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Archived

Avalanche Forecast

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

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

Snow that is being redistributed by the wind will be likely to avalanche.

Deeply buried layers are still a concern in very large alpine terrain.

Confidence

Moderate

Avalanche Summary

One very large natural avalanche was observed on Wednesday (size 3.5) on a northerly aspect at 1800 m. This likely failed on the buried weak layer from December described in the snowpack summary.

Ongoing sluffing of the new snow and small wind slabs (less than size 2) in steep areas are being observed throughout the region.

Snowpack Summary

There has been 20 to 40 cm of new snow since Wednesday. This new snow fell on a mix of:

  • Large surface hoar crystals in sheltered spots at treeline and below

  • Crusts on solar slopes

  • Old wind-affected snow

These types of snow may result in a weak layer moving forward.

Strong northeast winds will now reverse load features at all elevations.

A layer of surface hoar from early January is buried 20 to 60 cm deep, though it's uncertain whether this layer will persist.

100 to 200 cm deep in the snowpack are layers of crust, facets, and possibly surface hoar that were buried in December.

Weather Summary

Saturday Night

Mix of sun and cloud with flurries. 20 to 50 km/h east ridgetop wind. Treeline temperature -16 °C.

Sunday

Sunny. 40 to 70 km/h northeast ridgetop wind. Treeline temperature -16 °C.

Monday

Sunny. 50 to 70 km/h northeast ridgetop wind. Treeline temperature -16 °C.

Tuesday

Sunny. 50 to 70 km/h southwest ridgetop wind. Treeline temperature -12 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully manage your exposure to overhead hazards.
  • Avoid freshly wind-loaded terrain features.

Avalanche Problems

Wind Slabs

Strong northeast wind has reverse or cross-loaded slopes at all elevations. The recent 20 to 40 cm of snow may bond slowly to underlying layers.

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

Elevations: All elevations.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2.5

Persistent Slabs

The 100 to 200 cm deep weak layer from early December continues to produce large avalanches.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 2.5 - 4