OFFICIAL · Severe weather

Winter Weather Advisory issued October 10 at 10:40PM MDT until October 11 at 6:00PM MDT by NWS Great Falls MT

Observed Oct 11 2026, 04:40 UTC · Updated Oct 11 2026, 09:52 UTC

* WHAT...For the Winter Weather Advisory, wet snow. Total snow accumulations up to two inches. Winds gusting as high as 40 mph. For the Winter Storm Warning, heavy, wet snow expected. Total snow accumulations between 4 and 8 inches. * WHERE...Gallatin Valley. * WHEN...For the Winter Weather Advisory, until 6 PM MDT Sunday. For the Winter Storm Warning, from 6 PM Sunday to 9 AM MDT Monday. * IMPACTS...Travel could be very difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. The hazardous conditions will impact the Monday morning commute. * ADDITIONAL DETAILS...Snowfall amounts will vary drastically from grassy surfaces to roadways, most notably at lower elevations, with accumulations on non-grassy surfaces being confined mainly to between the evening through late morning hours. If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

Location 45.731, -111.121. ARC Warning did not create the underlying report.

Sources

• OFFICIAL

  nws

  Winter Weather Advisory issued October 10 at 10:40PM MDT until October 11 at 6:00PM MDT by NWS Great Falls MT

  Oct 11 2026, 04:40 UTC

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