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Avalanche Forecast

Archived

Dec 8th, 2025–Dec 9th, 2025

Alpine
Natural and human triggered avalanches likely.
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 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

North Columbia, South Columbia, Esplanade, Jordan, North Selkirk, West Purcell, Badshot-Battle, Central Selkirk, Goat, Gold, Retallack, Valhalla, Whatshan.

Sunny skies may be inviting, but remember that the snowpack needs time to strengthen after the substantial load applied to it. Human-triggered avalanches are expected.

Confidence

Moderate

Avalanche Summary

Many storm and wind slabs were triggered naturally, by riders, and by explosives on the weekend. They ranged from 20 to 80 cm deep, with the deeper avalanches likely failing on the weak layers described in the Snowpack Summary.

Looking forward, human-triggered avalanches remain very likely on Tuesday as the snowpack remains stressed from all the recent snow load.

Snowpack Summary

Upwards of 80 cm of snow has accumulated since the start of the weekend, accompanied with strong southwest wind. A warming trend will increase slab properties.

All this snow is loading a weak surface hoar layer and/or weak faceted snow found 50 to 100 cm deep. Surface hoar is most likely in tree openings sheltered from the wind whereas faceted snow may be found in wind-exposed terrain into the alpine. Below this is a hard melt-freeze crust that formed mid-November.

Average treeline snow depths range from 90 to 140 cm, which tapers quickly at lower elevations.

Weather Summary

Monday Night

Cloudy. 15 to 30 cm of snow with local amounts up to 50 cm possible. 50 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1600 m.

Tuesday

Mix of sun and clouds. 30 km/h west ridgetop wind. Treeline temperature -4 °C. Freezing level 1500 m.

Wednesday

Cloudy. 15 to 30 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level rising to 1800 m.

Thursday

Mostly cloudy. 5 to 15 cm of snow. 30 km/h west ridgetop wind. Treeline temperature -3 °C. Freezing level 1500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Travel in alpine terrain is not recommended.
  • Remote triggering is a concern; avoid terrain where triggering overhead slopes is possible.
  • Give the new snow several days to settle and stabilize before pushing into bigger terrain.
  • Be cautious of buried obstacles, especially below treeline.

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.