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Avalanche Forecast

Archived

Dec 23rd, 2025–Dec 24th, 2025

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

Kispiox, Microwave-Sinclair, North Bulkley, South Bulkley, Telkwa.

Use caution around large open slopes. Buried surface hoar is lurking in the snowpack and can be hard to detect.

Confidence

Moderate

  • Uncertainty is due to the fact that persistent slabs are particularly difficult to forecast.

Avalanche Summary

Several natural and human-triggered wind slabs occurred during last week’s storms (see photos), but no new avalanches were reported over the weekend. No persistent slab avalanches have been reported in the past week, leaving uncertainty about this problem.

Snowpack Summary

Variable winds have created mixed conditions. Open areas are heavily wind affected, while sheltered terrain still holds soft powder.

A Dec 14 rain crust is buried up to about 1400 m, and a widespread November surface hoar layer lies 60 to 100 cm deep in sheltered treeline areas. While no recent avalanches have involved this layer, some snowpack tests results have been concerning.

Weather Summary

Tuesday Night
Mostly cloudy. 0 to 1 cm of snow. 40 km/h southeast ridgetop wind. Treeline temperature -16 °C.

Wednesday
Mix of sun and clouds. 0 to 1 cm of snow. 40 km/h east ridgetop wind. Treeline temperature -14 °C.

Thursday
Mostly sunny. 20 km/h southwest ridgetop wind. Treeline temperature -15 °C.

Friday
Mix of sun and clouds. 0 to 1 cm of snow. 20 km/h northwest ridgetop wind. Treeline temperature -18 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Cautiously approach steep slopes that are open or sparsely treed.
  • Use ridges or ribs to avoid areas of wind-loaded snow.
  • Surface hoar distribution is highly variable. Avoid generalizing your observations.

Problems

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.

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.