Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Click a location below for detailed forecast.

Last Map Update: Wed, Jun 17, 2026 at 10:48:28 am MDT

Watches, Warnings & Advisories

Zoom Out

National Weather Service Great Falls, MT

Red Flag Warning

Thunderstorms Saturday

Heads up for your weekend plans! ⛈️ We're tracking thunderstorms moving into north-central Idaho and southwest Montana this Saturday. If you are heading out to recreate, be prepared for shifting conditions. The main hazards include: - Heavy Rain: Rates up to 0.50" per hour. - Lightning: Dangerous for outdoor activities and brings a risk of new fire starts. - Winds: Gusts pushing 50 mph, especially in southwest MT. Have a backup plan to get indoors quickly if you hear thunder, and keep a close eye on the sky!