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

Mar 22nd, 2025–Mar 23rd, 2025

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

Regions

Lizard-Flathead, Flathead, Lizard.

Storm slabs formed a few days ago and remain possible to trigger.

A warm, wet storm will arrive on Sunday evening and elevate danger.

Confidence

Moderate

Avalanche Summary

Several natural and artificially triggered size 1 to 2 storm slab avalanches have occurred daily since Thursday.

With ongoing flurries, these slabs remain possible for human triggering.

Snowpack Summary

20 to 30 cm of recent snow and southwest wind have formed storm slabs. 60 cm of snow sits on a melt-freeze crust, except on high-elevation north and east-facing slopes.

A surface hoar or facet layer from late January is buried 100 to 150 cm deep on north and east aspects at treeline and above. This may re-emerge as a persistent slab problem with warming this week.

Weather Summary

Saturday Night

Mostly cloudy with 1 to 2 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -6 °C.

Sunday

Cloudy with 1 to 5 cm of snow in the afternoon. 50 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1500 m.

Monday

Snow transitioning to rain with 5 to 15 mm. 50 km/h southwest ridgetop winds. Treeline temperature +1 °C. Freezing level rising to 2400 m.

Tuesday

Cloudy with 5 to 15 mm of rain then partly clearing skies in the afternoon. 20 km/h southwest ridgetop winds. Treeline temperature +6 °C. Freezing level rising to 2700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Cautiously approach steep slopes that are open or sparsely treed.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.
  • Use small, low consequence slopes to test the bond of the new snow.

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.