A cold front moved south through the area, triggering showers and thunderstorms. A few of the storms produced severe weather and flash flooding.
Every event with a place to put it. 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 episode as NWS LSX wrote it up.
A cold front moved south through the area, triggering showers and thunderstorms. A few of the storms produced severe weather and flash flooding.
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 Jul 28, 3:27 PM CST, 2 hours 3 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ST LOUIS MO 427 PM CDT TUE JUL 28 2009 .DISCUSSION... /237 PM CDT TUE JUL 28 2009/ CDFNT DRAPPED THRU CNTL IL AND INTO NERN MO WILL CONTINUE TO SLOWLY DRIFT SEWD TNGT. NUMEROUS OUTFLOW BNDYS WILL CONTINUE TO MERGE THIS EVE PRODUCING DIFFICULTIES IN TIMING AND FINDING A GOOD FOCUS FOR STORMS. A SECONDARY CDFNT IS SETTELED ACRS NRN MO/SRN IA REGION. THIS CDFNT WILL HELP PUSH TSRA SWD THRU THE CWA TNGT. ANOTHER CDFNT WILL PUSH THRU THE AREA ON THURS AND WILL BRING TSRA TO THE REGION. MDLS ARE IN FAIRLY GOOD AGREEMENT. HOWEVER...THE NAM WAS THE FASTEST WITH REGARD TO TIMING. THE LOCAL WRF AND 12Z GFS AGREED WELL WITH TIMING AND PLACEMENT OF PRECIP AND TRENDED TWD THESE MDLS. BEHIND THIS FNT...HIGH PRESSURE BUILDS INTO THE REGION ALLOWING DRY AND COOL CONDITIONS TO SETTLE IN FOR A COUPLE OF DAYS. AS FOR TEMPS...TRENDED TWD THE COOLER MOS TEMPS. NRN PLAINS HAVE BEEN STRUGGLING TO GET ABOVE THE MID 70S BEHIND THE CDNFT. THEREFORE...HAVE CONTINUED THE COOL TREND FOR THE REMAINDER OF THE WEEK. FOR THE EXTD...DUE TO COMMS PROBLEMS...WE DID NOT RECIEVE THE 12Z ECMWF. DUE TO THE LACK OF THE LATEST ECMWF AND LOW CONFIDENCE WITH THE GFS SOLNS...FEW CHANGES WERE MADE TO THE PREV FCST. ONE FEATURE THE 28/00Z ECMWF AND 12Z GFS AGREE ON ARE PLACING A CDFNT ACRS THE NRN PORTIONS OF THE CWA. AMOUNT OF FORCING ASSOC WITH THE FNT IS UNCERTAIN...BUT BELIEVE THERE IS AT LEAST A CHC OF TSRA ACRS NERN MO SAT NGT. THE MAIN S/W SHUD BE JUST E OF THE CWA BY MIDDAY SUN. SUBSIDENCE BEHIND THE S/W SHUD HELP SUPPRESS CHC OF TSRA DURING THE DAY ON SUN. TEMPS SHUD BEGIN TO REBOUND FRI AND REACH THE MID 80S BY SAT. SOME UNCERTAINTY REMAINS DUE TO AMNT OF CLD COVER. TILLY && .AVIATION... /1240 PM CDT TUE JUL 28 2009/ FOR THE 18Z TAFS...SHORTWAVE TROF OVER KS/NE WILL INTERACT WITH SEWD MOVING CDFNT AND ADDITIONAL BDRY OVER SWRN MO TO PRODUCE NUMEROUS SCT SHRA/TSRA THIS AFTN AND EVENING. USED SREF GUIDANCE TO TIME WIND SHIFT AT TAF SITES AS IT SEEMS TO HAVE A REASONABLE HANDLE ON FROPA. WINDS WILL SHIFT TO THE NW BEHIND THE FRONT BUT GENERALLY STAY LIGHT THROUGH THE PD. KANOFSKY && .LSX WATCHES/WARNINGS/ADVISORIES... MO...NONE. IL...NONE. && WFO LSX
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 402 PM CDT TUE JUL 28 2009 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-291200- GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL- MARION IL-WASHINGTON IL-RANDOLPH IL-ADAMS IL-BROWN IL-PIKE IL- CALHOUN IL-JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL-KNOX-LEWIS- SHELBY-MARION-MONROE-RALLS-PIKE-BOONE-AUDRAIN-MONITEAU-COLE-OSAGE- CALLAWAY-MONTGOMERY-LINCOLN-GASCONADE-WARREN-ST. CHARLES-FRANKLIN- ST. LOUIS-ST. LOUIS CITY-JEFFERSON-CRAWFORD-WASHINGTON- ST. FRANCOIS-STE. GENEVIEVE-IRON-MADISON-REYNOLDS- 402 PM CDT TUE JUL 28 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. .DAY ONE...TONIGHT THUNDERSTORMS ARE LIKELY TONIGHT. WHILE ORGANIZED OR WIDESPREAD SEVERE WEATHER IS NOT EXPECTED...THERE MAY BE ISOLATED STRONG OR SEVERE THUNDERSTORMS. SOME OF THESE THUNDERSTORMS MAY ALSO PRODUCE LOCALLY HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE CHANCE OF THUNDERSTORMS WILL CONTINUE WEDNESDAY AND WEDNESDAY NIGHT...MAINLY ACROSS SOUTHEASTERN MISSOURI AND SOUTHWESTERN ILLINOIS. THUNDERSTORMS ARE LIKELY ACROSS THE REGION THURSDAY AS ANOTHER COLD FRONT MOVES THROUGH THE AREA. