Avalanche Forecast

Issued: Jan 3rd, 2024 4:00PM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is low. Known problems include Persistent Slabs and Wind Slabs.

Avalanche Canada ejones, Avalanche Canada

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Watch 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

An icon showing 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

Possible

Expected Size

1 - 2.5

Wind Slabs

An icon showing 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

Possible - Likely

Expected Size

1 - 1.5

Valid until: Jan 4th, 2024 4:00PM

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