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Avalanche Forecast

Archived

Mar 9th, 2025–Mar 10th, 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 avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
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 unlikely, human triggered possible.

Regions

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

Closely monitor how the new snow is bonding to the old surface. Human-triggered avalanches remain likely.

Confidence

High

Avalanche Summary

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

On Saturday, explosive control produced several storm slab avalanches, size 1 to 1.5, at treeline and below treeline. A few human-triggered storm snow avalanches, up to size 1, were also reported on below treeline features.

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

Snowpack Summary

Up to 70 cm of storm snow blankets the region. Moderate southwest winds have redistributed storm snow into deep pockets on lee slopes at the ridgeline. Storm snow covers a thick a crust except on high north facing terrain, where new snow buries up to 20 cm of dense snow overlying a crust from earlier in March. Below this crust is a generally moist upper snowpack.

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

Sunday Night

Cloudy with heavy flurries, 2 to 5 cm of snow. 20 to 30 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level drops to 700 m.

Monday

Partly cloudy with light flurries, 1 to 2 cm snow. 15 to 25 km/h southwest ridgetop wind. Treeline temperature -6 °C. Freezing level around 800 m.

Flurries intensify overnight, 5 to 15 cm of snow.

Tuesday

Cloudy with flurries, 5 to 15 cm of snow. 20 to 30 km/h southeast ridgetop wind. Treeline temperature -6 °C. Freezing level 800 m.

Wednesday

Cloudy with flurries, 10 to 30 cm of snow. 50 to 70 km/h south ridgetop wind. Treeline temperature -4 °C. Freezing level 1200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Avoid freshly wind-loaded terrain features.
  • Be aware of the potential for human triggerable storm slabs at lower elevations, even on small features.
  • The best and safest riding will be on slopes that have soft snow without any slab properties.

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.