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 9, 1:35 PM CST, 4 hours 38 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 235 PM CDT TUE SEP 9 2003 LOTS TO CONSIDER TODAY...WITH THE CHANCE FOR RAIN AND THUNDERSTORMS THIS AFTERNOON THROUGH THURSDAY. BAND OF RAIN LIFTING NORTHEAST OVER FAR EASTERN CWA EARLY THIS AFTERNOON AS VORT LOBE ASSOCIATED LIFTS NORTH OVER THE WESTERN HIGH PLAINS. NEW SURGE OF ENERGY LIFTING INTO CENTRAL PLAINS WITH 250MB PROFILERS SHOWING NICE DIVERGENCE SETTING UP OVER NEBRASKA. PRECIP OVER NEBRASKA APPEARS TO BE COINCIDENT WITH LOW LEVEL THETA FORCING...WHICH LIFTS NORTH THIS EVENING...THEN REESTABLISHES AGAIN OVERNIGHT. WILL INCREASE POPS ACROSS THE CWA TO GO MORE IN LINE WITH GUIDANCE OR ABOVE TONIGHT THROUGH THURSDAY AS WAVE MOVING ONTO WESTERN U.S. VERY IMPRESSIVE. AXIS OF MAX PWAT VALUES REMAIN ACROSS CWA THROUGH THURSDAY NIGHT. MOST AREAS WILL SEE 60 TO 100 POPS DURING THIS TIME. SHOULD ALSO SEE A DECENT CHANCE OF A WIDESPREAD HALF AND INCH TO INCH AND A HALF OF RAINFALL AS BOUNDARY SLOW TO PUSH EAST DURING THIS TIME. STRONGER NORTHERN STREAM WAVE WILL MOVE ONTO THE NORTHERN PLAINS LATE THURSDAY...HELPING PUSH ALONG THE FRONT AND BRING IN COOLER TEMPERATURES. WILL BE LEANING TOWARDS SLOWER ETA SOLUTION AS NORTHWARD MOVING UPPER LEVEL ENERGY SHOULD LEAVE NOT DRIVE BOUNDARY TOO QUICKLY EAST. IN THE LATTER PERIODS...MODELS SUGGESTING A COOL DOWN FOR THE WEEKEND WITH REBOUNDING TEMPERATURES DURING THE BEGINNING OF THE WORKWEEK. ALSO KEEPING POPS IN FOR SATURDAY AS MID LEVEL BOUNDARY COULD SERVE TO FOCUS A FEW SHOWERS AS WELL AS SIGNIFICANT CLOUD COVER. .FSD...NONE 08
SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-IAZ001>003- 012>014-020>022-031-032-NEZ013-014-101200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 1122 AM CDT TUE SEP 09 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS... THE BEST CHANCES FOR SHOWERS AND AN ISOLATED THUNDERSTORM WILL MAINLY BE ALONG AND EAST OF INTERSTATE 29 THIS AFTERNOON...AS THE FIRST IN A SERIES OF UPPER AIR DISTURBANCES MOVES SLIGHTLY EASTWARD. A SECOND DISTURBANCE WILL MOVE UP FROM CENTRAL NEBRASKA OVERNIGHT TONIGHT...GIVING ANOTHER DECENT CHANCE FOR SHOWERS AND A FEW THUNDERSTORMS OVER THE AREA. WITH THE AMOUNT OF CLOUD COVER AROUND...HEATING WILL BE MINIMIZED TODAY NOT GIVING A GOOD SEVERE WEATHER THREAT AT ALL. THE BEST CHANCE FOR HEATING AND INSTABILITY THIS AFTERNOON WILL BE AROUND THE CHAMBERLAIN AREA...BUT OVERALL CHANCES FOR RAIN IN THAT AREA ARE NOT REAL GOOD. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY A VERY STRONG AND LARGE UPPER AIR DISTURBANCE WILL CONTINUE TO AFFECT THE ENTIRE AREA WEDNESDAY THROUGH THURSDAY MORNING. A SLIGHT RISK OF SEVERE WEATHER IS POSSIBLE ACROSS THE CHAMBERLAIN VICINITY ON WEDNESDAY...WHERE SOME HEATING MAY MATERIALIZE DESTABILIZING THE ATMOSPHERE. BUT FROM THE JAMES VALLEY AND EASTWARD...PLENTY OF CLOUD COVER IS ANTICIPATED MINIMIZING THE SEVERE WEATHER THREAT THROUGH STABILIZATION. HEAVY RAIN COULD BE A THREAT EAST OF THE JAMES VALLEY WEDNESDAY NIGHT...AHEAD OF THE VERY SLOWLY EASTWARD ADVANCING COLD FRONT. THE ATMOSPHERE WILL BE PLENTY SATURATED BY THEN. HOWEVER WITH THE RECENT DRY CONDITIONS...FLOODING SHOULD NOT BE A SERIOUS CONCERN AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.CRH.NOAA.GOV/FSD. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK.
The Sioux Falls radar (KFSD), 122 km away, was scanning. The volume nearest the first event began at 00:12 UTC.
1 flash flood. Local standard time, as filed.
Heavy rainfall of 3 to 5 inches caused a rapid overflow of a small creek.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nebraska in 2003Every state in 2003This day in weather historyWarnings in Nebraska, September 2003
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: 5337457.