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Avalanche Forecast

Archived

Jan 11th, 2025–Jan 12th, 2025

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Lizard-Flathead, Flathead, Lizard.

Assess steep lines for wind slabs before committing.

Small rider triggerable slabs could still be found, due to previous strong wind they may be further down slope than expected.

Confidence

Moderate

Avalanche Summary

No new slab avalanches have been reported in the region since Wednesday.

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

Snowpack Summary

Ongoing westerly wind has heavily impacted the snowpack . Westerly slopes are scoured and isolated wind slabs could exist on leeward aspects in the alpine and treeline.

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 is generally well settled.

Snow depths at treeline range from 140 to 220 cm.

Weather Summary

Saturday Night

Mix of cloud and clear sky with trace amounts of snow possible. 20 to 30 km/h northwest ridgetop wind. Treeline temperature -12 °C.

Sunday

Mix of sun and cloud with trace amounts of snow possible. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -7 °C.

Monday

Mix of sun and cloud. 25 to 50 km/h northwest ridgetop wind. Treeline temperature -11 °C.

Tuesday

Mix of sun and cloud  with trace amounts of snow possible. 15 to 30 km/h west ridgetop wind. Treeline temperature -10 °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.
  • 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.