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Archived

Avalanche Forecast

Mar 11th, 2025–Mar 12th, 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
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: East Island, North Island, South Island, Vancouver Island, West Island.

15 to 30 cm of new snow and strong southwest wind will build touchy storm slabs. Avoid lee slopes at ridgeline.

Stick with a conservative trip plan and watch for signs of instability.

Confidence

Moderate

Avalanche Summary

No recent reports by Tuesday afternoon.

On Monday, explosive control produced one storm slab (size 1.5), and the AvCan field team observed one size 2 storm slab that they suspect was remotely triggered by a snowmobile.

New snow and strong to extreme southwest wind may form touchy storm and wind slabs on Wednesday.

Snowpack Summary

New snow accompanied by strong to extreme southwest wind will likely form fresh wind slabs at upper elevations on Wednesday.

This brings 80 to 120 cm (deeper totals in leeward terrain) of recent storm snow, which sits above a crust and a mix of facets and surface hoar that formed earlier this month. The mid and lower snowpack is strong and dense with depths of near 400 cm at treeline elevations.

Weather Summary

Tuesday Night

Cloudy with 10 to 25 cm of snow with higher amount on the west side of the island. 60 to 80 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 500 m.

Wednesday

Cloudy with up to 5 to 10 cm of snow. 20 to 40 km/h southeast ridgetop wind. Treeline temperature -2 °C. Freezing level 800 m.

Thursday

Mix of sun and cloud. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 900 m.

Friday

Cloudy with 5 to 10 cm of snow. 10 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid freshly wind-loaded terrain features.
  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
  • Seek out sheltered terrain where new snow hasn't been affected by wind.

Avalanche Problems

Storm Slabs

Touchy storm slabs are likely on Wednesday. Back off if you encounter signs of instability like whumpfing, shooting cracks or recent avalanches.

Dry loose sluffing is likely in steep terrain features.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2