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Avalanche Forecast

Archived

Feb 24th, 2026–Feb 25th, 2026

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Northwest Inland, Nass, Seven Sisters, Howson, Kispiox, Ningunsaw.

Minimize exposure to avalanche terrain and overhead hazard. Snow and wind are expected to build sensitive storm slabs.

Buried weak layers may become more reactive as load increases.

Confidence

Moderate

  • We are confident the likelihood of avalanches will increase with the forecast weather.
  • We are uncertain about how persistent slabs will react to the forecast weather.

Avalanche Summary

Natural wind slabs were reported on Monday up to size 2.5, likely occurring during strong winds.

A remotely triggered size 2.5 persistent slab was reported on Sunday on a west aspect at treeline, failing on buried weak layers.

Moving forward, avalanche likelihood will increase as storm totals rise. Natural activity is most likely in heavily wind affected terrain.

Snowpack Summary

By Wednesday afternoon, storm totals are expected to reach 15-30 cm, falling on heavily wind-affected surfaces of hard snow and old crusts.

Crust, facet and spotty surface hoar layers exist in the upper metre of the snowpack. These layers are most concerning at treeline and below, especially in inland areas where the snowpack thins.

A January crust and facet layer is buried 100 to 200 cm deep. Below, the remaining snowpack is generally well settled and well bonded.

Weather Summary

Tuesday Night
Cloudy. 10 to 15 cm of snow. 60 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Wednesday
Cloudy. 4 to 15 cm of snow. 60 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Thursday
Mostly cloudy. 15 to 25 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -7 °C.

Friday
Mix of sun and clouds. 2 to 3 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -12 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • As the storm slab problem worsens, the easy solution is to choose more conservative terrain.
  • Be aware of the potential for large avalanches due to buried weak layers.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.

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.