Avalanche Forecast
Issued: Dec 6th, 2024 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Storm Slabs and Loose Wet.
Avalanche Canada,
Avalanche Canada
630 am update: Avalanche conditions will deteriorate on Saturday as a wet storm arrives.
If you see more than 30 cm of new snow at treeline, treat avalanche danger as HIGH.
Summary
Confidence
Low
Avalanche Summary
No recent avalanche activity has been reported.
On Saturday, we can expect to see natural loose wet and storm slab avalanches during the storm.
If you are going out in the backcountry, please consider filling out a Mountain Information Network (MIN) report.
Snowpack Summary
By mid-morning, heavy, wet snow begins to accumulate at upper elevations. Any old surface layers such as facets, surface hoar or thin crusts have likely been neutralized by the rainy start to the storm. Below 1000 m, rain soaks an already moist upper snowpack.
The mid and lower snowpack is generally well-settled and bonded.
Snow depths at treeline vary across the region. Around 90 cm is reported in the Coquihalla and 50 cm near Manning Park.
Weather Summary
Friday Night
Increasing cloud, light rain starting in early am. 50 to 70 km/h southwest ridgetop wind. Treeline temperature +4 °C. Freezing level dropping 3000 m to 2500 m.
Saturday
Rain turning to wet snow, 10 to 30 cm accumulation. 40 to 60 km/h southest ridgetop wind. Treeline temperature 0 °C. Freezing level dropping 2500 m to 1000 m.
Sunday
10 to 20 cm of snow. 20 to 40 km/h northwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1000 to 1300 m.
Monday
A mix of sun and cloud. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -5 °C. Freezing level 500 m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Watch for rapidly changing conditions during periods of heavy loading from new snow, wind, or rain.
- Watch for fresh storm slabs building throughout the day.
- As the storm slab problem worsens, the easy solution is to choose more conservative terrain.
- Keep in mind that the high density of wet avalanches can make them destructive.
Problems
Storm Slabs
Storm slab size and sensitivity to triggering will likely increase through the day as heavy, wet new snow accumulates .
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Loose Wet
Loose wet avalanches are possible in steep terrain while it's raining. It doesn't take a lot of heavy, wet snow to knock a rider of their feet, or worse.
Aspects: All aspects.
Elevations: Treeline, Below Treeline.
Likelihood
Expected Size
Valid until: Dec 7th, 2024 4:00PM
