit.

Avalanche Problems

Wind Slabs

Be cautious as you transition into wind affected terrain.>Avoid lee and cross-loaded terrain near ridge crests.>Avoid travelling in areas that have been reverse loaded by winds.>

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3