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Avalanche Forecast

Archived

Apr 5th, 2025–Apr 6th, 2025

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

Forecast snow and wind will form fresh storm slabs most reactive to human triggers in wind affected terrain at upper elevations.

Avalanche danger is expected to increase throughout the day.

Confidence

Moderate

Avalanche Summary

On Friday, no new avalanches were reported.

Forecast snow and wind are expected to form reactive storm slabs at upper elevations on Sunday.

Snowpack Summary

Forecast 25 to 35 cm of snow (above 1700 m) on Sunday will form storm slabs sitting on a moist snow surface. The storm slabs are expected to be most reactive in wind affected terrain at upper elevations.

The snowpack is strong and bonded, but melting quickly at lower elevations.

Weather Summary

Saturday Night

Cloudy with flurries, 0 to 10 mm rain. 20 to 30 km/h south ridgetop wind. Treeline temperature 4 °C. Freezing level 2500 m.

Sunday

25 to 35 cm snow above 1700 m, rain below. Another 25 to 35 cm snow overnight. 30 to 40 km/h south ridgetop wind. Treeline temperature 3 °C. Freezing level 2000 m. and lowering throughout the day.

Monday

Cloudy with flurries, 10 to 15 cm of snow above 1000 m. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1300 m.

Tuesday

Mix of sun and cloud with isolated flurries, 0 to 10 cm snow. 20 to 30 km/h south ridgetop wind. Treeline temperature -1 °C. Freezing level 1400 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avalanche danger is expected to to increase throughout the day, think carefully about your exit plan from the backcountry.
  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Make conservative terrain choices and avoid overhead hazard.
  • Use small, low consequence slopes to test the bond of the new snow.

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.