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Avalanche Forecast

Archived

Mar 10th, 2026–Mar 11th, 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, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Lizard-Flathead, Akamina, Flathead, Lizard, Moyie.

Recent wind has varied in direction, so watch for wind slabs on all aspects.

Persistent slabs may remain possible to trigger at upper elevations.

Confidence

Moderate

  • We are confident that there are persistent slabs in the snowpack, but uncertain about how likely they are to trigger.
  • We are uncertain due to a limited number of field observations.

Avalanche Summary

No new avalanches were reported on Monday.

Snowpack Summary

Variable winds have redistributed 3 to 15 cm of recent snow.

The recent snow sits on a 1 to 10 cm thick crust. The thickness of the crust depends on elevation.

At upper elevations, where the crust is thinner or not present, it may still be possible to trigger persistent slabs on multiple buried weak layers of surface hoar and/or crusts in the top 120 cm of the snowpack.

The mid/lower snowpack is well settled and strong in most areas.

Weather Summary

Tuesday Night
Mostly cloudy. 40 km/h southwest ridgetop wind. Treeline temperature -10 °C.

Wednesday
Cloudy. 0 to 3 cm of snow, then another 15 to 20 cm overnight. 50 km/h west ridgetop wind. Treeline temperature -9 °C.

Thursday
Cloudy. 0 to 10 cm of snow. 60 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Friday
Mostly cloudy. 5 to 10 cm of snow. 30 km/h west ridgetop wind. Treeline temperature -7 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Recent wind has varied in direction, so watch for wind slabs on all aspects.
  • If triggered, wind slabs may step down to deeper layers, causing larger avalanches.
  • Be aware of the potential for large avalanches due to buried surface hoar.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.

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.