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Avalanche Forecast

Archived

Apr 13th, 2026–Apr 14th, 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

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

The possibility of a large persistent slab avalanche means continuing to avoid large, steep, open slopes.

These avalanches may be hard to trigger, but the consequences would be serious.

Confidence

Moderate

  • We are uncertain about how quickly persistent slabs are gaining strength.

Avalanche Summary

A few large (up to size 3) natural persistent slab avalanches occurred as recently as April 10. One size 3 may have been remotely triggered. These large avalanches have occurred on northwest through east-facing slopes in the alpine.

Snowpack Summary

Roughly 10 cm of new snow has buried a strong, supportive crust that is expected on the surface on all aspects at treeline and on all but north-facing terrain in the alpine.

Below treeline, a full overnight refreeze may not occur, resulting in a thin, weak, breakable crust. Wind-affected surfaces are likely in north-facing alpine terrain.

A layer of weak, sugary snow over a thick crust is buried 100 to 200 cm and continues to produce large, surprising avalanches.

Weather Summary

Monday Night

Mostly cloudy. 2 to 4 cm of snow. 30-50 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level falling to 700 m.

Tuesday

Mostly cloudy. 4 to 5 cm of snow. 15-30 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level rising to 1250 m.

Wednesday

Mix of sun and clouds. 2 to 3 cm of snow. 20 km/h north ridgetop wind. Treeline temperature -5 °C.

Thursday

Mix of sun and clouds. 20 km/h west ridgetop wind. Treeline temperature -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Be aware of the potential for large avalanches due to buried weak layers.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

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.