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Avalanche Forecast

Archived

Dec 13th, 2025–Dec 14th, 2025

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

Regions

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

Buried weak layers will likely cause dangerous avalanche conditions to persist.

Ensure your route planning accounts for overhead hazard and avoids travelling under large slopes.

Confidence

Moderate

Avalanche Summary

The avalanche cycle continued on through the past week, with many large to very large (size 2-3) storm and persistent slab avalanches. These avalanches, were noted to be failing deep within the snowpack, either below the storm snow or on the crust from November.

The larger avalanches (size 3-3.5) were running from the alpine into the valley bottoms, well below treeline.

Snowpack Summary

50 to 120 cm of snow has fallen over the past week and has rapidly settled . This new snow overlies a weak surface hoar layer and/or weak faceted snow.

Surface hoar is most likely to be located in tree openings sheltered from the wind, whereas faceted snow may be found in wind-exposed terrain into the alpine.

A hard melt freeze crust formed in mid November, can be found down 120 to 150 cm. Expect to find faceted snow crystals that are associated with this crust. This layer has recently produced large avalanches due to ongoing snowfall and increased loading.

Weather Summary

Saturday Night
Mostly cloudy. 2 to 5 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1600 m.

Sunday
Cloudy. 5 to 10 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1700 m.

Monday
Cloudy. 15 to 35 mm of precipitation as snow or rain at treeline. 50 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 2000 m.

Tuesday
Mostly cloudy. 10 to 25 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1400 m.



More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Use conservative route selection. Choose simple, low angle terrain with no overhead hazard.
  • Be aware of the potential for large, destructive avalanches due to deeply buried weak layers.
  • Remote triggering is a concern; avoid terrain where triggering overhead slopes is possible.

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.