082
WGUS53 KFSD 302101
FFWFSD
IAC119-141-167-302300-
/O.NEW.KFSD.FF.W.0023.250830T2101Z-250830T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
401 PM CDT SAT AUG 30 2025
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN LYON COUNTY IN NORTHWESTERN IOWA...
NORTHWESTERN O'BRIEN COUNTY IN NORTHWESTERN IOWA...
NORTHEASTERN SIOUX COUNTY IN NORTHWESTERN IOWA...
* UNTIL 600 PM CDT.
* AT 401 PM CDT, DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. BETWEEN 2 AND 4 INCHES OF RAIN
HAVE FALLEN. THE EXPECTED RAINFALL RATE IS 3 TO 5 INCHES IN 1
HOUR. ADDITIONAL RAINFALL AMOUNTS OF 0.5 TO 1 INCH ARE POSSIBLE IN
THE WARNED AREA. FLASH FLOODING IS ONGOING OR EXPECTED TO BEGIN
SHORTLY.
HAZARD...FLASH FLOODING CAUSED BY 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...
SHELDON, ARCHER AND MATLOCK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND, DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
LAT...LON 4329 9587 4329 9586 4326 9586 4326 9582
4314 9566 4310 9573 4315 9587 4327 9599
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...3-5 INCHES IN 1 HOUR
JM
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