Avalanche Forecast
Issued: Nov 17th, 2012 4:00PM
The alpine rating is Wind Slabs and Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeThe strength of the SW flow seems to ebb by the time it arrives in our region. As a result, expect little change unless we receive a good pulse of moisture on Monday.
Summary
Weather Forecast
Forecast models indicate the main pulse of moisture may pass further to the south of our region. Expect unsettled weather Sunday with a pulse of snow (15-20cm) Monday. Freezing levels will drop to valley bottom, winds will be strong from the SW
Snowpack Summary
The new snow that may fall on Sunday/Monday will be accompanied by strong SW winds. This will likely create touchy soft/hard slabs at alpine and treeline elevations, especially in lee features. Pay attention to the amount of snow that is falling, as well the ridge-top winds above you.
Avalanche Summary
No natural activity reported today.
Confidence
Problems
Wind Slabs
With the strong winds and snow forecasted, new soft slabs will begin forming on Sunday in alpine and treeline locations. These new slabs will initially be touchy. Currently, slabs that are found in lee features have been stubborn to move.
- Avoid freshly wind loaded features.
- Be careful with wind loaded pockets while approaching and climbing ice routes.
Aspects: North, North East, East, South East, South.
Elevations: Alpine.
Likelihood
Expected Size
Persistent Slabs
Deep slabs size 2-3 have been noted on isolated steep alpine slopes over the past week. Failure plane was at the bottom of the snow pack on firn or glacier ice. No new have been reported these last few days but are still possible in the high alpine.
- Be aware of the potential for full depth avalanches due to deeply buried weak layers.
Aspects: North, North East, East.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Nov 18th, 2012 4:00PM