THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR…
LYON COUNTY IN NORTHWEST IOWA
NORTHERN UNION COUNTY IN SOUTHEAST SOUTH DAKOTA
NORTHWESTERN PLYMOUTH COUNTY IN NORTHWEST IOWA
SOUTHEASTERN LINCOLN COUNTY IN SOUTHEAST SOUTH DAKOTA
WESTERN SIOUX COUNTY IN NORTHWEST IOWA

* UNTIL 200 PM CDT

* AT 1048 AM CDT…NATIONAL WEATHER SERVICE DOPPLER RADAR
INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. AROUND 1 INCH OR MORE OF RAIN IS EXPECTED TO FALL IN
ABOUT A 20 TO 30 MINUTE PERIOD AS THESE STORMS MOVE THROUGH. THIS
RAIN WILL BE FALLING ON ALREADY SATURATED GROUND DUE TO THE HEAVY
RAINS THIS PAST WEEKEND…SO RUNOFF FROM THESE RAINS WILL QUICKLY
LEAD TO FLOODING.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE…
CANTON…HAWARDEN…ROCK RAPIDS…AKRON…ALCESTER…ALVORD…
CRAIG…DOON…FAIRVIEW…GEORGE…HUDSON…HULL…INWOOD…
IRETON…LARCHWOOD…LESTER…LITTLE ROCK…NEWTON HILLS STATE
PARK…ROCK VALLEY AND SIOUX CENTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS…HIGHWAYS AND UNDERPASSES. ADDITIONALLY…COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS…STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.