486
WGUS73 KFSD 061837
FFSFSD
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
137 PM CDT SUN SEP 6 2026
IAC119-143-MNC105-062100-
/O.CON.KFSD.FF.W.0012.000000T0000Z-260906T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LYON IA-OSCEOLA IA-NOBLES MN-
137 PM CDT SUN SEP 6 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 4 PM CDT THIS
AFTERNOON FOR NORTHEASTERN LYON, NORTHWESTERN OSCEOLA AND SOUTHERN
NOBLES COUNTIES...
AT 137 PM CDT, DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
THUNDERSTORMS PRODUCING HEAVY RAIN MOVING BACK INTO THE AREA FROM THE
WEST, ESPECIALLY NEAR THE MINNESOTA-IOWA STATE LINE FROM ELLSWORTH TO
BIGELOW. BETWEEN 2 AND 3.5 INCHES OF RAIN HAVE FALLEN ACROSS THE
WARNED AREA. THE EXPECTED RAINFALL RATE IS 1 TO 3 INCHES IN 1 HOUR.
ADDITIONAL RAINFALL AMOUNTS OF 1.5 TO 3 INCHES ARE POSSIBLE IN THE
WARNED AREA. FLASH FLOODING IS ONGOING OR EXPECTED TO BEGIN SHORTLY.
HAZARD...FLASH FLOODING CAUSED BY 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...
WORTHINGTON, ELLSWORTH, LITTLE ROCK, RUSHMORE AND BIGELOW.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND, DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
BE AWARE OF YOUR SURROUNDINGS AND DO NOT DRIVE ON FLOODED ROADS.
FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS, RIVERS, OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.
PLEASE REPORT OBSERVED FLOODING TO LOCAL EMERGENCY SERVICES OR LAW
ENFORCEMENT AND REQUEST THEY PASS THIS INFORMATION TO THE NATIONAL
WEATHER SERVICE WHEN YOU CAN DO SO SAFELY.
LAT...LON 4350 9605 4360 9605 4367 9563 4367 9549
4344 9564 4343 9586 4349 9605
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...1-3 INCHES IN 1 HOUR
JH
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page