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Avalanche Forecast

Archived

Jan 11th, 2024–Jan 12th, 2024

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 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.

Regions

Lizard-Flathead, Akamina, Flathead, Lizard.

Allow the recent storm and wind slabs time to bond and stabilize.

Extreme cold significantly increases the consequences of an incident in the backcountry.

Confidence

Moderate

Avalanche Summary

Numerous storm slab avalanches at all elevations were reported since the weekend. Up to size 2 and both naturally and explosive triggered,

If you go out in the backcountry, please consider sharing your observations on the Mountain Information Network (MIN).

Snowpack Summary

Northerly winds at all elevations have redistributed roughly 30 to 60 cm of low-density snow. This new snow has buried various old surfaces, including surface hoar in sheltered alpine terrain and sun-crusts on steep south-facing terrain.

The mid and lower snowpack is generally well bonded with a series of crusts and facetted snow.

The average snow depth at treeline is approximately 70 to 150 cm.

Weather Summary

Thursday Night

Partly cloudy with no precipitation, northeast winds up to 50 km/h at all elevations, treeline temperature -35 °C.

Friday

Sunny with no precipitation, northwest winds up to 30 km/h at all elevations, treeline temperature -35 °C.

Saturday

Sunny with no precipitation, northwest alpine winds 10 to 30 km/h, treeline temperature -30 °C.

Sunday

Sunny with no precipitation, northeast winds up to 30km/h at all elevations, treeline temperature -28 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Avoid freshly wind loaded features, especially near ridge crests, roll-overs and in steep terrain.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.

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.