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Avalanche Forecast

Archived

Jan 30th, 2025–Jan 31st, 2025

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

Regions

Lizard-Flathead, South Rockies, Akamina, Flathead, Lizard, Crawford, Moyie, St. Mary, Bull, Crowsnest North, Crowsnest South, Elkford East, Elkford West.

An incoming storm is driving the avalanche danger. Reactive storm slabs will build throughout the day.

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Confidence

Moderate

Avalanche Summary

No new reports on Wednesday.

With new snow and strong wind forecast, natural and human-triggered avalanches are likely on Friday.

Snowpack Summary

Up to 20 cm of snow is forecast by Friday afternoon and will likely have a poor bond to the old snow surfaces. These consist of faceted snow, surface hoar in shaded wind-sheltered areas and a hard melt-freeze crust found on the snow surface on sunny slopes. At high elevations, the new snow buries the widespread wind effect found in wind-exposed terrain.

The mid and lower snowpack is strong.

Weather Summary

Thursday Night

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

Friday

Cloudy with snow 5 to 10 cm. 15 gusting to 45 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1100 m.

Saturday

New snow 5 to 10 cm. 15 gusting to 80 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

  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Be aware of the potential for loose avalanches in steep terrain where snow hasn't formed a slab.

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.