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Avalanche Forecast

Archived

Nov 30th, 2024–Dec 1st, 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.
Below Treeline
Natural avalanches unlikely.

Regions

Lizard-Flathead, Akamina, Flathead, Lizard, Moyie, St. Mary, Crowsnest South.

Travel with caution around steep wind-affected slopes.

Field data is limited; We'd love to see your MIN reports if you are out in the mountains!

Confidence

Moderate

Avalanche Summary

Small wind slabs (size 1) were triggered with ski cutting and explosives on Thursday.

Snowpack Summary

Last week's 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

Saturday Night

Partially cloudy with up to 1 cm of snow. 15 to 40 km/h southwest ridge top wind. Treeline temperature -6 °C.

Sunday

A mix of sun and cloud. 15 to 30 km/h west ridge top wind. Treeline temperature -5 °C.

Monday

Mostly clear. 12 to 30 km/h southwest ridge top wind. Treeline temperature -4 °C.

Tuesday

Mostly clear. 12 to 30 km/h southwest ridge top wind. Treeline temperature 0 °C with an above-freezing layer developing between 2000 m to 3000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Seek out sheltered terrain where new snow hasn't been affected by wind.
  • 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.