Avalanche Forecast
Issued: Mar 20th, 2013 4:00PM
The alpine rating is Storm Slabs, Persistent Slabs and Cornices.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Weather Forecast
A system tonight could deliver another 10-20 cm with moderate west wind creating new wind slabs and adding to existing slabs. In some areas, this could be enough to overload existing weaknesses and another natural cycle may result. Winds will flip to moderate NW as the system passes and temperatures will cool. Skies will clear for the weekend.
Snowpack Summary
Over the past week, 60-80 cm of snow has fallen in the region with strong West winds. The storm snow is starting to bond to underlying layers West of the divide, but still may be of concern steeper features where the interface is a suncrust. East the divide, storm snow is a cohesive slab resting on a weak faceted snowpack.
Avalanche Summary
Yesterday a size 2.5 was noted in Redoubt bowl (near Lake Louise ski area) with a 400 m wide propagation with a crown 60-80 cm thick. Generally, natural activity has tapered, only a few naturals to size 2 were reported in the area yesterday in steeper alpine lee terrain. Skier triggering of recently developed slabs remains possible to likely.
Confidence
Intensity of incoming weather systems is uncertain
Problems
Storm Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Cornices
Aspects: North, North East, East, South East, South.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Mar 21st, 2013 4:00PM