Avalanche Forecast
Issued: Dec 14th, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
lbaker,
Avalanche Canada
Heightened avalanche conditions exist on wind loaded terrain in the alpine. Avoid freshly loaded features, especially around ridge crests, roll-overs and steep terrain.
Summary
Confidence
Avalanche Summary
On Thursday, a few skier controlled, size 1 storm slab avalanches were reported by operators. A few size 1- 1.5 natural wind slab avalanches were observed, with 20-30 cm crowns, in northwest lee features at 2000 m. These are suspected to have run on the crust buried 30 cm deep.
If you're heading out in the backcountry, please consider sharing any observations on the Mountain Information Network.
Snowpack Summary
10 cm of storm snow covers a 1-2 cm thick melt-freeze crust that extends well into the alpine. In sheltered areas, a layer of surface hoar may be found above the crust.
At treeline and above there are two layers of concern in the mid-pack. Both layers consist of a crust that tapers at higher elevations covered by a layer of fragile surface hoar in sheltered areas. These are found down around 40 cm and 60 cm consecutively. No recent avalanche activity has been reported on these layers but it continues to be reactive in snowpack tests.
Overall, the snow depth remains relatively shallow, with numerous hazards present at or just below the snow surface across all elevations.
Weather Summary
Thursday Night
Partly cloudy with no precipitation, southwest ridgetop wind increases from 20 to 40 km/h through the night, treeline temperature -2 °C, freezing level 1000 m.
Friday
Mainly cloudy with isolated flurries bringing mixed precipitation, 1 to 4 cm accumulation, southwest alpine wind 40 km/h, treeline temperature 0 °C, freezing level rising to 2000 m through the day.
Saturday
Mix of sun and cloud with isolated flurries, trace accumulation, southwest alpine wind 50 km/h, treeline temperature +1 °C, freezing level 2000 m.
Sunday
Mainly sunny with no precipitation, west alpine wind 30 to 40 km/h, treeline temperature +3 °C, freezing level 3000 m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
- Wind slabs are most reactive during their formation.
- Back off if you encounter whumpfing, hollow sounds, or shooting cracks.
Problems
Wind Slabs
10 cm of storm snow and strong southwest winds are redistributing 10 cm of recent snow into wind slabs in lee terrain features.
Aspects: North, North East, East, South East, West, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 15th, 2023 4:00PM
