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Archived

Avalanche Forecast

Feb 4th, 2025–Feb 5th, 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
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
1: Low
The avalanche danger rating below treeline will be low

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

It could be challenging to find riding that is both low risk and fun…

The persistent slab problem is concerning in sheltered terrain and exposed terrain is scoured or has wind slab present

Confidence

Moderate

Avalanche Summary

Over the past 3 days numerous rider triggered wind and persistent slab avalanches have been reported. These avalanches have generally been size 1’s at treeline. They have occurred on a variety of aspects.

The persistent slab avalanches were triggered on the surface hoar layer from mid January that is described in the snowpack summary.

Snowpack Summary

Strong to extreme northeast outflow wind continues to scour windward terrain at all elevations. In sheltered terrain 20 to 40 cm of snow overlies a surface hoar layer from late January.

Another layer of surface hoar was buried near the middle of January and can be found 50 cm deep.

100 to 200 cm deep in the snowpack are layers of crust, facets, and possibly surface hoar that were buried in December and have not been recently reactive in this forecast area.

Weather Summary

Tuesday Night

Clear skies. 40 to 70 km/h northeast ridgetop wind. Treeline temperature -14 °C.

Wednesday

Sunny. 20 to 40 km/h northeast ridgetop wind. Treeline temperature -8 °C.

Thursday

Mostly sunny in the morning and increasing cloud throughout the day. 10 to 20 km/h east ridgetop wind. Treeline temperature -12 °C.

Friday

Mix of sun and cloud with trace amounts of snow in the early morning. 10 to 20 km/h north ridgetop wind. Treeline temperature -10 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid freshly wind-loaded terrain features.
  • Approach steep and open slopes at and below treeline cautiously, as buried surface hoar may exist.
  • Be aware of the potential for large avalanches due to buried surface hoar.

Avalanche Problems

Wind Slabs

Strong outflow (northeast) wind may continue to build wind slabs on south and west aspects.

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

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Persistent Slabs

On terrain features that have been protected from the wind, you are likely to find surface hoar . This layer is down 50 cm and has been reactive to rider traffic.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2