Severe Weather and Heavy Rain from the Ohio Valley to the Mid-Atlantic; Heat Persists in the South-Central U.S.

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected across portions of the Ohio Valley into southern Mid-Atlantic and Carolinas. Rounds of strong thunderstorms are expected to develop across the northern and central Plains. Sweltering heat remains most persistent across the South-Central Plains and Lower/Middle Mississippi Valley through next week. Read More >

Click a location below for detailed forecast.

Last Map Update: Sat, Sep 5, 2026 at 9:40:11 pm MDT

Watches, Warnings & Advisories

Zoom Out

National Weather Service Great Falls, MT

Red Flag Warning

Special Weather Statement

Hydrologic Outlook

Much More Rain & A Fall-Like Chill

Strong Thunderstorms: Sunday Afternoon and Evening

Widespread showers and seasonably cool temperatures will persist across the Northern Rockies through Tuesday morning. Expect high temperatures generally in the 50s and 60s by Monday for most valleys, which is 10-20 degrees below normal for early September. Scattered showers and thunderstorms will develop on Saturday and Sunday, bringing the potential for brief heavy rain, lightning, small hail, and gusty winds of 25 to 45 mph. The heaviest and most widespread rain will arrive later Sunday into Monday as an upper low moves through the region. Most locations have a high probability of seeing at least a half-inch of rain from Sunday morning through Tuesday morning. There is a 60% chance for areas in Northwest and West-Central Montana to see MUCH higher totals of over 2 inches of rain.

Heads up for Sunday afternoon and evening! ⛈️ We are tracking the potential for strong thunderstorms developing between 2:00 PM and 10:00 PM across the region. The main hazards include: Gusty winds over 50 mph Hail & frequent lightning Very heavy downpours (up to 0.75"/hour) Flash Flood Note: Take a look at the dark green shaded area on the map. These specific locations have a low risk (5% chance) for localized flash flooding, especially in flood-prone areas. Stay weather-aware tomorrow, have a way to receive warnings, and remember to head indoors if you hear thunder!