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Avalanche Forecast

Archived

Dec 22nd, 2022–Dec 23rd, 2022

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

Regions

South Coast, North Shore, Sasquatch, Sasquatch, Sky Pilot.

An incoming storm will deliver significant precipitation burying a weak, unconsolidated layer created during the prolonged cold weather.

Confidence

High

Avalanche Summary

No notable recent avalanches have been reported. Expect avalanche activity to start with new snow, wind, and warming temperatures starting Friday.

Please continue to post your observations and photos to the Mountain Information Network.

Snowpack Summary

Around 5 to 15 cm of snow on Friday will arrive with warm temperatures and strong winds. Buried by the new snow is a layer of weak, sugary, unconsolidated snow produced by the recent cold weather.

The mid and lower snowpack is generally well settled and bonding.

At treeline, the snowpack depth generally is 100 to 180 cm.

Weather Summary

Thursday night

Cloudy with snow, up to 10 cm in the North Shore mountains, less as you move inland. Light to moderate southwest winds and -5 to -10 C in the alpine.

Friday

Cloudy with snow, 5 to 15 cm. Temperatures of 0 to -5 C, and moderate to strong southwest winds.

Saturday

Cloudy with heavy rain or wet snow (roughly 50 mm). Temperatures above freezing, and strong southwest winds in the alpine. Freezing levels rise to 2000 m.

Sunday

Cloudy with rain or wet snow (roughly 20 mm). Temperatures above freezing, and moderate to strong southwest winds in the alpine. Freezing levels around 1500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for changing conditions today, storm slabs may become increasingly reactive.
  • Minimize exposure during periods of heavy loading from new snow, wind or rain.

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.