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Avalanche Forecast

Archived

Mar 10th, 2025–Mar 11th, 2025

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

South Coast, Powell River, North Shore, Sasquatch, Sasquatch, Sky Pilot, Tetrahedron, Harrison-Fraser.

Touchy storm slabs are likely on Tuesday.

Careful snowpack evaluation, cautious route-finding, and conservative decision-making are essential.

Confidence

Moderate

Avalanche Summary

On Sunday, numerous natural, size 1, wet loose avalanches were observed below treeline.

With forecasted new snow and wind, storm slabs will likely be reactive on Tuesday.

If you are headed to the backcountry, please consider sharing your photos and observations from your day on the Mountain Information Network.

Snowpack Summary

20 to 40 cm of new snow is expected by Tuesday afternoon, forming touchy storm slabs. This could bring storm snow totals in the alpine near 100 cm since the weekend. High north-facing slopes may see deeper deposits of wind-transported snow.

At treeline and below, the new snow will sit above a crust on all aspects. This crust has approximately 30 cm of dense, saturated storm snow below, with the upper snowpack generally seeing moist throughout.

The mid and lower snowpack contain several crusts that are not concerning.

Check out this great MIN with snowpack observations from the Mount Seymour area.

Weather Summary

Monday Night

Cloudy with 5 to 10 cm. 25 to 40 km/h south ridgetop wind. Treeline temperature -3 °C. Freezing level 600 m.

Tuesday

Cloudy with 20 cm of snow. 20 to 45 km/h south ridgetop wind. Treeline temperature -2°C. Freezing level 800 m.

Wednesday

Cloudy with 20 to 30 cm of snow. 20 gusting to 65 km/h south ridgetop wind. Treeline temperature -5 °C. Freezing level around 800 m.

Thursday

Mix of sun and cloud. 10 to 20 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

  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Avoid freshly wind-loaded terrain features.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.