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Archived

Avalanche Forecast

Mar 14th, 2025–Mar 15th, 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
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.

Natural persistent slab avalanche activity has tapered. However, a cautious approach is warranted as there is still potential for human-triggered persistent slabs.

Confidence

Moderate

Avalanche Summary

Reports from the last few days show several persistent slab avalanches up to size 1.5 in the alpine and treeline elevation bands. These were natural and skier-triggered. All were suspected of running on a recently buried surface hoar layer 30 to 40 cm deep.

Snowpack Summary

20-30 cm of recent new snow has been redistributed by primarily southerly winds. This new snow fell on a widespread layer of large surface hoar crystals, which may sit on a crust on solar aspects and at low elevations.

A layer of facets, surface hoar and/or a crust from mid-February are buried 50 to 100 cm deep. This layer produced large natural and human-triggered avalanches through the previous week.

The remainder of the snowpack is well consolidated with no concerns at this time.

Weather Summary

Friday Night

Mostly cloudy. 20 to 40 km/h east ridgetop wind. Treeline temperature -8 °C.

Saturday

Cloudy with 5 cm of snow. 30 to 60 km/h east ridgetop wind. Treeline temperature -8 °C.

Sunday

Mostly cloudy with isolated flurries. 15 to 30 km/h south and southeast ridgetop wind. Treeline temperature -3 °C.

Monday

Mostly cloudy with flurries. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -2 °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.
  • Be aware of the potential for large avalanches due to buried surface hoar.
  • Be mindful that deep instabilities are still present and have produced recent large avalanches.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

Avalanche Problems

Persistent Slabs

Two buried weak layers of facets and/or surface hoar that were buried mid February and early March have been recently reactive.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1.5 - 3

Wind Slabs

Recent new snow has been redistributed into alpine and treeline lee terrain. Wind slabs may be more reactive where sitting on a recently buried layer of surface hoar.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5