Severe · Flash Flood WarningActive alert
Flash Flood Warning issued October 1 at 6:01AM CDT until October 1
Affecting Black Hawk, IA; Butler, IA; Grundy, IA; Tama, IA
In effect until: Oct 1, 2026, 3:45 PM
Black Hawk, IA; Butler, IA; Grundy, IA; Tama, IA
Likely impact across 4 counties in IA; effects through 3:45 PM.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. For the latest stream observations and forecasts refer to weather.gov/desmoines/water.
Read the original bulletin (official text)
At 601 AM CDT, Local law enforcement reported thunderstorms producing heavy rain across the warned area. Between 2 and 4 inches of rain have fallen. Additional rainfall amounts up to 1 inch are possible in the warned area. Flash flooding is ongoing. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Law enforcement reported street flooding on several streets in Cedar Falls. 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... Waterloo, Cedar Falls, Grundy Center, Evansdale, Hudson, Reinbeck, Dike, Elk Run Heights, Uni-Dome And McLeod Center, Waterloo Municipal Airport, Crossroads Mall, Washburn, Dunkerton, Raymond, Wellsburg, New Hartford, Holland, Stout and Morrison. This includes Interstate 380 between mile markers 65 and 73.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™