Avalanche Forecast
Issued: Jan 6th, 2024 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
ejones,
Avalanche Canada
Assess for wind-affected snow before committing to consequential terrain.
A buried crust could make wind slabs more reactive to rider triggering.
Summary
Confidence
Moderate
Avalanche Summary
Recent winds have built triggerable slabs on many aspects.
Friday, near Ningunsaw, skiers were able to trigger size 1-2 avalanches on west and southwest-facing slopes in the alpine and treeline, between 20 and 50 cm deep. One failed up to 100 cm deep. It is suspected to have failed on the weak layer described in the Snowpack Summary.
Wind slab avalanches were also triggered by skiers on Thursday near Terrace, up to 50 cm deep on north and east-facing convexities at treeline.
Snowpack Summary
Storm totals have reached 20 to 60 cm, greatest in the west of the region. Varied winds have blown this new snow into deeper and touchier deposits on a variety of aspects.
This snow overlies a melt-freeze crust which extends up to 1600 m. Newly formed slabs may not be well bonded to this crust.
In the North of the region, there may be a deeper crust that could act as a weak layer, buried up to 100 cm deep.
South, and closer to Terrace, the remainder of the snowpack is reportedly strong with various hard crusts. Check out this MIN report describing conditions in the backcountry near Shames.
Snow depths are highly variable throughout the region, ranging from 100 to 300 cm at treeline and tapering rapidly below.
Weather Summary
Saturday Night
Partly cloudy with a trace of snow in the southwest, north alpine wind 10 to 20 km/h, treeline temperature -5 ºC.
Sunday
A mix of sun and cloud with no precipitation, northwest alpine wind 10 to 20 km/h, treeline temperature -9 ºC.
Monday
Cloudy with 5 to 10 cm snow, southwest alpine wind 20 to 40 km/h, treeline temperature -6 ºC.
Tuesday
Partly cloudy with no precipitation, north alpine wind 20 to 30km/h, treeline temperature -8 ºC.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Carefully evaluate steep lines for wind slabs.
- Wind slabs may be poorly bonded to the underlying crust.
- Choose low-angled, sheltered terrain where new snow hasn't been wind-affected.
Problems
Wind Slabs
Recent variable winds have built triggerable slabs on many aspects; near ridgetop, in cross-loaded areas and on steep rollovers.
In the north, it may be possible to trigger slabs that fail on a deeper weak layer, up to 100 cm deep.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 7th, 2024 4:00PM
