Avalanche Forecast
Issued: Dec 18th, 2016 8:00AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
Percy Woods,
Parks Canada
A slow warming trend is underway. Warming temperatures and a pulse of snow forecast to start tonight will raise the avalanche hazard significantly.
Summary
Weather Forecast
Mainly cloudy with isolated flurries. Alpine temperatures should reach a balmy -13C accompanied by moderate SW winds. A pulse of moisture tonight through Tuesday will lead to an increasing avalanche danger.
Snowpack Summary
Continued moderate S'ly winds are developing thin windslabs in the immediate lee of ridges and along alpine slopes. These slabs are forming over the hard windslabs that formed when the arctic high pressure moved in. Flurries will be falling on needle like surface hoar in many locations below treeline.
Avalanche Summary
Three slab avalanches ranging from size 1-2.5 were recorded in the highway corridor yesterday.
Confidence
Timing, track, or intensity of incoming weather system is uncertain
Problems
Wind Slabs
Freshly formed windslabs brought on by moderate S'ly winds and light snowfall should be watched for in the immediate lee of ridges and alpine terrain features. These slabs will hide hard slabs formed during the arctic high pressure.
Be cautious as you transition into wind affected terrain.Be careful with wind loaded pockets
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 19th, 2016 8:00AM
