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Avalanche Forecast

Archived

Dec 2nd, 2024–Dec 3rd, 2024

Alpine
Natural avalanches unlikely, human triggered possible.
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, Moyie, St. Mary.

Use caution when navigating steep, wind-affected terrain.

Field observations are limited—if you’re in the mountains, please share your MIN reports with us!

Confidence

Moderate

Avalanche Summary

Small wind slabs (size 1) have been triggered with ski cutting and explosives in the past few days.

Snowpack Summary

40 to 60 cm of snow remains soft in sheltered areas, but may have formed reactive slabs in wind-affected terrain. A crust exists near the ground, with total snow depths of 100 to 150 cm at treeline.

Weather Summary

Monday Night

Mainly clear. 15 to 30 km/h west ridge top wind. Treeline temperature -3 °C.

Tuesday

Mainly clear. 10 to 15 km/h southwest ridge top winds. Treeline temperature -2 °C.

Wednesday

Mainly clear. 10 to 15 km/h southwest ridge top wind. Treeline temperature -2 °C.

Thursday

A mix of sun and cloud. 15 to 25 km/h southwest ridge top wind. Treeline temperature -1 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected 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.