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Avalanche Forecast

Archived

Dec 31st, 2024–Jan 1st, 2025

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.

Surface instabilities may remain reactive to riders.

Choose low-consequence terrain and watch for signs of instability.

Confidence

Moderate

Avalanche Summary

No recent natural avalanche was reported, except evidence from last weekend's past cycle.

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

Snowpack Summary

Recent snow accumulations vary across the region. In localized areas, 30 to 50 cm of settling snow can be found. Deeper deposits are present on leeward slopes at higher elevations due to the previous southwest wind that accompanied the storm. Surface snow is moist snow below 1500 m and a substantial crust is found at lower elevations.

Below the recent 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

Tuesday Night

Mostly cloudy, with isolated flurries. 15 to 25 km/h southwest ridgetop wind. Treeline temperature -10 °C.

Wednesday

Cloudy with up to 5 cm of new snow. 15 to 25 km/h southwest ridgetop wind. Treeline temperature -10 °C.

Thursday

Mostly cloudy, with isolated flurries. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -8 °C.

Friday

Mostly cloudy, with isolated flurries. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -6 °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 the wind; once it starts to blow, sensitive wind slabs are likely to form.

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.