Avalanche Forecast
Issued: Dec 13th, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
lbaker,
Avalanche Canada
Avoid freshly wind-loaded features, especially near ridge crest, rollovers, and in steep terrain.
Watch for reverse and cross-loaded areas as northerly winds pick up Wednesday and wind slabs become more widespread.
Summary
Confidence
Avalanche Summary
On Monday, a MIN from the Sun Peaks area reported a size 1 skier accidental avalanche in sparse trees. The slab consists of the recent wind-affected storm snow and looked to be 30 cm deep.
On Sunday explosives control triggered several size 1.5 wind slab avalanches on east slopes in the alpine. Avalanches released above a weak layer of surface hoar, crust, and faceted crystals.
Please submit a Mountain Information Network report if you are heading to the backcountry!
Snowpack Summary
20 - 30 cm of snow has been redistributed by southwest winds and has formed soft wind slabs in lees at higher elevations. As winds switch to the north watch for reverse loading and cross-loading in the surface slab. On south-facing slopes this snow sits on a sun crust and in sheltered terrain, it sits over a layer of weak surface hoar.
Buried 40 to 60cm deep, a layer of surface hoar, crust, and faceted crystals is a layer of concern. Observations are limited in this region but this layer has already produced avalanches in the neighboring regions.
Snowpack depths at upper treeline is around 80 - 100 cm.
Weather Summary
Tuesday Night
Mainly cloudy with isolated flurries, 2 cm accumulation. Northerly ridge wind 40 km/hr. Alpine temperatures, low of -10. Freezing levels valley bottom.
Wednesday
Sunny with cloudy periods. Northerly ridge wind 40 - 60 km/hr. Alpine temperatures, high of -8. Freezing levels valley bottom.
Thursday
Partly cloudy skies. Northwesterly ridge winds 40 - 60 km/hr. Alpine temperatures, high of -8. Freezing levels valley bottom.
Friday
Partly cloudy skies. Northwesterly ridge winds 40 - 60 km/hr. Alpine temperatures, high of -6. Freezing levels valley bottom.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Approach lee and cross-loaded slopes with caution.
- Use ridges or ribs to avoid areas of wind loaded snow.
Problems
Wind Slabs
20-30 cm of snow and varied wind directions have built winds on all aspects. Seek out wind-sheltered terrain where you can avoid wind slabs and find great riding.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 14th, 2022 4:00PM
