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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.
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

Coquihalla, Harrison-Fraser, Manning, Skagit.

Avalanche danger will increase as snow accumulates and freezing levels rise beginning Friday and into the weekend.

Confidence

Moderate

Avalanche Summary

No notable recent avalanches have been reported.

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

Snowpack Summary

10 to 20 cm of snow may have accumulated by Friday afternoon, accompanied by strong winds. The new snow generally overlies a facetted, weak, unconsolidated layer formed during the recent cold weather.

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

At treeline the snowpack depth is roughly 200 cm.

Weather Summary

Thursday night

Cloudy with light snow, about 5cm. Temperatures -10 to -20 C and mostly light south winds.

Friday

Cloudy with snow, about 10 cm. Temperatures of -5 to -15 C and moderate to strong southwest winds.

Saturday

Cloudy with snow and rain at lower elevations, 10 to 20 cm. Temperatures 0 to -5 C and strong southwest winds in the alpine. Freezing levels as high as 1500 m.

Sunday

Cloudy with light snow, about 5cm. Temperatures around 0 c and moderate southwest winds in the alpine. Freezing levels as high as 1500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Wind slabs are most reactive during their formation.
  • Watch for fresh storm slabs building throughout the day.

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.