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Archived

Avalanche Forecast

Apr 18th, 2025–Apr 19th, 2025
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Babine, Hudson Bay, Microwave-Sinclair, North Bulkley, South Bulkley, Telkwa.

Lingering concern remains for buried weak layers in the snowpack. A cautious approach is recommended during times of uncertainty.

Confidence

Low

Avalanche Summary

On Thursday, a skier triggered a size 2 wind slab on a NE aspect at 2350 m, which was 10-20 cm thick. Natural wet loose avalanches up to size 2.5 and natural cornice releases were also observed.

On Wednesday, a natural cornice fall triggered a size 2.5 wind slab in the west of the region. This occurred on a NW aspect at 2300 m, and the slab was 100 cm thick.

Snowpack Summary

A widespread surface crust is expected to have formed following Thursday's warming event.

Two layers currently exist in the mid-snowpack and remain an isolated concern:

  • A layer of surface hoar that formed in early March can be found at a depth of 40 to 70 cm.

  • A layer of facets, surface hoar, and/or a crust from mid-February is buried 60 to 120 cm deep.

Weather Summary

Friday Night

Cloudy with snowfall up to 3 cm. 30 to 40 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level valley bottom.

Saturday

Cloudy with snowfall up to 6 cm. 20-30 km/h northwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1100 m.

Sunday

A mix of sun and cloud with lingering flurries in the morning. 10 to 20 km/h northwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1400 m.

Monday

Mostly sunny. 10 to 20 km/h northwest ridgetop wind. Treeline temperature +1 °C. Freezing level 1600 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • 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.
  • If you are increasing your exposure to avalanche terrain, do it gradually as you gather information.

Avalanche Problems

Persistent Slabs

Uncertainty remains about the reactivity of weak layers in the snowpack, and they continue to produce concerning, but isolated, results in snowpack tests. It's worth remaining cautious until we gain more confidence in these layers.

Aspects: North, North East, East, North West.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3

Cornices

Use extra caution around cornices. A cornice fall would be the most likely trigger for a persistent slab avalanche.

Aspects: North, North East, East, South East, North West.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1.5 - 2.5