Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Dec 6th, 2024–Dec 7th, 2024

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

Regions

Lizard-Flathead, Flathead, Lizard, Moyie, St. Mary.

Storm slabs will build as the new snow piles up during the day. Treat the danger as one step higher if you see greater than 20 cm of new snow.

Confidence

Moderate

Avalanche Summary

As the snow piles up, storm slab avalanche activity is expected to increase at all elevations.

No avalanches were reported on Friday.

Snowpack Summary

New snow will be falling on a mix of sun crusts, surface hoar in wind-sheltered spots, and wind-affected snow.

The middle of the snowpack is generally expected to be well-settled and stable. An unreactive melt-freeze crust is near the ground.

Total snow depths vary from 100 to 150 cm at treeline.

Weather Summary

Friday Night

Cloudy. 40 to 60 km/h southwest ridgetop wind. Treeline temperature -4 °C with a temperature inversion.

Saturday

Cloudy with 5 to 15 cm of snow. 30 to 60 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Sunday

A mix of sun and cloud with up to 10 cm ending in the morning. 20 km/h northwest ridgetop wind. Treeline temperature -8 °C.

Monday

Mostly sunny. 20 km/h west ridgetop wind. Treeline temperature -7 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Minimize exposure during periods of heavy loading from new snow and wind.

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.