Storms developed over the region due to the remnants of Tropical Storm Bonnie. This produced areas of heavy rain which fell onto already saturated soils, causing 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.
Storms developed over the region due to the remnants of Tropical Storm Bonnie. This produced areas of heavy rain which fell onto already saturated soils, causing 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 26, 10:30 AM CST, 3 hours 50 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED AVIATION NATIONAL WEATHER SERVICE ST LOUIS MO 1130 AM CDT MON JUL 26 2010 .UPDATE... /1103 AM CDT MON JUL 26 2010/ 12Z UPPER AIR ANALYSIS DEPICTS VERY MOIST/TROPICAL AIRMASS SLOWLY ADVECTING BACK INTO THE MIDWEST. THIS PLUME OF MOISTURE CAN EASILY BE IDENTIFIED ON WATER VAPOR IMAGERY BEING ADVECTED TO THE NORTHEAST BETWEEN THE UPPER LOW ACROSS TEXAS AND THE BERMUDA HIGH ACROSS THE SOUTHEASTERN CONUS. NOTHING REMAINS OF TROPICAL DEPRESSION BONNIE. LOOKING AT LATEST SPC MESOANALYSIS...RUC...AND HRRR IT APPEARS BEST COVERAGE OF THUNDERSTORMS WILL BE ACROSS CENTRAL MISSOURI AND THE EASTERN OZARKS WHERE LITTLE CIN IS LEFT AND CAPES OF AROUND 3000 J/KG EXIST. FURTHER EAST THE INFLUENCE OF THE SURFACE RIDGE WILL KEEP CONVECTION AT BAY...WITH CAPES LESS THAN 1000 J/KG. I DON'T EXPECT ANY WIDESPREAD SEVERE WEATHER...BUT WOULDN'T BE SURPRISED IF WE SEE A FEW WET MICROBURSTS WITH SUCH A TROPICAL SOUNDING. IN FACT...WITH PRECIPITABLE WATER VALUES APPROACHING TWO INCHES AGAIN AND EXPECTED SLOW STORM MOTION THIS AFTERNOON...LOCALLY HEAVY RAINFALL AND FLASH FLOODING WILL BE POSSIBLE. THIS WILL BE ESPECIALLY TRUE IF THIS OCCURS OVER ANY URBAN BASINS...SUCH AS COLUMBIA. CVKING && .DISCUSSION... /304 AM CDT MON JUL 26 2010/ MAIN FORECAST ISSUE TO DEAL WITH IN THE SHORT TERM IS PCPN CHANCES TODAY AND AGAIN ON TUESDAY...DUE TO FRONTAL BOUNDARY LIFTING BACK NORTH ACROSS REGION AND REMNANTS OF T.S. BONNIE THAT WILL BE INTERACTING WITH THIS BOUNDARY. FOR TODAY...WILL START OFF DRY ACROSS MOST OF THE REGION...SO BACKED OFF ON POPS EXCEPT FOR FAR SOUTHERN 8 COUNTIES WHERE CONVECTION SHOULD BEGIN TO FIRE UP JUST NORTH OF FRONTAL BOUNDARY...THEN INCREASED POPS FOR THE AFTERNOON HOURS AS BOUNDARY SLOWLY LIFTS TO THE NORTH. DEPENDING ON CLOUDS AND PCPN...TEMPS WILL BE SIMILAR TO YESTERDAY WITH HIGHS IN THE MID TO UPPER 80S. FEEL THAT MOST OF THIS ACTIVITY WILL BE DIURNALLY DRIVEN...SO POPS TO DROP OFF AFTER SUNSET...THEN SEE DRY CONDITIONS AFTER 06Z TONIGHT. LOWS TONIGHT WILL BE IN THE UPPER 60S TO LOWER 70S. BY TUESDAY...FRONTAL BOUNDARY WILL CONTINUE TO TRACK NORTHWARD ACROSS THE AREA WITH SOME SCATTERED SHOWERS AND THUNDERSTORMS. FEEL THAT ONCE AGAIN ACTIVITY WILL