Avalanche Forecast
Issued: Dec 2nd, 2019 8:00AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Persistent Slabs.
Kate Ryan,
Parks Canada
Hazard may increase throughout the day if the incoming storm arrives earlier than forecast.
Keep an eye for changing conditions today.
Summary
Weather Forecast
Today: A mix of sun and cloud with isolated flurries. Freezing level 800m. Moderate SW winds.
Tonight: We move into an unsettled westerly flow. 7 cm forecast with moderate SW winds. Freezing level steady at 800m
Tuesday: Storm continues with another 14 cm forecast with continued moderate SW winds.
Sunset time is currently 15:50hrs, plan accordingly.
Snowpack Summary
8cm of snow overnight covers a facetted upper snowpack and previously wind affected surfaces. The main layer to watch (Nov 23rd surface hoar/ crust) is buried 25-45cm. This layer exists as a crust on all aspects below 1600m and on steep solar aspects into the alpine; surface hoar around treeline.
Avalanche Summary
Artillery verification shoot yesterday produced no results in steep, north alpine start zones. No new avalanches reported from the highway or the backcountry in the last 5 days.
Confidence
Problems
Persistent Slabs
A weak layer is down 25-45cm. It consists of surface hoar at treeline and below, and a crust on steep solar aspects into the alpine. Cold temps appear to have decreased slab properties in the upper snowpack, but this layer should not be discounted.
- Dig down to find and test weak layers before committing to a line.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 3rd, 2019 8:00AM
