Avalanche Forecast
Issued: Jan 2nd, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
lbaker,
Avalanche Canada
Use caution in wind-loaded areas at upper elevations. Recently formed wind slabs may not bond well to old, faceted surfaces below and could be reactive to human triggering.
Summary
Confidence
Moderate
Avalanche Summary
No new avalanches have been reported recently. Backcountry users will likely see evidence of a natural avalanche cycle from this weekend's storm if they head out.
Continue to support your backcountry community and please consider submitting a MIN report.
Snowpack Summary
25-35 cm of storm snow and moderate southerly winds have built deep pockets of windslab in open areas.
In the mid-pack, down around 50 to 70cm, it could be possible to find a thin layer of facets between old wind slabs. This layer recently produced sudden results in snowpack tests.
The height of the snowpack is variable. In areas lee of the prevailing wind, depths of up to 170cm can be found. At the lower elevation treeline terrain, snow depths decrease and are estimated at 60-90 cm.
Weather Summary
Monday Night
Cloudy with light flurries, 2 cm accumulation. Ridgetop winds southerly 30 to 50 km/h. High of -6 at 1500m.
Tuesday
Cloudy with light flurries, 2 cm accumulation. Outflow winds at the surface develop midday. Ridgetop winds southerly 20 to 40 km/h. High of -7 at 1500m.
Wednesday
Cloudy with light flurries, 2 cm accumulation. Southerly winds 20 km/h. High of -7 at 1500m.
Thursday
Cloudy with the possibility of isolated flurries near White Pass. Light variable ridgetop winds. High of -15 at 1500m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Seek out sheltered terrain where new snow hasn't been wind-affected.
- Expect slab conditions to change drastically as you move into wind exposed terrain.
- Carefully monitor the bond between the new snow and old surface.
Problems
Wind Slabs
+25 cm of storm snow, mild temperatures and moderate southerly winds have built deep cohesive slabs in lees. Expect to find large, reactive wind slabs on west, north and east aspects. Use ridges and ribs to avoid wind-loaded areas.
Aspects: North, North East, East, West, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 3rd, 2023 4:00PM
