Avalanche Forecast
Issued: Dec 20th, 2024 4:00PM
The alpine rating is Storm Slabs.
, the treeline rating is , and the below treeline rating is Known problems includePractice good travel habits and seek out terrain sheltered from the wind.
Summary
Confidence
Moderate
Avalanche Summary
Numerous storm and wind slab avalanches were reported in the Okanagan on Wednesday and Thursday. Rider-triggered avalanches were small and explosive-triggered slabs were large, size 2 to 3.
While we suspect these slabs are stabilizing, uncertainty remains due to forecast snow and wind, as well as limited information about the snowpack across the region.
Snowpack Summary
Alpine terrain is heavily wind-affected, while sheltered areas have 30 to 40 cm of settling snow from Wednesday's storm.
A mix of rain and sun crusts is present beneath the recent snow, with reports of isolated surface hoar at these depths in neighbouring regions. Limited observations suggest good bonding, but uncertainty remains about how these layers may affect storm slab reactivity.
Treeline snow depths in the Okanagan region average 100 cm.
Weather Summary
Friday Night
Cloudy with up to 1 cm of snow. 20 to 30 km/h south ridgetop wind. Treeline temperature -2 °C. Freezing level 1800 m.
Saturday
Cloudy with up to 3 cm of snow. 30 to 40 km/h southeast ridgetop wind. Treeline temperature -2 °C. Freezing level 1900 m.
Sunday
Mostly cloudy with up to 5 cm of snow ending in the morning. 20 to 40 km/h south ridgetop wind. Treeline temperature -4 °C.
Monday
A mix of sun and cloud with up to 5 cm of snow ending in the morning. 20 to 40 km/h south ridgetop wind. Treeline temperature -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.
- Stay off recently wind loaded slopes until they have had a chance to stabilize.
- Investigate the bond of the recent snow before committing to your line.
Problems
Storm Slabs
Storm slabs are 30 to 40 cm thick, and thicker on wind-loaded slopes. There is uncertainty about their reactivity.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Dec 21st, 2024 4:00PM