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 7th, 2024–Dec 8th, 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 possible, human triggered probable.
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, Flathead, Lizard, Moyie, St. Mary.

The snowpack needs time to adjust to the new snow.

Keep terrain choices low-angle and safe as the storm snow settles.

Confidence

Moderate

Avalanche Summary

A few small rider-triggered storm slabs were reported on Saturday near Fernie.

Snowpack Summary

15 cm of new snow with more on the way sits 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

Saturday Night

Mostly cloudy with 5 to 15 cm of snow. 30 to 60 km/h southwest ridgetop wind. Treeline temperature -8 °C.

Sunday

Mostly cloudy. 35 km/h west ridgetop wind. Treeline temperature -8 °C.

Monday

A mix of sun and cloud. 20 km/h northwest ridgetop wind. Treeline temperature -9 °C.

Tuesday

A mix of sun and cloud. 20 km/h west ridgetop wind. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • As the storm slab problem worsens, the easy solution is to choose more conservative terrain.
  • Minimize exposure during periods of heavy loading from new snow and wind.
  • Don't let storm day fever lure you into consequential terrain.

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.