1 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 May 1, 1:00 PM CST, 0 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ST LOUIS MO 200 PM CDT TUE MAY 1 2001 140 KT H3 JET AT PDX THIS MRNG WILL BE SGNFNT FACTOR FOR WX PTRN ACRS MIDWEST TNGT AND WED. ETA FCSTS DECENT DVRGC ACRS WRN IA BY MIDN WITH 2ND BULLSEYE ACRS GRT LKS. JET STREAK FCST TO LIE ACRS SERN CANADA WED NGT WITH DECENT DVRGC ACRS NRN MO. NGM AND ETA SMRL FOR MIDN WITH FCST OF 50+ 850 KT ACRS KS WITH ETA STRNGR AS USUAL. COLD FNT FCST TO SETTLE INTO THE ST BY 12Z WED AND LIE ACRS THE NW CRNR. WITH UPR FLOW PTRN PARALEL TO FNT, DONT EXPCT IT TO MOVE MUCH BEYOND A UIN-ICT LN. MODELS ARE SMLR WITH BEST THETA-E ADVCTN AND MSTR CNVGC AT 850 TO CONT ACRS NRN PTN OF AREA. LAPS DATA AT 18Z SHOWED NO SGNFNT BOUNDARY OR FOCUS MECHANISM FOR TSTMS AT THIS POINT. EXPCT MAIN FOCUS TO BE TO OUR NW WITH THICKNESS FCST BRINGING TSTMS SEWD INTO PTNS OF AREA LT TNGT. IN THE EXTNDD PD, CLOSED H5 LOW FCST NR UTS ZION NATL PARK BY MRF, ECMWF AND UK FOR FRI MRNG. THE MRF AND ECMWF ARE CLOSE FOR SUN MRNG WITH CLOSED LOW OVR THE SAND HILLS OF NEB WITH RDG OVR THE OH VLY. SYSTM FCST TO LIFT SLOWLY NWD BY SAT MRNG WITH RDG PERSISTING ACRS THE MS VLY. S/WV SWINGING INTO VANCOUVER ISLAND SAT EVE WILL NUDGE THE S/WV EWD AND IT IS FCST TO MOVE INTO THE MIDWEST ON MON. MRF SLIDES LRG SFC HI ACRS THE MIDWEST ON SAT. .STL...NONE
ILZ058>060-064-065-069-070-074-079-095-097>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-020100- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1145 AM CDT TUE MAY 1 2001 THREAT: THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS NORTHEAST MISSOURI AND A PORTION OF WEST CENTRAL ILLINOIS...ALONG AND NORTHWEST OF A LINE FROM MOBERLY MISSOURI TO QUINCY ILLINOIS. WHEN: LATE TONIGHT. SITUATION: A COMPLEX OF THUNDERSTORMS IS EXPECTED TO DEVELOP OVER SOUTHEAST NEBRASKA AND SOUTHWEST IOWA TONIGHT AHEAD OF AN ADVANCING COLD FRONT. THESE THUNDERSTORMS WILL MOVE SOUTHEASTWARD INTO NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS AFTER MIDNIGHT. SOME OF THESE STORMS MAY BE SEVERE...CONTAINING LARGE HAIL AND DAMAGING WINDS.
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
The Mississippi River rose a bit over flood stage for a few days. Flooding was limited to a few roads right along the river. Location Flood Stage CrestSt. Louis 30 ft 30.6 ft on 05/21/01
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2001Every state in 2001This day in weather historyWarnings in Missouri, May 2001
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: 5244882.