Severe · Winter Storm WarningActive alert
Winter Storm Warning issued October 11 at 11:30PM MDT until October 12
Affecting Helena Valley; Missouri Headwaters; Madison River Valley; Gallatin Valley
In effect until: Oct 12, 2026, 12:00 PM
Helena Valley; Missouri Headwaters; Madison River Valley; Gallatin Valley
Likely impact; effects through 12:00 PM.
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.
Read the original bulletin (official text)
* WHAT...Heavy snow. Additional snow accumulations up to two inches. Winds gusting as high as 40 mph. * WHERE...Helena Valley, Gallatin Valley, Madison River Valley, and Missouri Headwaters. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Travel could be very difficult. The wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™