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 4th, 2024–Dec 5th, 2024

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

Regions

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

While the snowpack is generally expected to be stable, continually monitor and assess conditions as you travel, especially around steep, sun-exposed slopes.

Confidence

Moderate

Avalanche Summary

On Wednesday, explosives triggered small (size 1) wind slabs in the region.

Snowpack Summary

New surface hoar is being reported on the snow surface in sheltered terrain while wind-affected snow surfaces are being reported in exposed terrain at higher elevations.

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

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

Weather Summary

Wednesday Night

Mainly clear. 15 to 30 km/h west ridgetop wind. Treeline temperature near 0 °C with a temperature inversion.

Thursday

Mainly sunny. 15 to 30 km/h southwest ridgetop wind. Treeline temperature near 0 °C with a temperature inversion.

Friday

A mix of sun and cloud. 20 to 40 km/h southwest ridgetop wind. Treeline temperature near 0 °C with the temperature inversion beginning to break down through the day.

Saturday

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

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Periods of low danger may be a good time to increase your exposure.
  • Make observations and continually assess conditions as you travel.
  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.

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.