Avalanche Forecast
Issued: Dec 3rd, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Storm Slabs.
ahanna,
Avalanche Canada
Storm slab avalanches are primed for human triggering. Stick to mellow terrain and be prepared to back off if you encounter signs of instability.
Summary
Confidence
Avalanche Summary
Human triggered storm slab avalanches are possible as mild temperatures promote settlement in the recent snow.
On Saturday, signs of instability like whumphing and shooting cracks were observed in the recent storm snow. If you're heading out in the backcountry, please consider sharing any observations on the Mountain Information Network 🙏
Snowpack Summary
20-40 cm of recent snow is settling in the mild temperatures. It sits over various layers of crusts and old faceted snow and may also overlie isolated pockets of surface hoar in sheltered areas.
Treeline snowpack depths in the range of 80-100 cm in the Coquihalla area.
Weather Summary
Sunday night
Up to 5 cm of new snow in most areas, 10 cm in the Coquihalla. Moderate southwest wind. Freezing level 1300 m.
Monday
Up to 5 cm of new snow in most areas, 10 cm in the Coquihalla. Light to moderate southwest wind. Freezing level rising to 3000m.
Tuesday
Rain overnight (10-30 mm) becoming mixed precip in the morning (10-25 mm). Moderate to strong southwest wind. Freezing level dropping from 3000 m to 1800 m.
Wednesday
A mix of sun and cloud. Light wind. Freezing level 1500 m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Carefully monitor the bond between the new snow and old surface.
- Watch for signs of instability like whumpfing, hollow sounds, shooting cracks or recent avalanches.
- Early season avalanches at any elevation have the potential to be particularly dangerous due to obstacles that are exposed or just below the surface.
Problems
Storm Slabs
Human triggered storm slab avalanches are possible as mild temperatures promote settlement in the recent snow. Triggering is most likely where there is a poor bond between the recent snow and underlying surfaces.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 4th, 2023 4:00PM
