The National Weather Service warned Sept. 10 that repeated rounds of thunderstorms could bring flash flooding and damaging winds to Hamilton County, including Evendale, Woodlawn, Sharonville and Springdale.

The Hazardous Weather Outlook from the NWS office in Wilmington, issued at 4:39 a.m., said heavy rainfall from repeated storm rounds could trigger flash flooding. A few strong storms may also produce gusty winds, the agency said.

Storms are expected in two waves Thursday: before 2 p.m. and again after 4 p.m., according to the Dayton Daily News. The chance of precipitation sits at 70 percent, with highs near 80. Storm activity should taper off before 7 p.m., giving way to a mostly cloudy night with a low around 62.

Fair weather is forecast to return Friday, Sept. 11, with mostly sunny skies and a high near 82.

The NWS said the probability of widespread hazardous weather from Friday through the following Wednesday is low. Spotter activation is not expected during that period.

The storm system moved into the area Wednesday night, Sept. 9, when rain chances hit 90 percent and temperatures dropped to around 70. The storms cap a summer that brought flash flooding, severe wind and a tornado to Hamilton County.

That pattern is one reason Hamilton County's Emergency Management and Homeland Security Agency (EMHSA) is updating its multi-hazard mitigation plan. The agency is asking residents to weigh in through an anonymous online survey at hcema.org/Survey2026, open through Sept. 21.

"People should take the survey because it informs our elected leaders and our decision makers about what's important and what's a priority for the residents," EMHSA Assistant Director Ryan McEwan told WVXU on Sept. 9. McEwan said the string of severe weather events this summer should have preparedness on the forefront of residents' minds.

Residents who want a paper copy of the survey can email [email protected] or call 513-946-8000.