Avalanche Forecast
Issued: Dec 4th, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Storm Slabs.
mconlan,
Avalanche Canada
Warm air and rain may form a slab above a weak layer that could be touchy to riders.
Summary
Confidence
Low
Avalanche Summary
We haven't received any reports of avalanche activity in this region. Activity may increase with Monday night's stormy weather.
Snowpack Summary
Light snow will switch to rain Monday night, wetting the snow surface. Rain could rapidly destabilize the 10 to 20 cm of recent snow that overlies a widespread weak layer of feathery surface hoar.
The middle and base of the snowpack is generally weak and faceted.
Snowpack depths at treeline are approximately 50 to 70 cm. The snowpack tapers drastically with elevation below treeline.
Weather Summary
Monday Night
Cloudy with 2 to 5 cm of snow switching to light rain below 2500 m. Southwest alpine wind 40 km/h. Treeline temperature 0 °C.
Tuesday
Cloudy with trace snow or rain. Southwest alpine wind 20 to 40 km/h. Treeline temperature 1 °C. Freezing level dropping from 2500 m to 2000 m.
Wednesday
Cloudy with 2 to 5 cm of snow. South alpine wind 10 to 20 km/h. Treeline temperature -1 °C.
Thursday
Partly cloudy with trace snow. Northwest alpine wind 10 to 20 km/h. Treeline temperature -5 °C.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Closely monitor how the new snow is bonding to the old surface.
- Be aware of the potential for larger than expected storm slabs due to the presence of buried surface hoar.
- Extra caution for areas experiencing rapidly warming temperatures for the first time.
- Watch for rapidly changing conditions during periods of heavy loading from new snow, wind, or rain.
Problems
Storm Slabs
Warm air and rain may rapidly form a reactive slab that overlies a widespread weak layer. This will be most problematic at higher elevations where the snowpack is relatively smooth without major ground roughness.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Dec 5th, 2023 4:00PM