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT OBSERVED HAIL...WIND DAMAGE OR FLOODING. && FOR A GRAPHICAL VERSION OF THIS INFORMATION SEE OUR WEBPAGE AT (LOWERCASE)... HTTP://WWW.WEATHER.GOV/LSX/?N=HWO1 TILLY
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
338 PM CDT TUE JUL 28 2009
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION.. ST.. ...SOURCE....
..REMARKS..
0325 PM TSTM WND DMG FLORISSANT 38.80N 90.32W
07/28/2009 ST. LOUIS MO TRAINED SPOTTER
SMALL TREE BRANCHES DOWN NEAR SHACKELFORD RD AND
WIETHAUPT R
&&
EVENT NUMBER LSX0900039
SCHWEDLERPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
438 PM CDT TUE JUL 28 2009
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION.. ST.. ...SOURCE....
..REMARKS..
0400 PM HEAVY RAIN VERSAILLES 39.88N 90.66W
07/28/2009 E2.00 INCH BROWN IL EMERGENCY MNGR
A FEW ROADS IN EASTERN VERSAILLES HAVE 1-3 INCHES OF
STANDING WATER. 2 INCH RAINFALL RECEIVED IN ONE HOUR.
&&
EVENT NUMBER LSX0900040
SCHWEDLERPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
448 PM CDT TUE JUL 28 2009
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION.. ST.. ...SOURCE....
..REMARKS..
0443 PM FLOOD 5 E LATHAM 38.56N 92.59W
07/28/2009 MONITEAU MO TRAINED SPOTTER
ABOUT 6-8 INCHES OF WATER OVER STRAWBERRY RD NEAR ALLEE
RD.
&&
EVENT NUMBER LSX0900041
SCHWEDLERPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
506 PM CDT TUE JUL 28 2009
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION.. ST.. ...SOURCE....
..REMARKS..
0500 PM FLASH FLOOD 1 W HIGH POINT 38.48N 92.60W
07/28/2009 MONITEAU MO LAW ENFORCEMENT
HWY C IS COMPLETEY COVERED WITH WATER BETWEEN THE NORTH
AND SOUTH BRANCHES OF HWY CC.
&&
EVENT NUMBER LSX0900042
SCHWEDLERPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
546 PM CDT TUE JUL 28 2009
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION.. ST.. ...SOURCE....
..REMARKS..
0530 PM FLASH FLOOD 3 SSW MCGIRK 38.58N 92.50W
07/28/2009 MONITEAU MO TRAINED SPOTTER
SMALL STREAM FLOODING REPORTED IN THE AREA. 3 INCHES
RAINFALL RECEIVED IN LAST TWO HOURS.
&&
EVENT NUMBER LSX0900043
SCHWEDLERPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
601 PM CDT TUE JUL 28 2009
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION.. ST.. ...SOURCE....
..REMARKS..
0415 PM TSTM WND DMG 1 SE CALIFORNIA 38.62N 92.55W
07/28/2009 MONITEAU MO EMERGENCY MNGR
TOP SNAPPED OFF OF TREE...DAMAGED PORTION IS 12 INCHES
IN DIAMETER
&&
EVENT NUMBER LSX0900044
JPThe St Louis radar (KLSX), 108 km away, was scanning. The volume nearest the first event began at 23:28 UTC.
1 flash flood. Local standard time, as filed.
Two to four inches of rain fell in a short amount of time causing flash flooding. Several roads were flooded including a couple of streets in Milton.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2009Every state in 2009This day in weather historyWarnings in Illinois, July 2009
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: 188535.