Avalanche Forecast
Issued: Dec 10th, 2023 4:00PM
The alpine rating is Wind Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeStrong winds will likely build reactive slabs around ridgelines and mid slope rollovers.
Summary
Confidence
Moderate
Avalanche Summary
Natural and human triggered avalanche activity has tapered off.
Human triggered avalanches are still possible at higher elevations, where slabs sit over the weak surface hoar.
Snowpack Summary
The recent 30-40 cm of storm snow has likely been redistributed into deeper deposits on north and east facing slopes at higher elevations. This sits over a rain crust that has been observed to ridgeline in most areas.
A layer of surface hoar is now buried 50-80 cm deep. The recent rain crust is thought to limit avalanches on this persistent weak layer. However, it may be possible to trigger this in isolated terrain features, or for small avalanches to step down to this layer.
The lower snowpack is a mix of rounded and faceted grains. A hard crust may be found near the ground.
Treeline snowpack depths are variable and generally range between 60 and 100 cm. Snowpack tapers rapidly as you move lower in elevation.
Weather Summary
Sunday Night
Cloudy with another 5 cm of snow possible. Westerly winds, 20-40km/h.
Monday
Mostly cloudy with no snow expected. Light and variable winds. Treeline temperatures reach -5 °C.
Tuesday
Mostly clear skies with no snow expected. Light and variable winds. Treeline temperatures reach -5 °C.
Wednesday
Mostly clear skies with no snow expected. Light and variable winds. Treeline temperatures reach -4 °C.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Continue to make conservative terrain choices while the storm snow settles and stabilizes.
- Carefully assess open slopes and convex rolls where buried surface hoar may be preserved.
- Use careful route-finding and stick to moderate slope angles with low consequences.
Problems
Wind Slabs
Storm snow overlies a rain crust. Winds have built deeper and more reactive slabs in north and east facing terrain features.
Aspects: North, North East, East, South East, West, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 11th, 2023 4:00PM