Rapidly rising water is possible for rivers and streams in Waterloo, Cedar Falls and areas to the west and south for the next several hours. A flash flood warning is posted for southwestern Black Hawk, all of Grundy, eastern Hardin and northern Tama counties until 2:45 a.m. Monday (June 30, 2014).

Thunderstorms dumped heavy rain over already saturated soil Sunday evening, prompting the National Weather Service to issue the flash flood warning.

As the storms entered Tama County from the west, weather officials received a report that two inches of rain had fallen in Lincoln in 45 minutes. Other reports of two and two-and-a-half-inch rainfall was reported between Hudson and Traer, extending east to Dysart and La Porte City.

The following is the weather statement issued by the National Weather Service around 8:30 p.m. on Sunday (June 29, 2014):

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR... SOUTHWESTERN BLACK HAWK COUNTY IN NORTHEAST IOWA... NORTHERN TAMA COUNTY IN CENTRAL IOWA... EASTERN HARDIN COUNTY IN CENTRAL IOWA... GRUNDY COUNTY IN CENTRAL IOWA...

* UNTIL 245 AM CDT MONDAY

* AT 843 PM CDT... DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING HEAVY RAIN UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. ADDITIONAL RAINFALL UP TO 2 INCHES IS POSSIBLE OVER SOUTHERN GRUNDY AND NORTHERN TAMA COUNTIES.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... WATERLOO... CEDAR FALLS... GRUNDY CENTER... EVANSDALE... HUDSON... TRAER... REINBECK... DYSART... DIKE... ELK RUN HEIGHTS... CONRAD... CROSSROADS MALL... WASHBURN... WELLSBURG... HOLLAND... BEAMAN... LINCOLN... WHITTEN... MORRISON AND TF CLARK STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
TURN AROUND... DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU CAN DO SO SAFELY.