1 heavy rain, 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 St. Louis, MO wrote its last area forecast discussion before the first event at May 9, 1:30 AM CST, 9 hours 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ST LOUIS MO 230 AM CDT FRI MAY 9 2003 SEVERE WEATHER THREAT DRIFTNG INTO ESTRN IL AND IN...CANCEL WATCHES FOR THE ENTIRE CWA. WX CONTINUES TO BE UNSTABLE...DEWPOINT IN THE UPPER AND LOWER 70S ACRS THE AREA...WARM FRNT HAS PUSHED NORTH OF STL...DEWPIONT IN UIN STIL IN THE LOWER 60S. TODAY...LIS IN THE -7 TO -10 RANGE...MAVS FCST HAS POPS IN THE 30S RANGE. FWC AND MET PLAY WITH A VERY LOW POPS...I INTRODUCE 30% POPS ACRS THE ENTIRE AREA. TONIGHT AND SATURDAY THERE IS A CHANCE FOR ANOTHER ROUND OF SHWRS AND TSTMS. CONVECTIVE OUTLOOK CALLS FOR MDT RISK UNTIL MID NIGHT TNGT...AND SLGT RISK WILL CONTINUE THROUGH SATURDAY. THINKS ARE BEGIN TO LOOK BETTER SUNDAY AND FOR THE FIRST PART OF NEXT WEEK. A COLD FRONT WILL BE PUSH ACR CWA SAT NIGHT...TEMPS WILL BE BACK TO NORMAL. HIGHS IN THE UPPER 60S AND 70S AND LOW IN THE UPPER 40S AND 50S. .STL...NONE
ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-092300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 500 AM CDT FRI MAY 9 2003 ...AN OUTBREAK OF SEVERE THUNDERSTORMS IS EXPECTED OVER THE REGION FOR LATE THIS AFTERNOON AND TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND EASTERN MISSOURI AND WEST CENTRAL AND SOUTHWEST ILLINOIS. .DAY ONE...TODAY AND TONIGHT THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS FOR LATE THIS AFTERNOON AND TONIGHT FROM MONROE COUNTY THROUGH RALLS...SOUTH TO MONTGOMERY AND GASCONADE AND WEST INCLUDING ALL COLUMBIA METRO AREA. FOR THE REST OF THE THE AREA WE WILL BE UNDER A SLIGHT RISK OF SEREVE THUNDERSTORM. WIND SHEAR AND INSTABILITY PARAMETERS SUGGEST THAT THESE STORMS ARE CAPABLE OF PRODUCING ISOLATED TORNADOES...HAIL UP TO THE SIZE OF BASEBALLS AND WIND GUSTS IN EXCESS OF 70 MPH. IN ADDITION...LOCALLY HEAVY RAINFALL CAN BE EXPECTED WITH THESE STORMS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH WEDNESDAY THE RISK OF SEVERE WEATHER AND LOCALLY HEAVY RAINFALL WILL CONTINUE THROUGH SATURDAY NIGHT AS A FRONTAL BOUNDARY STALLS OVER THE REGION. THE GREATEST LIKELIHOOD OF SEVERE WEATHER WILL OCCUR LATE SATURDAY AND SATURDAY NIGHT AS A STRONG COLD FRONT MOVES THROUGH THE MIDWEST. AFTER A REST ON SUNDAY THROUGH TUESDAY...THE CHANCE OF THUNDERSTORMS IS IN STORE FOR WEDNESDAY THROUGH THURSDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL CONTINUE TO BE APPRECIATED FOR LATE THIS AFTERNOON AND THROUGH TONIGHT. && MORE INFORMATION MAY BE OBTAINED AT... HTTP://WWW.CRH.NOAA.GOV/LSX (ALL LOWER CASE)
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
A 17 year old man was killed when he tried to cross a flooded low-water crossing in a horse and buggy. The horse made it across safely.
As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.
| Event | Date | Age | Sex | Where | Kind |
|---|---|---|---|---|---|
| Heavy Rain, Monroe | 2003-05-09 | 17 | Male | Other | Direct |
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2003Every state in 2003This day in weather historyWarnings in Missouri, May 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: 5357513.