Avalanche Forecast
Issued: Mar 22nd, 2012 4:00PM
The alpine rating is Wind Slabs, Cornices and Loose Wet.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Fair - Due to limited field observations
Weather Forecast
A ridge of high pressure should maintain mostly sunny and dry conditions for the next several days. The freezing level will drop to valley bottom overnight and rise to 800-1000m during the day. Ridge top winds should be generally light from the south.
Avalanche Summary
No new slab avalanches have been reported in the past day or two, although observations are limited. Loose dry sluffing was observed in steep terrain. There were also a few reports of cornice failures on the weekend, but most did not trigger slabs.
Snowpack Summary
Up to 25cm of new snow covers the previous surface which included a sun crust on southerly aspects, surface facets or surface hoar in cool shady areas, and pockets of wind slab in exposed terrain. Moderate southerly winds have created new wind slabs in lee and cross-loaded terrain. The mid February persistent weak layer interface, comprised of spotty surface hoar, facets and crusts, is buried 80-120 cm below the surface. No recent activity has been reported on this interface. However, recent snowpack tests have been giving hard but sudden "pop" results and indicate it is has the potential to react given the right trigger in the right place. For route selection, it should still be on your radar and is more likely to be triggered on steeper, unsupported terrain. Cornices in the area are reported to be very large and primed for natural collapse or triggering by a person.
Problems
Wind Slabs
Aspects: North, North East, East, South East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Cornices
Aspects: North, North East, East, South East.
Elevations: Alpine.
Likelihood
Expected Size
Loose Wet
Aspects: North, North East, East, South East.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Mar 23rd, 2012 9:00AM