Avalanche Forecast
Issued: Dec 9th, 2011 9:09AM
The alpine rating is Wind Slabs and Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Fair - Due to limited field observations
Weather Forecast
Saturday: Expect high clouds with winds reaching 40-70 km/h from the southwest and temperatures climbing to -5. Sunday & Monday: The ridge rebuilds giving mostly clear skies and moderate westerly winds. Freezing levels could peak at 1200m on Monday.
Avalanche Summary
A couple of large (size 2.0-2.5) natural avalanches have been reported releasing along the TCH highway corridor.
Snowpack Summary
The Surface Hoar continues to grow due to the clear and cold nights and the cold temperatures are also promoting near surface facetting. Expect to find a sun-crust that has formed in the alpine on south through west aspects. Wind slabs persist in the alpine and in large openings at treeline. Some areas have a rain-crust below treeline from the 28th of November that has been buried by about 20 cms of snow. This rain-crust may be developing facets, and could become a layer of interest after it is buried by more of a load. There is still some concern associated with the November 7 surface hoar layer. This layer is buried 100-150 cms. Tests are showing that this layer is getting harder to trigger, but if an avalanche does release on this layer, it is likely to be large and destructive.
Problems
Wind Slabs
Aspects: North, North East, East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 10th, 2011 8:00AM