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Avalanche Forecast

Archived

Feb 27th, 2026–Feb 28th, 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 avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
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.

Stick to conservative, low consequence slopes while the storm snow settles.

Human triggered avalanches are likely and natural avalanches are possible during active wind loading.

Confidence

Moderate

  • We are uncertain due to a limited number of field observations.

Avalanche Summary

A natural avalanche cycle occurred on Wednesday and Thursday, details of the extent of the cycle are limited as the recent weather has made for tough travel and poor visibility.

Naturally triggered persistent and storm slabs were observed up to size 3. These avalanches occurred on a variety of aspects and elevations.

Snowpack Summary

Recent storm totals are 30 to 60 cm. This snow has been accompanied by strong southwest wind, forming deeper deposits on north and east aspects. Windward slopes may be scoured back to an old crust. In sheltered features this snow could overlie surface hoar or a sun crust.

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 areas where the snowpack is shallower.

Below, the remaining snowpack is generally well settled and bonded.

Weather Summary

Friday Night
Partly cloudy. 1 to 2 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -11 °C.

Saturday
Cloudy. 3 to 5 cm of snow. 50 km/h west ridgetop wind. Treeline temperature -10 °C.

Sunday
Mostly cloudy. 1 to 15 cm of snow. 70 km/h west ridgetop wind. Treeline temperature -6 °C.

Monday
Mostly cloudy. 5 to 15 cm of snow. 60 km/h southwest ridgetop wind. Treeline temperature -4 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Use conservative route selection. Choose simple, low angle terrain with no overhead hazard.
  • Stay off recently wind loaded slopes until they have had a chance to stabilize.
  • Be aware of the potential for large avalanches due to buried weak layers.
  • Remote triggering is a concern; avoid terrain where triggering overhead slopes is possible.

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.