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Avalanche Forecast

Archived

Jan 10th, 2025–Jan 11th, 2025

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

Regions

Lizard-Flathead, Flathead, Lizard.

Keep an eye on changing conditions.

Wind slabs have likely formed near ridge crests.

Confidence

Moderate

Avalanche Summary

Small human triggered wind slab avalanches continue to be reported in the region. These avalanches have been on a variety of aspects at treeline and above.

Check out this MIN describing one of these avalanches.

If you are headed into the backcountry please consider sharing your observations via the Mountain Information Network.

Snowpack Summary

New wind slabs likely formed on all aspects throughout Friday due to strong northwest and southwest winds combined with light snowfall.

The upper snowpack contains a variety of layers including a surface hoar layer just below the surface in sheltered terrain and a crust on or near the surface on solar aspects.

The mid and lower snowpack are generally well settled.

Snow depths at treeline range from 140 to 220 cm.

Weather Summary

Friday Night

Cloudy with light snowfall 1 to 5 cm. 50 to 70 km/h northwest ridgetop wind. Treeline temperature -8 °C.

Saturday

Cloudy with light snowfall 1 to 2 cm of snow. 15 to 25 km/h southwest ridgetop wind. Treeline temperature -6 °C.

Sunday

Cloudy with light snowfall 1 to 2 cm. 15 to 25 km/h west ridgetop wind. Treeline temperature -8 °C.

Monday

Mix of sun and cloud. 15 to 25 km/h west ridgetop wind. Treeline temperature -9 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep terrain.
  • Recent wind has varied in direction, so watch for wind slabs on all aspects.
  • Seek out sheltered terrain where new snow hasn't been affected by wind.

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.