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Avalanche Forecast

Archived

Mar 27th, 2025–Mar 28th, 2025

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

Regions

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

Reactive storm slabs are building at treeline and above.

Avoid avalanche terrain during periods of rapid loading from new snow or rain.

Confidence

Moderate

Avalanche Summary

Reports have been very limited during the stormy period. Several wet loose avalanches have been reported acorss the region generally in the small (size 1-1.5) range.

We expect with further heavy snowfall accumulating overnight and through Friday at upper elevations, that storm slabs will be reactive.

Snowpack Summary

Recent rain and warming to mountaintop has saturated the upper snowpack and will likely form a crust as freezing levels drop and new snow falls overtop. 40 to 70 cm of new snow is expected overnight and through Friday, with the highest precipitation forecast for the central region. (The hazard may only be considerable in areas that receive accumulations of 40 cm or less). These conditions will build reactive new storm slabs at upper elevations. Expect deeper and more reactive deposits on northerly slopes due to forecast strong southerly wind. Lower elevations will have a moist or wet snowpack.

Weather Summary

Thursday Night

Cloudy, with 10 to 20 cm of snow above 1500 m, potential rain below. Highest amounts for the North Shore. 35 to 50 km/h southeast ridgetop winds. Treeline temperature 0 °C. Freezing level around 1500 m.

Friday

Cloudy with 30 to 50 cm of snow above 1000 m, potential rain below. Highest amounts for the North Shore. 40 to 50 km/h south ridgetop winds. Treeline temperature -1 °C. Freezing level rising to 1400 m.

Saturday

Cloudy with 10 to 25 cm of snow above 1200 m, potential rain below. 35 km/h southwest ridgetop winds. Treeline temperature -2 °C. Freezing level rising to 1300 m.

Sunday

Sunny. 25 to 30 km/h southeast ridgetop winds. Treeline temperature +2 °C. Freezing level rising to 1800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid avalanche terrain during periods of heavy loading from new snow, wind, or rain.
  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Keep in mind that the high density of wet avalanches can make them destructive.
  • Use conservative route selection. Choose simple, low angle terrain with no overhead hazard.

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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.