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Avalanche Forecast

Dec 10th, 2013–Dec 11th, 2013
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
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
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Sea To Sky.

Confidence

Fair - Forecast snowfall amounts are uncertain on Thursday

Weather Forecast

The arctic air mass that has be sitting over much of BC for the last week is starting to retreat as a series of storm fronts drive warmer air into the province.  Expect isolated flurries and light winds from the southwest on Wednesday  The precipitation will intensify slightly on Thursday with southwest winds at ridgetop will strengthening through the day. Friday will see a brief clearing with sunny periods, and light winds.

Avalanche Summary

Avalanche observations and snow pit tests indicate that lingering windslabs may still be reactive.

Snowpack Summary

Snowpack depths vary greatly across the region with an average of 100cm at treeline. 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, especially in shallow areas.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

Northeast winds redistributed the snow from last week forming windslabs in lee features at ridgeline and on cross-loaded slopes.  Don't let wind slabs in unusual places catch you by surprise.
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