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Archived

Avalanche Forecast

Jan 26th, 2025–Jan 27th, 2025
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
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
1: Low
The avalanche danger rating at treeline will be low
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
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

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

It's uncertain if warm weather will cause weak layers in the snowpack to become reactive.

Take a conservative approach until conditions are clear.

Confidence

Low

Avalanche Summary

Saturday: Two large (size 2) cornices failed on northwest facing slopes north of Terrace.

Friday: A few small storm slabs were rider-triggered near Shames on a south aspect at treeline.

Snowpack Summary

15 to 30 of settling snow from earlier this week sits on either old wind-affected layers or possibly surface hoar in sheltered spots. In exposed areas, soft snow has been redistributed into wind slabs.

100 to 200 cm deep in the snowpack are layers of crust, facets, and possibly surface hoar that were buried in December. Warm temperatures are expected to increase the reactivity of this layer.

The lower snowpack is generally well-settled and unconcerning.

Weather Summary

Sunday Night

Clear skies. 20 to 40 km/h northwest ridgetop wind. Treeline temperature -4 °C.

Monday

A mix of sun and clouds. 20 to 40 km/h west ridgetop wind. Treeline temperature -1 °C with a temperature inversion.

Tuesday

Cloudy with 5 to 10 cm of snow. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -3 °C inversion ends.

Wednesday

Cloudy with 10 to 20 cm of snow overnight and 5 to 10 cm during the day. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be especially cautious as you transition into wind-affected terrain.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.
  • Be aware of the potential for large avalanches due to buried surface hoar.
  • Avoid travelling on slopes below cornices.

Avalanche Problems

Persistent Slabs

A widespread crust with surface hoar and/or facets, buried in early December is buried 100 to 200 cm deep. The same layer has been responsible for several large, destructive avalanches in regions to the north.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 2 - 3

Wind Slabs

Expect to find stiffer and deeper deposits of snow in wind-loaded areas.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Cornices

Cornices can fail naturally during periods of warm weather.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 2 - 2.5