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Avalanche Forecast

Archived

Mar 15th, 2025–Mar 16th, 2025

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

Regions

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

Stormy conditions continue.

The avalanche danger will increase as new snow accumulates.

Dial back your terrain choices if you see signs of instability.

Confidence

Moderate

Avalanche Summary

On Friday, small loose dry avalanches (size 1) were easily triggered by skiers on steep slopes near Grouse Mountain. On Sky Pilot Mountain, skiers accidentally triggered storm slabs (size 1) avalanches on an easterly alpine feature.

If you are heading out into the backcountry, please consider submitting a Mountain Information Network report.

Snowpack Summary

An additional 10 to 20 cm is expected on Saturday night, bringing the storm total from the past week to 120 cm of recent storm snow, which is settling out rapidly. In localized areas, overnight unsettled conditions can bring up to 35 cm of new snow.

At upper elevations, strong winds have formed deeper deposits of wind-transported snow. At treeline and below, the new snow sits above a crust. The snow reportedly has a good bond to the underlying crust.

Below this, the snowpack is well-settled and strong.

Weather Summary

Saturday Night

Cloudy with 10 to 20 cm of new snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -4 C. Freezing level 800 m.

Sunday

Cloudy with 5 to 10 cm of new snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1000 m.

Monday

Cloudy with 10 to 15 cm of new snow. 30 to 40 km/h west ridgetop wind. Treeline temperature -2 °C. Freezing level rising to 1000 m.

Tuesday

Mix of sun and clouds. 15 to 30 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1000 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 loose avalanches in steep terrain where snow hasn't formed a slab.
  • Avoid terrain traps such as gullies and cliffs where the consequence of any avalanche could be serious.

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.