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Archived

Avalanche Forecast

Apr 2nd, 2025–Apr 3rd, 2025
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
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
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Howson, Kitimat, Nass, Rupert, Seven Sisters, Shames.

Stay alert to changing conditions with elevation, aspect and time of day due to melt-freeze cycles. Loose wet avalanches or cornice falls may step down to trigger large persistent slabs.

Confidence

Moderate

Avalanche Summary

On Monday, a few wet loose avalanches were seen from steep terrain features. Where a thick, supportive surface crust is found, we expect that triggering avalanches on buried weak layers is unlikely.

Evidence from last week's natural avalanche cycle continued to be reported with very large slab avalanches (to size 4) failing on buried persistent weak layers.

Snowpack Summary

A melt-freeze crust has formed on most surfaces. Dry snow persists on northerly aspects at upper elevations.

Three persistent weak layers remain notable in the snowpack and have been responsible for recent large avalanches. Surface hoar that formed in mid-March can be found 50 to 100 cm below the snow surface. Below this, another layer of surface hoar that formed in early March can be found at a depth of 100 to 150 cm. Additionally, a layer of facets, surface hoar, and/or a crust from mid-February is buried 100 to 200 cm deep.

Weather Summary

Wednesday Night

Mainly clear. 20 to 30 km/h north ridgetop wind. Treeline temperature -4 °C. Freezing level 800 m.

Thursday

Mix of sun and cloud. 10 to 20 km/h west ridgetop wind. Treeline temperature +1 °C. Freezing level 1700 m.

Friday

Mix of sun and cloud. 20 to 30 km/h southwest ridgetop wind. Treeline temperature +4 °C. Freezing level 2100 m.

Saturday

Mix of sun and cloud. 40 to 60 km/h south ridgetop wind. Treeline temperature +4 °C. Freezing level 2100 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • 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.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.

Avalanche Problems

Persistent Slabs

Surface hoar and facets in the upper snowpack have recently produced large avalanches. These layers are most likely to be reactive at upper elevations where no surface crust has formed.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3.5

Cornices

As temperatures rise, large cornice falls will become a concern. They can potentially trigger persistent slabs on the slopes below. Carefully manage your exposure to overhead hazards, during the warmest part of the day.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2.5