Avalanche Forecast
Issued: Nov 28th, 2011 9:41AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Storm Slabs.
ghelgeson,
Avalanche Canada
Summary
Confidence
Fair - Due to limited field observations
Weather Forecast
25 cm to 70 cm expected from 4pm Mon - 4pm Tue.
Avalanche Summary
Control work in the North on Bear Pass on Sunday produced numerous dry loose snow avalanches size 1 -2, 15-30 cm in depth on SW - S aspects. One Xh size 2.5: 50 w x 1200 L x 100-150cm depth. To the South, Shames reported a Na SL sz 3.0, E @1300 m. 250 w x 1700 long. Failing on Nov11-19 SH. Other control work produced results very similar to that in the North.
Snowpack Summary
Saturdays system dumped another 50-75cm in many areas. Sunday brought another 25 - 35cm to upper elevations. The snowpack depth near treeline is already around 300cm. Fluctuating freezing levels and varying precipitation intensity and wind throughout the recent storms has probably resulted in various weaknesses within upper snowpack. A buried surface hoar layer may be found down close to 100/150cm, but there is no recent information on the presence and sensitivity of this layer. The mid and lower snowpack is generally well settled/strong with an old rain crust near the ground.
Problems
Wind Slabs
Aspects: North, North East, East, South East, South, South West, West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Storm Slabs
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Nov 29th, 2011 8:00AM
