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Avalanche Forecast

Archived

Dec 21st, 2024–Dec 22nd, 2024

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Inland, Boundary, Kispiox, Ningunsaw, Ningunsaw, Ningunsaw, North Bulkley, South Bulkley, South Bulkley, South Bulkley, Telkwa.

Strong southerly winds may form reactive wind slabs on leeward slopes at treeline and above.

Whumpfing and shooting cracks in the snowpack are indicators of unstable conditions.

Confidence

Low

Avalanche Summary

No new avalanches have been reported.

Observations have been limited. Please consider sharing your observations through the Mountain Information Network.

Snowpack Summary

Up to 20 cm of fresh snow sits above colder, faceted and wind-affected snow. Changing winds may have formed fresh wind slabs at treeline and above.

The crust from early December is now buried 20 to 40 cm. In some areas, large surface hoar crystals are found at this interface. We are trying to track this surface hoard distribution across the region - most recently, the layer was reactive to skiers in the Ningunsaw area.

Below, the lower snowpack has no layers of concern.

Weather Summary

Saturday night

Cloudy. 35 to 50 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level valley bottom.

Sunday

Cloudy with isolated flurries 2 to 5 cm. 35 to 60 km/h southeast ridgetop wind. Treeline temperature -2 °C. Freezing level valley bottom.

Monday

Mix of sun and cloud. 30 gusting to 75 km/h south ridgetop wind. Treeline temperature -2 °C. Freezing level 1000 m.

Tuesday

Mix of sun and cloud with light flurries up to 5 cm. 25 gusting to 65 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep terrain.
  • Seek out wind sheltered terrain below treeline where you can avoid wind slabs and find great riding.
  • Small avalanches can have serious consequences in extreme terrain. Carefully evaluate your line for slabs before you commit to it.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.