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Avalanche Forecast

Archived

Dec 29th, 2024–Dec 30th, 2024

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, human triggered possible.
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.

Don't let the recent snow lure you into consequential terrain.

Storm slabs might still be sensitive to triggering by riders.

Confidence

Moderate

Avalanche Summary

Recent explosive control produced large slabs failing within the new storm snow (size 2.5) near Fernie.

On Saturday, a natural avalanche cycle occurred with storm slabs (size 2) and cornice failures on northerly alpine slopes near Fernie.

Skiers also produced several small loose dry avalanches (size 1.5) on steep sheltered treeline slopes.

If you head out in the backcountry, let us know what you are seeing by submitting a MIN report!

Snowpack Summary

New snow accumulations vary across the region. In localized areas, 30 to 50 cm of fresh snow is found. The southwest wind has redistributed this new snow, forming deeper deposits on leeward slopes at higher elevations.

Below the new snow, a thick melt-freeze crust exists below approximately 1500 m.

The mid and lower snowpack is generally well-settled and stable.

Snow depths at treeline range from 140 to 220 cm.

Weather Summary

Sunday Night

Cloudy with up to 5 cm of new snow. 5 to 15 km/h northeast ridgetop wind. Treeline temperature -6 °C.

Monday

Cloudy with up to 5 cm of new snow. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -8 °C.

Tuesday

Cloudy with up to 2 cm of new snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -10 °C.

Wednesday

Cloudy with up to 2 cm of new snow. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -10 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
  • Be careful with sluffing in steep terrain, especially above cliffs and terrain traps.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

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.