966
WGUS53 KFSD 170610
FFWFSD
IAC149-SDC127-171015-
/O.NEW.KFSD.FF.W.0001.260517T0610Z-260517T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
110 AM CDT SUN MAY 17 2026
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN PLYMOUTH COUNTY IN NORTHWESTERN IOWA...
EAST CENTRAL UNION COUNTY IN SOUTHEASTERN SOUTH DAKOTA...
* UNTIL 515 AM CDT.
* AT 110 AM CDT, DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. BETWEEN 1.5 AND 2.5 INCHES OF
RAIN HAVE FALLEN. THE EXPECTED RAINFALL RATE IS 0.5 TO 1 INCH IN 1
HOUR. ADDITIONAL RAINFALL AMOUNTS OF 0.5 TO 1.5 INCHES ARE
POSSIBLE IN THE WARNED AREA. FLASH FLOODING IS ONGOING OR EXPECTED
TO BEGIN SHORTLY.
HAZARD...FLASH FLOODING CAUSED BY SLOW MOVING THUNDERSTORMS.
SOURCE...RADAR.
IMPACT...FLASH FLOODING OF SMALL CREEKS AND STREAMS, URBAN
AREAS, HIGHWAYS, STREETS AND UNDERPASSES AS WELL AS
OTHER POOR DRAINAGE AND LOW-LYING AREAS.
* SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
ELK POINT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND, DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
LAT...LON 4266 9666 4273 9671 4277 9636 4265 9634
4263 9654
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...0.5-1 INCH IN 1 HOUR
SG
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