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309 

RWUS32 KFSD 210504

FFSFSD

IAZ020-031-210600-



FLASH FLOOD STATEMENT

NATIONAL WEATHER SERVICE SIOUX FALLS SD

1205 AM CDT FRI APR 20 2001



...FLASH FLOOD WARNING CONTINUES UNTIL 100 AM CDT FOR...



...SOUTHERN PLYMOUTH COUNTY IN NORTHWEST IOWA...

...NORTHERN WOODBURY COUNTY IN NORTHWEST IOWA...



AS OF 1203 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 

THE RAIN HAD ENDED ACROSS THE WARNING AREA. HOWEVER ADDITIONAL RISES 

IN AREAS STREAMS...AND RUNOFF FROM EARLIER HEAVY RAINS COULD STILL 

CAUSE FLASH FLOODING THROUGH 1 AM CDT. 



AT 1135 PM CDT...WOODBURY COUNTY LAW ENFORCEMENT OFFICIALS REPORTED 

NUMEROUS CARS STALLED IN ROADWAYS...AROUND THE MORNINGSIDE AREA OF 

SIOUX CITY.  WATER WAS ALSO FLOODING BASEMENTS IN A NUMBER OF HOMES 

IN THAT AREA.  



BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE

DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT

QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY

IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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