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Avalanche Forecast

Archived

Feb 9th, 2026–Feb 10th, 2026

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

Regions

Flathead, Lizard, Moyie, St. Mary.

Heightened avalanche conditions exist in specific terrain features where weak layers in the upper snowpack are possible to human-trigger.

Continually assess conditions as you travel.

Confidence

Moderate

  • We are confident that there are persistent slabs in the snowpack, but uncertain about how likely they are to trigger.

Avalanche Summary

On Sunday, explosive control work in the alpine produced a few cornice results and several persistent slab avalanches size 1 to 1.5, failing on the January weak layer described in the snowpack summary.

In the past week, human-triggered persistent slab avalanches on this layer were reported size 1 to 1.5, most occurring at treeline and above.

Snowpack Summary

Roughly 10 to 15 cm of wind affected new snow overlies a widespread variable crust on all but high alpine north facing terrain.

A weak layer of surface hoar on a melt-freeze crust, with a thick layer of facets below, formed in late January is buried 20 to 50 cm deep. This well developed layer is expected to become increasingly problematic as they get buried deeper.

The mid and lower snowpack remain well settled, with no significant concerns at this time.

Weather Summary

Monday Night
Mostly cloudy. 1 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -7 °C.

Tuesday
Mostly cloudy. 30 km/h west ridgetop wind. Treeline temperature -7 °C.

Wednesday
Sunny. 20 km/h west ridgetop wind. Treeline temperature -6 °C.

Thursday
Mostly sunny. 40 km/h west ridgetop wind. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Keep in mind a buried crust offers an excellent bed surface for avalanches.
  • Be aware of the potential for large avalanches due to buried surface hoar.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.