Severe · Flash Flood WarningActive alert
Flash Flood Warning issued September 20 at 5:04AM 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 504 AM CDT, Doppler radar indicated a large area of light to moderate rain was occurring across the warned area. Heavy rain producing storms earlier brought rainfall of 2 to 5 inches across the warned area. Flash flooding is either ongoing or expected to begin shortly due to runoff from the earlier heavy rain combined with the steady rain falling. 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™