Avalanche Forecast
Issued: Mar 12th, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
TRettie,
Avalanche Canada
Continue to assess the wind slab hazard as you move through terrain.
Summary
Confidence
Weather Forecast
Saturday night: no new snow expected. Moderate southwest winds and a low of -3 at 1600m.
Sunday: cloudy with flurries bringing up to 10cm of snow and light westerly winds. Freezing levels rising to 1800m.
Monday: stormy with up to 20cm of new snow expected with moderate to strong southwest ridgetop winds. High of -1 at 1600m.
Tuesday: stormy with up to 15cm of new snow at higher elevations. Moderate to strong southwest winds and freezing levels rising to 1700m.
Avalanche Summary
On Friday one sled triggered size two slab avalanche was reported. This avalanche was triggered in an open treeline feature on a west aspect and is believed to have failed on the late January layer.
On Tuesday a group of skiers remotely triggered a slab avalanche on an east aspect near ridgetop. We suspect it failed on facets above a crust. Wind loading above this layer was a factor.
Snowpack Summary
Wind slab in exposed treeline and alpine terrain from southwest winds. Moist snow could be observed below treeline.
A crust from earlier this month exists down 10 to 20cm on south aspects and below 1800m. A more substantial crust from the start of March is down 30cm in the southern part of the region.
The late January surface hoar layer is down around 100cm.
Terrain and Travel
- Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
- Use ridges or ribs to avoid areas of wind loaded snow.
Problems
Wind Slabs
wind slab can be found in exposed treeline and alpine terrain. Sensitivity to triggering could be greater where wind slab has formed over a crust.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Mar 13th, 2022 4:00PM
