A strong weather system moved through southern Missouri and Illinois with lots of rainfall along and north of the I-70 corridor. Numerous roads were flooded due to the heavy rainfall.
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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 strong weather system moved through southern Missouri and Illinois with lots of rainfall along and north of the I-70 corridor. Numerous roads were flooded due to the heavy rainfall.
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 Oct 22, 3:38 PM CST, 1 hour 43 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ST LOUIS MO 438 PM CDT THU OCT 22 2009 .DISCUSSION... /438 PM CDT THU OCT 22 2009/ ...SYNOPSIS... LONG WAVE PATTERN FEATURES RIDGING OVER BOTH THE PACIFIC AND ATLANTIC OCEANS WITH A BROAD TROF OVER THE CENTRAL CONUS. A CLOSED LOW OVER KS WILL OPEN AS IT LIFTS NE. AT THE SURFACE...SURFACE LOW OVER WESTERN MO HAS A WARM FRONT EXTENDING NE THROUGH NORTHERN MO INTO NORTHERN IN AND A COLD FRONT SOUTHWARD INTO EASTERN TX. A SECONDARY AREA OF LOW PRESSURE IS STRENGHTING ALONG THE COLD FRONT IN SW AR. ...SHORT TERM (TONIGHT THRU SUNDAY)... MODELS IN GOOD AGREEMENT ON PROGRESSION OF CURRENT SYSTEM. NORTHERN SURFACE LOW WILL WEAKEN AS THE LOW OVER AR BECOMES DOMINANT OVERNIGHT. SYSTEM HAS PLENTY OF MOISTURE TO WORK WITH AS REMNANTS OF RICK ARE CONTRIBUTING TO THE PRECIP OVER AR THIS AFTERNOON. 30 KT LLJ CONTINUES TO THE EAST OF SURFACE LOW OVERNIGHT. SURFACE LOW TO MOVE TO SOUTHERN IL BY 12Z...SO PRECIP SHOULD CONTINUE ALL NIGHT EAST OF THE STL METRO. OVER CENTRAL MO...AREA SHOULD GET DRY SLOTTED WITH LOW CLOUDS AND DRIZZLE OVERNIGHT. LOW LEVEL MOISTURE HANGS AROUND THROUGH SATURDAY WITH A COUPLE OF IMPULSES THAT MAY PRODUCE SOME ADDITIONAL LIGHT QPF. LOW CONTINUES TO PULL NE ON FRIDAY...BUT BROAD CYCLONIC FLOW WILL KEEP A CHANCE OF PRECIP ACROSS MAINLY THE NORTHERN CWA UNTIL THE TROF PASSES ON SATURDAY. ADDITIONAL SHORT WAVE TO AFFECT THE AREA FRIDAY NIGHT AND DRAG A WEAK COLD FRONT THROUGH WITH LIGHT PRECIP IN RESPONSE. MAIN FOCUS FOR MEASURABLE PRECIP WILL BE NORTH AND NORTHEAST OF THE STL METRO. WENT ON THE COOLER SIDE OF GUIDANCE WITH PLENTY OF CLOUDS AND EXPECTED PRECIP. ...LONG TERM (SUNDAY NIGHT THUR THURSDAY)... UNSETTLED PATTERN CONTINUES WITH PLENTY OF CLOUDS AND ADDITIONAL CHANCES FOR PRECIP. OVERALL LONG WAVE PATTERN TO HOLD THROUGH THE PERIOD WITH A BROAD TROF OVER THE CENTRAL US WITH A SERIES OF SHORT WAVES. THE FIRST AFFECTS THE REGION LATE SUNDAY INTO MONDAY. MODELS VARY ON STRENGTH OF THE SYSTEM...BUT SHOULD BE ENOUGH FORCING TO GENERATE AT LEAST LIGHT SHOWERS. ANOTHER SHORT BREAK MONDAY NIGHT BEFORE THE NEXT SYSTEM BEGINS TO ENCROACH THE AREA ON TUESDAY. AS THE AREA TRANSITIONS TO SW FLOW ALOFT...AN EXTENDED PERIOD OF UNSETTLED WEATHER BEGINS. ONLY HAVE MENTIONABLE POPS THRU WEDNESDAY...BUT MODELS HINT AT SEVERAL PERIODS OF PRECIP THRU THE END OF THE WEEK. DID NOT FEEL CONFIDENT ENOUGH ATTM TO INCLUDE ANY POPS FURTHER OUT. AS IN THE SHORT TERM...LONG WAVE TROUGH WILL COUPLE WITH CLOUDS AND PRECIP TO KEEP TEMPS ON THE COOL SIDE. TUESDAY LOOKS TO BE THE WARMEST DAY OF THE WEEK AS RETURN SOUTHERLY FLOW BRINGS IN WARM MOIST AIR FROM THE GULF. MILLER && .AVIATION... /1245 PM CDT THU OCT 22 2009/ FOR THE 18Z TAFS... EXPECT IFR/LIFR CEILINGS ACROSS MOST OF THE REGION THROUGH TONIGHT BASED ON EXPANSIVE AREA OF LOW CLOUDS ACROSS THE CNTRL CONUS. WIDESPREAD STEADY RAIN SHOULD CONTINUE INTO THIS EVENING AND THEN DECREASE TO DRIZZLE/OCCASIONAL LIGHT RAIN THE REST OF THE NIGHT BEFORE ENDING AFT 12Z FRIDAY WHEN A COLD FRONT MOVES ACROSS THE REGION. E-SELY WINDS WILL BECOME WLY AND INCREASE TOMORROW MORNING BEHIND FROPA. BRITT && .LSX WATCHES/WARNINGS/ADVISORIES... MO...NONE. IL...NONE. && WFO LSX
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 402 PM CDT THU OCT 22 2009 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-231130- 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 THU OCT 22 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. .DAY ONE...TONIGHT LOCALLY HEAVY RAINFALL IS POSSIBLE OVERNIGHT ACROSS SOUTHEAST MISSOURI AND SOUTHERN ILLINOIS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO RELAY PRECIPITATION REPORTS TO THE NATIONAL WEATHER SERVICE. && FOR A GRAPHICAL VERSION OF THIS INFORMATION SEE OUR WEBPAGE AT (LOWERCASE)... HTTP://WWW.WEATHER.GOV/LSX/?N=HWO1 MILLER
The St Louis radar (KLSX), 138 km away, was scanning. The volume nearest the first event began at 23:20 UTC.
6 flash flood. Local standard time, as filed.
Between 2 and 3 inches of rain fell in a short amount of time on saturated soils causing flash flooding. Numerous roads were flooded countywide, including Highway CC at Tri City Road between Sturgeon and Centralia.
Up to three inches of rain fell in a short amount of time on saturated soils causing flash flooding. Numerous roads were flooded including Highway 151 southeast of Novelty.
Up to three inches of rain fell in a short amount of time on saturated soils causing flash flooding. Numerous roads were flooded including Highway W northeast of Shelbyville.
Up to three inches of rain fell in a short amount of time on saturated soils causing flash flooding. Numerous roads were flooded including County Roads 223 and 221 west of Kingdom City.
Up to three inches of rain fell in a short amount of time on saturated soils causing flash flooding. Several roads in Paris were flooded.
Up to three inches of rain fell in a short amount of time on saturated soils causing flash flooding. Numerous secondary roads were flooded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2009Every state in 2009This day in weather historyWarnings in Missouri, October 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 2026-10-01. Each event’s entry at NCEI: 200409, 200410, 200411, 200412, 200413, 200415.