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Archived

Avalanche Forecast

Apr 11th, 2025–Apr 12th, 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
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

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

Before venturing into challenging and complex terrain, give new storm snow time to settle and bond.

If new snowfall accumulations exceed 20 cm bump your danger rating to CONSIDERABLE.

Confidence

Moderate

Avalanche Summary

We have had no new avalanche reports in the past 24 hrs.

If you do head out in the mountains, please share your observations on the Mountain Information Network.

Snowpack Summary

Up to 35 cm of new snow is present on the surface above 1500 m. A melt-freeze crust is on or near the surface up to 1800 m. Dry snow persists on northerly aspects at upper elevations.

Below 1100 m the snowpack is wet and unconsolidated.

Three persistent weak layers remain notable in the snowpack.

  • Surface hoar that formed in mid-March can be found 50 to 100 cm below the snow surface.

  • A layer of surface hoar that formed in early March can be found at a depth of 100 to 150 cm.

  • A layer of facets, surface hoar, and/or a crust from mid-February is buried 100 to 200 cm deep.

At elevations below treeline, the snow pack is rain saturated and isothermal.

Weather Summary

Friday Night

Mostly cloudy with 1 to 5 cm of snow. 20 to 40 km/h west ridgetop wind. Treeline temperature -2 °C. Freezing level 800 m.

Saturday

Mostly cloudy with flurries. 10 to 30 km/h west ridgetop wind. Treeline temperature -1°C. Freezing level 1000 m.

Sunday

Cloudy with up to 10 cm snow. 50 to 60 km/h southwest ridgetop wind. Treeline temperature -1°C. Freezing level 1100 m.

Monday

Cloudy with up to 10 cm snow. 30 to 40 km/h southwest ridgetop wind. Treeline temperature -1°C. Freezing level 1100 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • 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.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.

Avalanche Problems

Storm Slabs

Expect wind slab development on north aspect terrain, near and below ridge crests.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1.5 - 2.5

Persistent Slabs

Weak layers of surface hoar and facets in the upper snowpack have recently produced large avalanches. Surface instabilities or large triggers may step down to these deeper layers.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 2 - 3.5