Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

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Last Map Update: Thu, Jun 18, 2026 at 6:20:34 am MDT

Watches, Warnings & Advisories

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National Weather Service Great Falls, MT

There are no watches, warnings, or advisories at this time.

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!