Avalanche Forecast
Issued: Dec 7th, 2020 8:04AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Storm Slabs and Deep Persistent Slabs.
Chris Gooliaff,
Danger ratings are increasing today with the incoming storm. Weather models are uncertain, but if heavy snow and winds develop during the day, danger levels will rise rapidly.
If it starts dumping, make conservative choices.
Summary
Weather Forecast
A storm front will make its way across BC today, bringing snow later this afternoon and through tomorrow.
Today: Flurries beginning near noon, 8cm. FZL 1400m. Wind SW-35km/h
Tonight/Tuesday: Snow, 20cm. FZL 1400m. Wind SW 35 km/h gusting to 60 km/h
Wed: Cloudy with scattered flurries, FZL 1000m, light W winds
Snowpack Summary
A surface crust on steep solar aspects is currently being buried by the incoming storm. Dry powder sits on shaded aspects. At TL and below, surface hoar exists on the surface to sz 8.0mm, with buried layers down 10cm (size 5-7mm) and down 40cm (size 3mm). The Nov 5th crust is prominent, widespread up to 2500m, and sits under more than 1m of snow.
Avalanche Summary
No new avalanches observed in the highway corridor nor in the backcountry.
Confidence
Problems
Storm Slabs
These won't be found until we get the main brunt of the storm. If the storm arrives earlier today and with more snow, this will bump the danger rating up a level. If it starts dumping with significant winds, reduce your exposure to overhead hazard.
- Use caution in lee areas in the alpine and treeline. Storm snow is forming slabs.
Aspects: North, North East, East, South East, North West.
Elevations: All elevations.
Likelihood
Expected Size
Deep Persistent Slabs
This is a low probability, high consequence scenario. This layer is still within the triggerable range for a skier or rider in shallow areas, like scoured ridge-crests that are adjacent to fatter pockets.
- Avoid shallow snowpack areas where triggering is more likely.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 8th, 2020 8:00AM
