Severe · Flash Flood WarningThis alert has expired. It is kept for reference.

Flash Flood Warning issued September 18 at 9:11PM MDT until September 18

Affecting Golden Valley, MT; Sweet Grass, MT

In effect until: Sep 19, 2026, 4:15 AM

Golden Valley, MT; Sweet Grass, MT

Likely impact across 2 counties in MT; effects through 4:15 AM.

Get to higher ground now. Never drive through flooded roads.

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Read the original bulletin (official text)

At 911 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 4.5 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flash flooding of small creeks and streams, highways,
streets and underpasses as well as other poor drainage and
low-lying areas.

Some locations that will experience flash flooding include...
Mainly rural areas of Southwestern Golden Valley and Northeastern
Sweet Grass Counties.

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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™

Flash Flood Warning issued September 18 at 9:11PM MDT until September 18

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