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Archived

Avalanche Forecast

Mar 10th, 2013–Mar 11th, 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
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
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: Cariboos.

Confidence

Fair - Forecast snowfall amounts are uncertain on Monday

Weather Forecast

Overnight and Monday: A weak disturbance is moving Southwards across the Interior Ranges bringing light precipitation and strong Northerly winds. Freezing levels should drop to valley bottoms overnight and then rise to about 1000 metres.Tuesday: A Low pressure system is expected to track inland from the South Coast during the day bringing moderate to heavy precipitation and freezing levels rising up to about 1500 metres. Winds becoming strong Westerly.Wednesday: Another frontal system is expected to move inland from the coast.

Avalanche Summary

Some loose moist snow and cornice releases were reported. There are no new reports of avalanches releasing on the February 12th weak layer.

Snowpack Summary

New wind slabs are expected to develop as the next pulse of precipitation moves in with strong winds. New snow is expected to bury the recently developed surface hoar and sun crusts. The weak layer of surface hoar that was buried around February 12th may be triggered by storm snow avalanches in motion, or by cornice fall and other large triggers. The strong solar radiation may trigger some cornice fall or release moist loose snow in steep terrain that may step down to one of the deeper weak layers.

Avalanche Problems

Wind Slabs

New snow and wind is expected to develop new windslabs that may be easy to trigger where they are sitting on anew layer of surface hoar and/or a sun crust.
Avoid freshly wind loaded features.>Be cautious as you transition into wind affected terrain.>

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 3

Persistent Slabs

A weak layer of surface hoar buried down about 100-150 cm (February 12th layer) may continue to be triggered by large forces like cornice fall or storm snow avalanches in motion.
Be aware of the potential for large, deep avalanches due to the presence of buried surface hoar.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 6