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Avalanche Forecast

Dec 18th, 2012–Dec 19th, 2012
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
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
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: Cariboos.

Confidence

Fair - Due to limited field observations for the entire period

Weather Forecast

Wednesday: Light snowfall with around 5cm of accumulation, strong southwesterly mountaintop winds increasing to extreme overnight, and freezing levels remaining at or near valley bottoms. Thursday: Moderate snow with 5-10cm of accumulation, moderate southerly winds and freezing levels in valley bottoms. Friday: Light flurries tapering off and clearing throughout the day, light southwesterly winds, and freezing levels remaining in valley bottoms.

Avalanche Summary

Small loose snow avalanches have been from steep terrain in the recent low density storm snow. Due to our limited observations for this region at this time, your avalanche observations are welcome at forecaster@avalanche.ca

Snowpack Summary

The upper snowpack comprises deep amounts of unconsolidated snow in sheltered locations, and soft slabs in open, exposed locations. These slabs are most likely immediately behind ridge crests and downslope ribs. There's ample recent snow available to fuel slab development if winds pick up. Overall, the top and mid-snowpack is reported to be settling well. Persistent and Deep persistent instabilities (surface hoar and an early November crust, respectively) located in the middle and near the bottom of the snowpack may still be a concern but there's little recent evidence of them. It is important to know that we have very limited observations for this region. Digging down and making your own observations, especially in thinner snowpack areas, remains a good idea to assist safe slope selection. You're looking for weak layers that pop or drop in stability tests.

Avalanche Problems

Wind Slabs

Wind slabs are able to set up readily at this time due to the amount of low density new snow available for wind transport. Buried wind slabs are reported to exist below some of the new snow in exposed locations, especially on N and E aspects.
Be cautious as you transition into wind affected terrain.>Avoid freshly wind loaded features.>

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 4