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Avalanche Forecast

Archived

Jan 30th, 2025–Jan 31st, 2025

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

Kootenay Boundary, Bonnington, Grohman, Kootenay Pass, Norns, Rossland, Ymir.

Up to 30 cm of new snow may be seen by Friday afternoon. Travel in avalanche terrain is not recommended.

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Confidence

Moderate

Avalanche Summary

No new avalanches were reported on Wednesday.

Natural and human-triggered avalanches are likely on Friday and through the weekend.

Snowpack Summary

15 to 30 cm of snow is forecast by Friday afternoon. The new snow will likely have a poor bond to the old snow surfaces. These consist of a thick melt-freeze crust on sun-exposed slopes, large surface hoar and/or facets on shaded slopes, and wind-affected surfaces in exposed terrain.

The upper snowpack may contain one or more layers of surface hoar buried sometime in January. These layers are not currently a problem but may wake up with the upcoming storm loading.

The mid and lower snowpack remains generally well-settled and strong, with no current concerns or significant instability noted.

Weather Summary

Thursday Night

Cloudy with snow 5 to 10 cm. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Friday

Cloudy with snow 10 to 25 cm with enhanced amounts near Kootenay Pass. 15 gusting to 45 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Saturday

New snow 5 to 10 cm. 15 gusting to 70 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Sunday

Cloudy with flurries. 20 km/h southwest ridgetop wind. Treeline temperature -10 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid avalanche terrain during periods of heavy snowfall.
  • Avalanche danger is expected to increase throughout the day.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.

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.