Avalanche Forecast
Issued: Jan 3rd, 2024 4:00PM
The alpine rating is Persistent Slabs and Wind Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeWatch for whumpfing and wind-loading. You can use conservative terrain choices if you observe these signs of instability.
Summary
Confidence
Moderate
Avalanche Summary
A few size 1 loose dry avalanches have been reported in extreme terrain. Otherwise, there have been no new avalanches reported.
Whumpfing has been experienced by backcountry users in the Babines, Grizzly Plateau, and Hudson Bay Mountain recently. The whumpfing is likely due to the surface hoar layers described in the snowpack summary.
Snowpack Summary
Check out this great MIN from the north of the region.
Up to 25 cm of soft snow exists in sheltered areas. Wind-exposed areas carry a variety of surfaces including wind-stiffened snow, an early-season crust, or completely scoured with the ground visible.
Below treeline, a crust exists at or near the surface.
In most areas, two or more preserved surface hoar layers can be found buried between 35 cm and 80 cm deep. They appear to be most prominent at treeline and below but have been observed in some alpine locations as well.
Snowpack depths at treeline are variable across the region with generally deeper amounts (~150cm) in the western part and shallower (~80cm) in the eastern part.
Weather Summary
Wednesday Night
Cloudy with 0 to 5 cm of new snow, south alpine winds 25 to 45 km/h, treeline temperature -5°C.
Thursday
Partly cloudy with a trace of new snow possible, southwest alpine winds 35 to 50 km/h, treeline temperature -4°C.
Friday
Cloudy with up to 5 cm of new snow expected, southwest alpine winds 30 to 50 km/h, treeline temperature -4°C.
Saturday
Partly cloudy with a trace of new snow possible, northwest alpine winds 10 to 20 km/h, treeline temperature -8°C.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Carefully assess open slopes and convex rolls where buried surface hoar may be preserved.
- Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
Problems
Persistent Slabs
Several buried surface hoar layers can be found 35 to 80 cm below the snow surface. This is only seems to be a problem above 1200m.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Wind Slabs
Southerly winds may form new and reactive wind slabs on north-facing slopes. Watch for cross-loaded features, rollovers and gullies.
Aspects: North, North East, East, West, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 4th, 2024 4:00PM