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 9, 1:30 AM CST, 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ST LOUIS MO 230 AM CDT WED MAY 9 2001 INITIAL 500 FLOW PTRN OF NW FLOW ACRS RGN WILL FLATTEN OUT AS SERIES OF S/WVS ROLL ACRS THE MIDWEST THRU THE PD. AT H3, ETA AND NGM ARE SMLR FOR MIDN TNGT WITH SGNFNT DVRGC ACRS IA BCK INTO SE NEB WHILE AVN FCSTS BULLSEYE ACRS SD. 850 TEMPS IN THE MID TEENS ARE FCST ACRS MUCH OF AREA TODAY AND WITH SGNFT SUNSHINE, WOOD EXPCT HIGHS TO BE IN THE LOW-MID 80S. MAV TEMPS AND POPS LOOK BTR THAN FWCS AND WILL TREND TWD THESE. NGM TIME CROSS SECTS SHOW LTL MSTR FOR TODAY WITH EXTSV HI LVL MSTR AVBL ON THU. TEMPS SHOULD RCH THE LOW TO MID 80S AGN ACRS MST OF AREA WITH SLY FLOW. AVN FCSTS FNT TO SAG INTO THE NRN OZARKS BY NOON FRI WITH S/WVS ROLLG OUT OF KS UNDR NW FLOW ALFT. LRG HI BUILDS IN ON SAT WITH FNT FCST ACRS NRN AR. NO MAJOR CHANGES NEEDED TO EXTNDD. .STL...NONE
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
The Mississippi river rose over its banks along the Monroe County shoreline. The only areas that flooded were a few roads and farmland on the inside of the levees.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2001Every state in 2001This day in weather historyWarnings in Illinois, 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: 5244878.