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Archived

Avalanche Forecast

Mar 3rd, 2025–Mar 4th, 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
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.

Conservative terrain selection is critical right now.

Choosing low-consequence terrain is the best way to avoid avalanches.

Confidence

Moderate

Avalanche Summary

On Sunday There were several avalanches up to size 3 reported throughout the region.

Snowpack Summary

Wind-transported snow has likely built deeper slabs on northerly aspects at upper elevations. South-facing slopes have formed a crust and lower-elevation snow may be crusty as freezing levels fall.

The upper metre of the snowpack is complicated. This snow sits above several significant weak layers that formed during the January and February dry spells. These include facets, surface hoar (in sheltered terrain), and crust on solar aspects.

A layer of facets on top of a crust from early December is buried 100 to 200 cm deep. This layer is generally not a concern in this region.

Weather Summary

Monday Night

Partly cloudy. 10 to 20 km/h north ridgetop wind. Treeline temperature -4 °C. Freezing level 900 m.

Tuesday

Mostly cloudy. 20 to 30 km/h east ridgetop wind. Treeline temperature -3 °C. Freezing level 900 m.

Wednesday

Mostly sunny. 10 to 20 km/h east ridgetop wind. Treeline temperatures +2. Freezing level 1300 m.

Thursday

Mostly cloudy with sunny breaks. 20 to 40 km/h south ridgetop wind. Treeline temperatures +2. Freezing level 1300 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep your guard up as storm slabs may remain sensitive to human triggering.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.
  • Stick to simple terrain or small features with limited consequence.
  • Avoid steep, sun-exposed slopes when the air temperature is warm or when solar radiation is strong.

Avalanche Problems

Storm Slabs

Storm slabs sit on a weak interface and are expected to be sensitive to human triggering. Deeper deposits of wind-transported snow may exist in leeward and cross-loaded terrain, especially near ridge crests and rollovers.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5

Persistent Slabs

Two surface hoar layers can be found in the top meter of the snowpack in sheltered terrain. Recent snowfall, wind, sun, and warming will add stress to these layers, and they may become reactive.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1.5 - 3