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Archived

Avalanche Forecast

Jan 28th, 2025–Jan 29th, 2025
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
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

Regions: Boundary, East Stikine, Kispiox, Ningunsaw, Northwest Coastal, Northwest Inland, Stewart, West Stikine.

Avoid all avalanche terrain.

A deeply buried weak layer may cause large avalanches to run to valley bottom.

Confidence

High

Avalanche Summary

On Monday, there were a few small (size 1) rider-triggered wind slab avalanches that failed on buried surface hoar.

On Sunday, there were a few large to very large (size 2 to 3) persistent slab avalanches that failed during the warm weather on southeast and northeast aspects.

Snowpack Summary

20 to 50 cm of snow is expected to fall by the end of the day Tuesday. This snow comes with southwest wind which will drop more snow into lee areas.

A layer of surface hoar is buried about 50 to 90 cm deep. This layer has been seen on all aspects at all elevations.

Around 130 to 250 cm deep are buried weak layers from December. Consisting of crusts, facets, and/or surface hoar. These layers continue to produce large avalanches.

The lower snowpack is strong, with no layers of concern.

Weather Summary

Tuesday Night

Cloudy with 20 to 35 cm of snow. 30 to 60 km/h southwest ridgetop wind. Treeline temperature -6 °C.

Wednesday

Cloudy with 5 to 10 cm of snow. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -7 °C.

Thursday

Clear skies. Calm wind. Treeline temperature -10 °C.

Friday

A mix of sun and cloud. 15 km/h northeast ridgetop wind. Treeline temperature -16 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid avalanche terrain during periods of heavy snowfall.
  • As the storm slab problem worsens, the easy solution is to choose more conservative terrain.
  • Very large and destructive avalanches could reach valley bottom.

Avalanche Problems

Storm Slabs

Heavy snowfall and wind will make dangerous avalanche conditions. Storm slabs may step-down to buried weak layers.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 1 - 3

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 or east-facing slopes.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 2 - 4