1 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sioux Falls, SD wrote its last area forecast discussion before the first event at Sep 14, 8:40 PM CST, 39 minutes earlier.
AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA NATIONAL WEATHER SERVICE SIOUX FALLS SD 940 PM CDT CDT TUE SEP 14 2004 .DISCUSSION.. HAVE CANCELLED FLASH FLOOD WARMING FOR PARTS OF NORTHWEST IOWA WITH NO SERIOUS FLOODING PROBLEM BEING REPORTED AS OF 02Z. DID HOWEVER KEEP THE FLASH FLOOD WATCH GOING FOR NERN NEBRASKA ACROSS NW IOWA IN SW MINNESOTA UNTIL 300 AM FOR POSSIBLE HEAVY RAIN IN TSTMS THAT CONTINUE TO DEVELOP. QUESTION COMES IN HOW FAR NORTH BOUNDARY TO SOUTH WILL LIFT NORTH TONIGHT AS WAVE COMES UP FROM THE SOUTHWEST. AS 0230Z TSTMS WERE DEVELOPING FURTHER BACK TO THE SW ALONG THE MISSOURI RIVER. FOR NOW DO NOT SEE ANYTHING SEVERE AND TALKING TO SPC THEY WILL NOT ISSUE ANY ADDITIONAL WATCH FOR OUR AREA...WILL LET CURRENT WATCH EXPIRE AT 03Z. WILL DO UPDATE TO ZONES AND GRIDS TO ADJUST TIMING AND LOCATION OF PCP AREA OTHERWISE LOW TEMPS FOR TONIGHT LOOK OK. .FSD...WATCHES/WARNINGS/ADVISORIES... SD...FLOOD WATCH TNGT XTRM SERN SD UNION CO MN...FLOOD WATCH TNGT JACKSON CO IA...FLOOD WATCH TNGT ALL OF NWRN IA XCP LYON CO NE...FLOOD WATCH TNGT DIXON AND DAKOTA COS && WB
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 1147 AM CDT TUE SEP 14 2004 SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098- IAZ001>003-012>014-020>022-031-032-NEZ013-014-151200- AURORA-BEADLE-BON HOMME-BROOKINGS-BRULE-BUENA VISTA IA- CHARLES MIX-CHEROKEE IA-CLAY-CLAY IA-COTTONWOOD MN-DAKOTA NE- DAVISON-DICKINSON IA-DIXON NE-DOUGLAS-GREGORY-HANSON-HUTCHINSON- IDA IA-JACKSON MN-JERAULD-KINGSBURY-LAKE-LINCOLN-LINCOLN MN- LYON IA-LYON MN-MCCOOK-MINER-MINNEHAHA-MOODY-MURRAY MN-NOBLES MN- OBRIEN IA-OSCEOLA IA-PIPESTONE MN-PLYMOUTH IA-ROCK MN-SANBORN- SIOUX IA-TURNER-UNION-WOODBURY IA-YANKTON- 1147 AM CDT TUE SEP 14 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS... THUNDERSTORMS WILL REDEVELOP NEAR A VERMILLION TO SPENCER IOWA LINE AFTER 4 PM THIS AFTERNOON. SOME STORMS MAY BECOME SEVERE LATE THIS AFTERNOON AND EARLY THIS EVENING ALONG AND SOUTH OF A VERMILLION TO SPIRIT LAKE LINE. VERY HEAVY RAINFALL...HAIL THE SIZE OF HALF DOLLARS AND WIND GUSTS TO 60 MPH ARE THE MAIN THREATS. AN ISOLATED TORNADO WILL ALSO BE POSSIBLE ALONG AND JUST SOUTH OF THIS FRONT. THE THREAT FOR TORNADOES WILL BE MAINLY SOUTH OF A SIOUX CITY TO LINN GROVE LINE. FLOODING... THUNDERSTORMS THAT DEVELOP THIS AFTERNOON AND EVENING OVER NORTHEAST NEBRASKA...NORTHWEST IOWA...FAR SOUTHEAST SOUTH DAKOTA AND FAR SOUTHERN MINNESOTA WILL HAVE THE POTENTIAL TO PRODUCE VERY HEAVY RAINFALL. SOME LOCATIONS COULD SEE AMOUNTS OF 2 TO 4 INCHES...WITH HOURLY RAINFALL RATES APPROACHING TWO INCHES. A FEW RIVERS....CREEKS AND STREAMS COULD APPROACH BANKFULL AND URBAN FLOODING WILL ALSO BE POSSIBLE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE LIKELY AFTER 500 PM CDT. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.CRH.NOAA.GOV/FSD. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK. 08
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
515 PM CDT TUE SEP 14 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0448 PM HAIL 9 NNE KINGSLEY 42.71N 95.90W
09/14/2004 0.75 INCH PLYMOUTH IA PUBLIC
&&
WBPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
522 PM CDT TUE SEP 14 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0455 PM HAIL 3 SSW CLEGHORN 42.77N 95.74W
09/14/2004 1.25 INCH CHEROKEE IA TRAINED SPOTTER
&&
WBPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
532 PM CDT TUE SEP 14 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0515 PM HAIL SIOUX CITY 42.50N 96.39W
09/14/2004 1.25 INCH WOODBURY IA TRAINED SPOTTER
NORTHEAST SIDE OF SIOUX CITY.
&&
WBSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 952 PM CDT TUE SEP 14 2004 IAZ014-021-022-031-032-NEZ013-014-150310- BUENA VISTA IA-CHEROKEE IA-CLAY IA-DAKOTA NE-DIXON NE-IDA IA- WOODBURY IA- 952 PM CDT TUE SEP 14 2004 ...SEVERE THUNDERSTORM WATCH NUMBER 819 WILL BE ALLOWED TO EXPIRE AT 10 PM CDT... THE VALID PORTIONS OF SEVERE THUNDERSTORM WATCH NUMBER 819 WILL BE ALLOWED TO EXPIRE AT 10 PM CDT. THIS INCLUDES BUENA VISTA... CHEROKEE...CLAY...IDA AND WOODBURY COUNTIES OF NORTHWEST IOWA...AND DIXON AND DAKOTA COUNTIES IN EXTREME NORTHEAST NEBRASKA. THUNDERSTORMS WILL CONTINUE AT TIMES OVERNIGHT...BUT THE THREAT OF WIDESPREAD SEVERE WEATHER HAS ENDED ACROSS THE AREA. LOCALLY HEAVY RAINFALL WILL BE THE MAIN THREAT FROM THESE STORMS OVERNIGHT...AND A FLOOD WATCH FOR FLASH FLOODING REMAINS IN EFFECT UNTIL 3 AM CDT. CHAPMAN
The Sioux Falls radar (KFSD), 129 km away, was scanning. The volume nearest the first event began at 03:21 UTC.
1 flash flood. Local standard time, as filed.
Rainfall estimated at 3 to 6 inches caused flooding of streets and basements.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2004Every state in 2004This day in weather historyWarnings in Iowa, September 2004
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5424518.