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 St. Louis, MO wrote its last area forecast discussion before the first event at Apr 30, 12:30 PM CST, 14 hours earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ST LOUIS MO 130 PM CDT FRI APR 30 2004 .DISCUSSION... CONVECTION CONTS TO DVLP ACRS THE WRN HALF OF THE CWA ATTM AHD OF MCV MOVG NEWD THRU SWRN MO. SFC MOISTURE CNVG MAXIMIZED ACRS SWRN INTO CNTRL MO ALNG/AHD OF CDFNT AND ALNG THUNDERSTORM OUTFLOW BNDRYS. THIS CONVECTION MAY INTENSIFY DRNG THE LATE AFTN INTO THE EARLY EVNG HOURS FM STL SWD AS MSAS CURRENTLY SHOWING SFC LI VALUES DOWN TO -6 TO -7 JUST SW OF STL. PLAN TO PUT THE HIGHEST POPS AND QPF THIS EVNG FM STL S AND E WHERE STG SFC MOISTURE CNVG WILL BE STGST ALNG OUTFLOW BNDRYS AND WHERE INSTABILITY WILL BE MAXIMIZED DUE TO PLENTY OF DAYTIME HTG. AS MID-UPR LVL TROF DPNS OVR THE NRN PLAINS THE CDFNT WILL MOV SEWD THRU THE CWA TGT. WILL MENTION LOCALLY HVY RAINS TGT...ALTHOUGH THE BEST AND MORE WIDESPREAD POTENTIAL FOR HVY RAINS AND POSSIBLE FLOODING APR TO BE SW OF THE CWA ACRS ERN OK AND AR WHERE LLJ WILL FOCUS THE BEST LOW LVL TEMP AND MOISTURE ADVCTN LT TGT...AND WHERE SFC MOISTURE CNVG WILL BE MAXIMIZED VICINITY OF A SFC WV ALNG THE FRONT AS SHOWN BY THE ETA MDL LATE TGT AND SAT MRNG. THE GFS MDL APRS TO HAVE SOME GRID SCALE FEEDBACK PROBLEMS...INTENSIFYING VORT MAX MOVG NEWD THRU ERN OK INTO NRN AR TGT TOO MUCH AND TOO RAPIDLY ALNG WITH UPR DIVERGENCE AND SFC REFLECTION. PREFER WKR...SLOWER AND FURTHER S SFC WV ALNG CDFNT AS DEPICTED BY THE ETA MDL. THIS SFC WV WILL KEEP PCPN GOING OVR THE SRN AND ERN PTN OF THE CWA INTO SAT AFTN. ETA MDL DEPICTS RELATIVELY STG UPR DIVERGENCE MAINLY S AND SE OF STL ON SAT IN RGT ENTRANCE REGION OF UPR LVL JT STRK WHICH WILL INTENSIFY AS IT MOVS NEWD THRU THE GRT LKS REGION AHD OF UPR LVL TROF. PCPN WILL TAPER OFF FM NW TO SE SAT AFTN FOLLOWED BY A CLRG SKY AS SFC AND 850 MB DWPTS LWR BHND SFC CDFNT/850 MB TROF. WITH CAA...CLRG SKY...SFC DWPTS DROPPING INTO THE UPR 30S TO LWR 40S...AND DIMINISHING SFC WNDS SHOULD SEE UNSEASONABLY COOL TEMPS FOR SAT NGT. WILL MENTION LOW POPS SUN AFTN AND EVNG AS BOTH ETA AND GFS SHOW VORT MAX DROPPING SEWD THRU CWA INTO THE BASE OF THE MID-UPR LVL TROF...ALNG WITH COLD MID LVL TEMPS WHICH MAY LEAD TO SCT DIURNAL...INSTABILITY TYPE SHRA ACTIVITY. && .LSX WATCHES/WARNINGS/ADVISORIES... .MO...NONE. .IL...NONE. GKS
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE ST LOUIS MO 1221 AM CDT SAT MAY 1 2004 ILZ058>060-064-065-069-070-074-095>102-MOZ018-019-026-027-034>036- 041-042-047>052-059>065-011100- ADAMS IL-AUDRAIN-BOND IL-BOONE-BROWN-CALHOUN IL-CALLAWAY-CLINTON IL- COLE-FAYETTE IL-FRANKLIN-GASCONADE-GREENE IL-JEFFERSON-JERSEY IL- KNOX-LEWIS-LINCOLN-MACOUPIN IL-MADISON IL-MARION-MARION IL-MONITEAU- MONROE-MONROE IL-MONTGOMERY-MONTGOMERY IL-OSAGE-PIKE-PIKE IL-RALLS- SHELBY-ST CHARLES-ST CLAIR IL-ST LOUIS-ST LOUIS CITY-WARREN- WASHINGTON IL- 1221 AM CDT SAT MAY 1 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND EAST CENTRAL MISSOURI...AS WELL AS SOUTHWEST ILLINOIS... .DAY ONE...REST OF TONIGHT NO HAZARDOUS WEATHER IS EXPECTED FOR THE REMAINDER OF THE NIGHT. SHOWERS AND EMBEDDED THUNDERSTORMS WILL OVERSPREAD THE AREA THE THROUGH THE NIGHT. SOAKING RAINS ARE LIKELY BUT THE RAIN SHOULD NOT BE HEAVY ENOUGH TO CREATE ANY SIGNIFICANT PROBLEMS DUE TO RUNOFF. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SHOWERS AND THUNDERSTORMS ARE EXPECTED TO LINGER OVER THE AREA SATURDAY MORNING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT. ILZ079-MOZ072>075-084-085-099-011100- CRAWFORD-IRON-MADISON-RANDOLPH IL-REYNOLDS-ST FRANCOIS-STE GENEVIEVE- WASHINGTON- 1221 AM CDT SAT MAY 1 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST MISSOURI AND A SMALL PART OF SOUTHWEST ILLINOIS... .DAY ONE...THE REST OF TONIGHT SHOWERS AND THUNDERSTORMS WILL OVERSPREAD THE AREA THROUGH THE NIGHT. SOME STORMS WILL CONTAIN HEAVY RAIN AND THERE IS SOME RISK THAT SOME OF THE THUNDERSTORMS WILL FOLLOW ONE ANOTHER. THIS COULD RESULT IN RAINFALL AMOUNTS OF UP TO TWO INCHES OVERNIGHT AND LOCAL FLOODING COULD OCCUR. HAZARDOUS WEATHER IS POSSIBLE DUE TO LOCALLY HEAVY RAINFALL FOR THE REST OF THE NIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SHOWERS AND THUNDERSTORMS ARE EXPECTED TO LINGER OVER THE AREA THROUGHOUT MOST OF THE DAY ON SATURDAY. A FEW OF THE STORMS MAY STILL BE CAPABLE OF PRODUCING HEAVY DOWNPOURS...ESPECIALLY DURING THE MORNING. THE ANTECEDENT RAINFALL FROM OVERNIGHT WILL INCREASE THE THREAT OF FLOODING SHOULD HEAVY RAINFALL OCCUR DURING THE DAY SATURDAY. KEEP ABREAST OF LOCAL WEATHER DEVELOPMENTS AND POSSIBLE WARNINGS FOR YOUR AREA DURING THE DAY SATURDAY. SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY DURING THE DAY SATURDAY. PEDIGO
The national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
Rainfall up to 3 inches caused flash flooding across the county. Crooked Creek flooded way out of its banks as did several other small streams. Roberts Cemetary, Bales, and Old Mines roads were all reported flooded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2004Every state in 2004This day in weather historyWarnings in Missouri, May 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: 5396559.