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Avalanche Forecast

Archived

Apr 6th, 2026–Apr 7th, 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 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 Coastal, Northwest Inland, Boundary, Kitimat, Nass, Rupert, Seven Sisters, Shames, Stewart, Howson, Kispiox, Ningunsaw.

Storm slab releases are more likely at upper elevations in exposed terrain where wind has supported slab development.

Continually assess as you travel, and stick to conservative terrain.

Confidence

Moderate

  • We are uncertain about how quickly the snowpack will recover and gain strength.

Avalanche Summary

On Monday, a size 1 storm slab was reported north of Silvertip. It occured in a wind affected area and the depth was 20 cm.

We suspect similar activity occurred throughout the region and specifically the Kispiox Range where storm snow accumulated over 20 cm during the day Monday.

Numerous wet loose avalanches were reported on Monday during the rise in freezing levels.

Persistent slab activity has tapered in the last week, but the snowpack structure remains suspect.

Snowpack Summary

Recent storm snow has accumulated between 30 to 60 cm at upper elevations. Freezing levels have been fluctuating, moist and/or refrozen snow is expected at treeline and below. This new snow has been redistributed by moderate northwest wind creating more reactive storm slabs in lee features.

This further buries various previous surfaces: a sun crust on solar aspects, faceted snow in sheltered northerly aspects and surface hoar.

Below this, A layer of facets and/or surface hoar from earlier in March can be found 50 to 100 cm deep.

Several persistent weak layers are buried up to 250 cm deep. While triggering these layers is becoming unlikely, they present a low-probability, high-consequence problem.

Weather Summary

Monday Night
Mostly cloudy. 2 to 10 cm of snow. 40 km/h northwest ridgetop wind. Treeline temperature -5 °C.

Tuesday
Cloudy. 1 cm of snow. 20 km/h northwest ridgetop wind. Treeline temperature -4 °C.

Wednesday
Mix of sun and clouds. 1 to 2 cm of snow. 30 km/h northwest ridgetop wind. Treeline temperature -5 °C.

Thursday
Mostly sunny. 1 cm of snow. 20 km/h northwest ridgetop wind. Treeline temperature -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep your guard up as storm slabs may remain sensitive to human triggering.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Be aware of the potential for large, destructive avalanches due to deeply buried weak layers.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

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.