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.
llarson,
Avalanche Canada
Storm slabs may be deeper than expected, with moderate winds accompanying recent storms. Keep an eye out for touchy storm slabs in alpine, treeline, and upper below treeline elevations.
Summary
Confidence
No Rating
Avalanche Summary
Storm slabs formed throughout the day Saturday were reactive to skiers where the new snow has not bonded well to the large surface hoar layer.
On Saturday and Sunday, several size 1 to 1.5 storm slabs were skier-triggered, and a size 2 was remotely triggered in the Fernie area. This MIN post from Saturday in Orca bowl is further evidence that storm slabs are reactive to human triggers.
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Snowpack Summary
20 to 25 cm of new snow has buried a surface hoar layer that developed on various surfaces of wind-pressed snow, sun crust, and facets.
The snowpack is shallow and faceted, with depths of 60 to 80 cm at treeline and the upper end of below treeline. Below this snowpack depths taper quickly.
Weather Summary
Sunday Night
Cloudy with scattered flurries, 2 to 4 cm of new snow. Southwest alpine wind 20 to 30 km/h. Treeline temperature -5 °C.
Monday
Cloudy with scattered flurries 1 to 2 cm accumulation. Southwest alpine wind 30 to 40 km/h. Treeline temperature -3 °C. Freezing level 1300 m.
Tuesday
Cloudy with mixed precipitation, snow Monday evening turning to rain with rising freezing levels to 2500 m, 30 to 45 cm accumulation possible above 2000 m. Southwest wind 30 to 40 km/h. Treeline temperature 3 °C.
Wednesday
Cloudy with snow above 2000 m, 15 to 20 cm accumulation. Southwest alpine winds 15 to 20 km/h. Treeline temperatures 2 °C. Freezing level 2000 m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Storm snow and wind is forming touchy slabs. Use caution in lee areas in the alpine and treeline.
- 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
20 to 25 cm of new snow has developed touchy storm slabs where new snow has buried surface hoar and facets that formed on hard wind-pressed and melt-freeze crusts.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 4th, 2023 4:00PM
