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Archived

Avalanche Forecast

Apr 14th, 2025–Apr 15th, 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
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
4: High
The avalanche danger rating below treeline will be high

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

Riders may still trigger wind slabs.

Keep in mind, buried weak layers could result in large avalanches.

Confidence

Moderate

Avalanche Summary

On Saturday, there was one large (size 2) natural wind slab in the alpine from a southeast aspect in the sun. As well as several wet loose avalanches on Sunday size 1-2).

On Friday, north of the Sleeping Beauty Provincial Park. Ski cutting produced a few small (size 1) wind slab avalanches with one large (size 2) remotely triggered persistent slab avalanche.

Snowpack Summary

Up to 35 cm of new snow is possible above 1500 m and has buried a melt freeze crust. At low elevations, It's likely a crust will form Monday night as the sky clears and temperatures drop.

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

Monday Night

Partly cloudy with 1 or 2 cm of snow. 30 to 50 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level 900 m.

Tuesday

Mostly cloudy. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -4 °C. Freezing level 900 m.

Wednesday

Mostly sunny. 15 km/h north ridgetop wind. Treeline temperature -1°C. Freezing level 1700 m.

Thursday

Mostly sunny. 10 km/h variable direction ridgetop wind. Treeline temperature +10 °C. Freezing level 3200 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 Problems

Persistent Slabs

Weak layers of surface hoar and facets in the upper snowpack have recently produced large avalanches. Avalanches in motion or cornice fall may step down to these layers.

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 2 - 3.5

Wind Slabs

Approach wind loaded terrain with caution. Test small, low consequence slopes before committing to bigger terrain.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Loose Wet

Wet loose may be a problem in areas that don't have a crust.

Aspects: All aspects.

Elevations: Below Treeline.

Likelihood: Possible

Expected Size: 1 - 2