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Archived

Avalanche Forecast

Jan 29th, 2025–Jan 30th, 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
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: Boundary, East Stikine, Kispiox, Ningunsaw, Northwest Coastal, Northwest Inland, Stewart, West Stikine.

Conditions will remain dangerous after the storm. The new snow needs time to strengthen.

Confidence

Moderate

Avalanche Summary

Wednesday's storm likely caused a natural avalanche cycle, with preliminary reports finding storm slabs were reactive to explosives.

During the warm weather on Sunday, a few large to very large (size 2 to 3) persistent slab avalanches occurred on southeast and northeast aspects. We are uncertain how these slabs responded to the latest storm.

Snowpack Summary

30 to 50 cm of snow fell on Wednesday, with southwest wind depositing more in lee areas. A layer of surface hoar is buried 50 to 90 cm deep, observed on all aspects and elevations. Buried weak layers from December, 150 to 250 cm deep, include crusts, facets, and/or surface hoar, and continue to produce large avalanches.

Weather Summary

Wednesday Night

Clearing skies with 2 to 4 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -12 °C.

Thursday

Mix of sun and cloud. 20 km/h southeast ridgetop wind. Treeline temperature -15 °C.

Friday

Mostly cloudy with 1 to 3 cm of snow. 20 km/h northeast ridgetop wind. Treeline temperature -15 °C.

Saturday

Mix of sun and cloud. 30 km/h northeast ridgetop wind. Treeline temperature -20 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Use conservative route selection. Choose simple, low angle terrain with no overhead hazard.
  • Fresh snow rests on a problematic persistent slab, don't let good riding lure you into complacency.

Avalanche Problems

Storm Slabs

30 to 50 cm of new snow from Wednesday has formed reactive slabs, especially on wind-loaded slopes.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2.5

Persistent Slabs

The weak layer from early December is of greatest concern in areas with shallow, thin-to-thick snowpacks and on wind-loaded north and east-facing slopes.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 2 - 4