Flash Flood Warning for Sioux Falls and Surrounding Area

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR...NORTHWESTERN LYON COUNTY IN NORTHWESTERN IOWA...SOUTHERN MINNEHAHA COUNTY IN SOUTHEASTERN SOUTH DAKOTA...EASTERN HUTCHINSON COUNTY IN SOUTHEASTERN SOUTH DAKOTA...NORTHWESTERN UNION COUNTY IN SOUTHEASTERN SOUTH DAKOTA...
YANKTON COUNTY IN SOUTHEASTERN SOUTH DAKOTA...CLAY COUNTY IN SOUTHEASTERN SOUTH DAKOTA...SOUTHEASTERN MCCOOK COUNTY IN SOUTHEASTERN SOUTH DAKOTA...LINCOLN COUNTY IN SOUTHEASTERN SOUTH DAKOTA...SOUTHEASTERN BON HOMME COUNTY IN SOUTHEASTERN SOUTH DAKOTA...TURNER COUNTY IN SOUTHEASTERN SOUTH DAKOTA...

* UNTIL 230 PM CDT

* AT 1131 AM CDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. ONE TO
THREE INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS
EXPECTED TO BEGIN SHORTLY.

ADDITIONAL RAINFALL AMOUNTS OF UP TO 2 INCHES ARE POSSIBLE IN THE
WARNED AREA. FLASH FLOODING WILL PRIMARILY AFFECT URBAN AREAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON`T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.