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Avalanche Forecast

Archived

Dec 25th, 2024–Dec 26th, 2024

Alpine
Natural avalanches possible, human triggered probable.
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, Kispiox, Ningunsaw, Ningunsaw, Ningunsaw, North Bulkley, South Bulkley, South Bulkley, South Bulkley, Telkwa.

New snow is adding up and observations are limited. Monitor wind effect and the reactivity of new snow as you travel and seek out sheltered snow to stack the odds in your favour.

Confidence

Moderate

Avalanche Summary

Skiers remote-triggered a large wind slab from 100 m away in the Little Simpson area on Hudson Bay Mountain on Monday. It failed on faceted snow and is a concerning example of the snowpack's current potential.

Up north, a 20 - 40 cm deep layer of surface hoar on the early-December crust was reactive to skiers in the Ningunsaw area recently and produced a large natural avalanche in the same area on Monday.

Please share your own observations on the Mountain Information Network.

Snowpack Summary

Light new snow amounts have been adding to existing wind slabs and to otherwise heavily wind affected surfaces in the alpine and at treeline.

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 the distribution of this surface hoar across the region. Faceted snow is perhaps more likely to find at this interface and poses a similar problem.

Check out this helpful MIN report.

Weather Summary

Wednesday night

Cloudy with continuing flurries bringing up to 5 cm of new snow. 30 to 40 km/h south ridgetop wind. Freezing level 900 m.

Thursday

A mix of sun and cloud with isolated flurries. 15 to 30 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Friday

Partly cloudy. 20 to 30 km/h south ridgetop wind. Treeline temperature -4 °C.

Saturday

Cloudy with isolated flurries. 20 to 30 km/h southeast ridgetop wind. Treline temperature -6 °C.

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.
  • Remote triggering is a concern; avoid terrain where triggering overhead slopes is possible.

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.