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Avalanche Forecast

Archived

Feb 27th, 2024–Feb 28th, 2024

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

Regions

South Coast, North Shore, Sasquatch, Sasquatch, Tetrahedron.

Very dangerous avalanche conditions exist at higher elevations. Avoid all avalanche terrain.

Natural avalanche activity is expected with heavy snowfall and strong winds.

Confidence

High

Avalanche Summary

No recent avalanches have been reported in the region.

Widespread natural avalanche activity is expected to begin on Wednesday as snow and wind develop sensitive storm slabs.

Snowpack Summary

New snow accumulates over a crust at lower elevations and wind-affected surfaces in the alpine and exposed treeline.

The mid and lower snowpack are generally well consolidated, and likely still moist from the recent rain. Conditions remain rugged at lower elevations, with a shallow snowpack.

Weather Summary

Tuesday Night

Cloudy with snow switching to rain, accumulation 15 to 25 cm above the rain-snow line. Freezing level rises from 500 m to 1000 m. 40 to 60 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Wednesday

Cloudy with 30 to 40 cm above the rain-snow line. Freezing level rises from 1000 m to 1500 m. 60 to 80 km/h southwest ridgetop wind. Treeline temperature -2 °C. 

Thursday

Cloudy with 1 to 5 cm of snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -7 °C. Freezing level hovers around 700 m.

Friday

Cloudy with 20 to 30 cm of snow. 40 to 60 km/h south ridgetop wind. Treeline temperature -7 °C. Freezing level hovers around 700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid all avalanche terrain during periods of heavy snowfall.
  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Closely monitor how the new snow is bonding to the old surface.

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.