Severe · Flash Flood WarningActive alert
Flash Flood Warning issued September 20 at 3:08AM CDT until September 20
Affecting Benton, IA; Cedar, IA; Iowa, IA; Johnson, IA; Jones, IA; Linn, IA
In effect until: Sep 20, 2026, 1:00 PM
Benton, IA; Cedar, IA; Iowa, IA; Johnson, IA; Jones, IA; Linn, IA
Likely impact across 6 counties in IA; effects through 1:00 PM.
Get to higher ground now. Never drive through flooded roads.
Read the original bulletin (official text)
At 308 AM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. Additional rainfall amounts of 1 to 3 inches are possible in the warned area. 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, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. Some locations that will experience flash flooding include... Cedar Rapids, Anamosa, Vinton, Marengo, Mechanicsville, Stanwood, Marion, Hiawatha, Mount Vernon, Robins, Belle Plaine, Center Point, Lisbon, Fairfax, Solon, Ely, Atkins, Walford, Springville and Palo. This includes Interstate 380 between mile markers 8 and 36.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™