Avalanche Forecast
Issued: Dec 1st, 2011 9:22AM
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
Friday- Minimal snow expected. Winds moderate to strong from the north. Freezing level at about 550m.Saturday/Sunday- A ridge is expected to dominate the region bringing high cloud, very limited precipitation, moderate northerly winds and freezing levels at, or near surface.
Avalanche Summary
Widespread size 2 natural activity reported from the region on wednesday. Any observations from the field are welcome. Please send to forecaster@avalanche.ca
Snowpack Summary
Expect to find around 200cm of snow near treeline. In the alpine there's either more or less depending on local wind patterns. I suspect last weekend's storm snow is settling into place and gaining strength. The snow and wind that occurred over the last few day will have created pockets of touchy windslab that will be lingering on lee and cross-loaded features at treeline and in the alpine; forecast strong N'ly winds may reverse & complicate the pattern with E through S facing slopes building new ones. I don't know much about the mid-pack but I suspect it's building strength. Closer to the ground is the early November surface hoar; somewhere around 50 cm above ground or 150 cm below the surface. It may be difficult to trigger this layer but has a sudden planar characteristic. I also suspect a lingering rain crust down there. It's still November (just barely), so we only have a teenage snowpack at best: variable, unpredicable, maybe moody. I suggest giving the snowpack a few days to reveal its secrets.
Problems
Wind Slabs
Aspects: North, North East, East, South East, South, South West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 2nd, 2011 8:00AM