Avalanche Forecast
Issued: Dec 2nd, 2012 9:17AM
The alpine rating is Storm Slabs and Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Poor - Timing, track, or intensity of incoming weather is uncertain on Tuesday
Weather Forecast
Overnight and Monday: Precipitation is expected to be light overnight, and there may be some sunny breaks during the day Monday. Strong gusty west winds overnight should decrease to moderate SW during the day.Tuesday: The next Pacific system is expected to bring 10-15 mm during the day to the western parts of the region. The eastern parts of the region may only see 2-5 mm. Strong SE winds at the beginning of the storm should clock to the SW and continue strong with very strong gusts.Wednesday: Precipitation amounts should be light in the wake of the storm and freezing levels should drop down to near the valley bottom.
Avalanche Summary
Some avalanches up to size 1.0 have been reported from explosive control, releasing wind slabs down about 20 cms on NE aspects.
Snowpack Summary
Report of a 10 cm stubborn wind slab on NE aspects in the alpine. Variable reports of a surface hoar layer that developed last week and was buried on the 28th; releases are likely on this layer if you have it in your area. There is a surface hoar layer that developed during mid-november was reported to be active last week, but has not been reactive during the recent storm. There is a rain crust near the ground that we're calling the early November crust. There are some facets below it, or it may appear as a sandwich of crusts and facets, but it's been reported as unreactive at this time. There is still a sharp transition in snow depth from treeline to below treeline making back-country travel challenging under 1300 m in elevation.
Problems
Storm Slabs
Aspects: North, North East, East, South East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 3rd, 2012 2:00PM