507
WGUS73 KFSD 170649
FFSFSD
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
149 AM CDT SUN MAY 17 2026
IAC149-SDC127-171015-
/O.CON.KFSD.FF.W.0001.000000T0000Z-260517T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PLYMOUTH IA-UNION SD-
149 AM CDT SUN MAY 17 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 AM CDT EARLY THIS
MORNING FOR SOUTHWESTERN PLYMOUTH AND EAST CENTRAL UNION COUNTIES...
AT 149 AM CDT, DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. BETWEEN 2
AND 3 INCHES OF RAIN HAVE FALLEN. THE EXPECTED RAINFALL RATE IS 1 TO
1.5 INCHES 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 AND AUTOMATED GAUGES.
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.
BE AWARE OF YOUR SURROUNDINGS AND DO NOT DRIVE ON FLOODED ROADS.
LAT...LON 4266 9666 4273 9671 4277 9636 4265 9634
4263 9654
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...1-1.5 INCHES IN 1 HOUR
SG
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