BULLETIN – EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
243 AM CDT FRI JUN 11 2010

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR…
MINNEHAHA COUNTY IN SOUTHEAST SOUTH DAKOTA
NORTHEASTERN TURNER COUNTY IN SOUTHEAST SOUTH DAKOTA
NORTHERN LINCOLN COUNTY IN SOUTHEAST SOUTH DAKOTA
NORTHWESTERN LYON COUNTY IN NORTHWEST IOWA
WESTERN ROCK COUNTY IN SOUTHWEST MINNESOTA

* UNTIL 530 AM CDT

* AT 240 AM CDT…NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. TWO TO THREE INCHES OF RAINFALL IS EXPECTED OVER THE WARNED AREA…CAUSING FLOODING. THE RAIN WILL FALL AT AN EXTREME RATE CAUSING FLOODING IN THE SIOUX FALLS METRO AREA.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE…SIOUX FALLS…BALTIC…BEAVER CREEK…BRANDON…CROOKS…GARRETSON…
HARRISBURG…HARTFORD…HILLS…LARCHWOOD…LESTER…PALISADES STATE PARK…ROWENA…SHERMAN…TEA…VALLEY SPRINGS AND WALL LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

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.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.