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Avalanche Forecast

Archived

Feb 1st, 2025–Feb 2nd, 2025

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

Regions

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

Storm slabs continue to accumulate over an unstable layer. Avoid avalanche terrain during periods of heavy loading from new snow.

Confidence

Moderate

Avalanche Summary

On Friday and Saturday, storm slab avalanches were reported size 1-2 on all aspects and elevations. They were triggered naturally, by skiers, vehicles and explosives. Some were triggered remotely or sympathetically. Slabs were up to 60 cm deep and ran on a crust or facet layer. Reactivity is expected to continue on Sunday.

Snowpack Summary

Another 10 to 20 cm is forecast to fall over the day Sunday, bringing storm totals to 50 to 70 cm since Thursday night. Near ridgetops, strong southwest wind has likely loaded recent snow into leeward terrain features. At lower elevations, the storm snow may contain a thin crust from a brief temperature spike on Friday.

The recent snow is not bonding well to the underlying layer which may exist as a hard crust or weak, faceted grains.

The mid and lower snowpack is well-settled and dense with no other layers of concern.

Check out the snowpack discussion starting at 1:57 in North Shore Rescue's Avalanche Conditions Report from Friday.

Weather Summary

Saturday night

Cloudy with 5 to 10 cm of snow. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -10 °C.

Sunday

Cloudy with 10 to 20 cm of snow. 20 to 30 km/h south ridgetop wind. Treeline temperatures -10 °C.

Monday

Cloudy with 5 to 10 cm of snow. 20 to 40 km/h southeast ridgetop wind. Treeline temperatures -11 °C.

Tuesday

A mix of sun and cloud. 20 to 40 km/h southeast ridgetop wind. Treeline temperatures -10 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Use increased caution at all elevations. Storm snow is forming touchy slabs.
  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Avoid avalanche terrain during periods of heavy snowfall.

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.