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Avalanche Forecast

Archived

Mar 25th, 2026–Mar 26th, 2026

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

Northwest Coastal, Boundary, Ningunsaw.

Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.

Very large human-triggered avalanches are possible.

Confidence

Low

  • We are uncertain about alpine conditions due to limited field observations.
  • We are confident that there are persistent slabs in the snowpack, but uncertain about how likely they are to trigger.

Avalanche Summary

In the past few days, a few natural, cornice-triggered, and skier-triggered wind slabs up to size 2 were reported. A few natural cornice failures occurred, but did not pull slabs on the slopes below.

In the neighbouring region, a fatal avalanche accident occurred north of Terrace on March 22. Available details can be found here.

Observations in this region are limited, and there's uncertainty about buried weak layers in the mid snowpack. Choose conservative terrain.

Snowpack Summary

Cornices are large and looming. Avoid travelling underneath them.

last week's 20 to 50 cm of storm snow has been redistributed by strong southwest shifting to northeast winds, creating wind slabs on a variety of aspects. This sits on a variety of old surfaces, including surface hoar, facets, crusts, and/or wind-scoured snow.

There are multiple persistent weak layers consisting of crust/facets or surface hoar in the top 200 cm of the snowpack. We have limited information on the distribution and reactivity of these layers.

Weather Summary

Wednesday Night

Partly cloudy. 20 km/h southeast ridgetop wind. Treeline temperature -16 °C.

Thursday

Mix of sun and clouds. 1 to 3 cm of snow. 30 km/h southeast ridgetop wind. Treeline temperature -16 °C.

Friday

Mix of sun and clouds. 2 to 5 cm of snow. 30 km/h southeast ridgetop wind. Treeline temperature -12 °C.

Saturday

Mix of sun and clouds. 3 to 5 cm of snow. 20 km/h southeast ridgetop wind. Treeline temperature -11 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Stay off recently wind loaded slopes until they have had a chance to stabilize.
  • Cornice failures could trigger large and destructive avalanches.
  • Be aware of the potential for large avalanches due to buried weak layers.

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.

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.

Cornices

Cornice Fall is the release of an overhanging mass of snow that forms as the wind moves snow over a sharp terrain feature, such as a ridge, and deposits snow on the downwind (leeward) side. Cornices range in size from small wind drifts of soft snow to large overhangs of hard snow that are 30 feet (10 meters) or taller. They can break off the terrain suddenly and pull back onto the ridge top and catch people by surprise even on the flat ground above the slope. Even small cornices can have enough mass to be destructive and deadly. Cornice Fall can entrain loose surface snow or trigger slab avalanches.