Avalanche Forecast
Issued: Dec 22nd, 2012 9:39AM
The alpine rating is Storm Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Poor - Forecast snowfall amounts are uncertain on Sunday
Weather Forecast
Sunday: Moderate snowfall on Saturday night should ease to light snowfall by Sunday / Moderate southeast winds / Freezing level at surfaceMonday: Mostly clear skies / Light southeast winds / Freezing level at surfaceTuesday: Light to moderate snowfall / Light southeast winds / Freezing level at surfaceConfidence: Generally good for the overall pattern / Poor for specific snowfall amounts on Saturday night/ Sunday morning
Avalanche Summary
Explosives controlled avalanches to size 2 were observed in the region in the last 2 days. I'm unaware of any significant recent natural activity. All avalanche activity observed was within the recent storm snow.
Snowpack Summary
The region has seen a daily supply of moderate to locally heavy snow accumulations over the past week. In the alpine and in exposed areas at treeline, the new snow most likely exists as a windslab. The recent snow has been settling well; however, weaknesses may still exist within the storm interfaces.A layer of surface hoar buried on Dec 10 exists at treeline in the Duffey Lake area and may be more widespread. A bit deeper in the mid snowpack you might find a surface hoar layer from late November; however, tests seem to be showing limited reactivity on this layer. A generally consolidated mid-pack overlies the deeply buried November crust/facet layer which does not seem to be reactive as of late. This layer has not been observed in the Coquihalla area.
Problems
Storm Slabs
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Dec 23rd, 2012 2:00PM