BE DIURNALLY DRIVEN...SO PCPN TO TAPER OFF TOWARDS SUNSET. THEN ON WEDNESDAY...HEAT AND HUMIDITY TO BE BACK IN FULL FORCE WITH HIGHS IN THE LOW TO MID 90S AND HEAT INDICES IN THE 100 TO 105 RANGE DURING THE AFTERNOON HOURS. COULD SEE SOME ISOLATED SHOWERS AND THUNDERSTORMS IN THE WARM SECTOR...BUT COVERAGE WILL BE SPOTTY. OTHERWISE...THE NEXT WEATHER SYSTEM WILL BEGIN TO SINK TO THE SOUTH INTO THE FORECAST AREA WEDNESDAY NIGHT AND THURSDAY...WITH CHANCES OF SHOWERS AND THUNDERSTORMS. SO...NO MAJOR CHANGES TO THE EXTENDED AT THIS TIME. BYRD && .AVIATION... /1127 AM CDT MON JUL 26 2010/ VFR CONDITIONS EXPECTED OUTSIDE OF THUNDERSTORMS. SCATTERED THUNDERSTORMS EXPECTED TO DEVELOP ACROSS MISSOURI THIS AFTERNOON AND DIMINISH THIS EVENING. LOCALLY HEAVY RAINFALL AND GUSTY WINDS COULD AFFECT KCOU. SOUTHEAST WIND TO GRADUALLY BECOME SOUTHERLY DURING THE TAF PERIOD. SPECIFICS FOR KSTL...APPEARS BEST CHANCES OF CONVECTION WILL REMAIN WEST OF THE TERMINAL THIS AFTERNOON. WILL CONTINUE TO MONITOR LATEST RADAR TRENDS AND UPDATE FORECAST. OTHERWISE...SCT- BKN DIURNAL CUMULUS EXPECTED WITH A SOUTHEAST WIND BECOMING SOUTH BY TUESDAY MORNING. CVKING && .LSX WATCHES/WARNINGS/ADVISORIES... MO...NONE. IL...NONE. && WFO LSX
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 936 AM CDT MON JUL 26 2010 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-271200- 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 MO- LEWIS MO-SHELBY MO-MARION MO-MONROE MO-RALLS MO-PIKE MO-BOONE MO- AUDRAIN MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-MONTGOMERY MO- LINCOLN MO-GASCONADE MO-WARREN MO-ST. CHARLES MO-FRANKLIN MO- ST. LOUIS MO-ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO- WASHINGTON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO- MADISON MO-REYNOLDS MO- 936 AM CDT MON JUL 26 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON IN MISSOURI. SOME OF THE THUNDERSTORMS COULD BE STRONG AND CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH. LOCALLY HEAVY RAINFALL AND FLASH FLOODING OF LOW LYING AREAS WILL ALSO BE POSSIBLE DUE TO THE SLOW MOVEMENT OF THESE THUNDERSTORMS AND AVAILABLE MOISTURE IN THE ATMOSPHERE. THE THUNDERSTORMS WILL WEAKEN AND DISSIPATE THIS EVENING. MODERATE RIVER FLOODING IS EXPECTED TO CONTINUE FOR MUCH OF THE MISSISSIPPI RIVER AS WELL AS PART OF THE LA MOINE RIVER. SEE THE APPROPRIATE FLOOD STATEMENTS FOR SPECIFIC DETAILS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A CHANCE FOR THUNDERSTORMS TUESDAY...WITH THE GREATEST PROBABILITY ACROSS SOUTHEAST MISSOURI AND SOUTHERN ILLINOIS. THERE IS ANOTHER CHANCE OF THUNDERSTORMS FROM WEDNESDAY NIGHT THROUGH FRIDAY AS A COLD FRONT MOVES SLOWLY ACROSS THE REGION. HEAT INDEX VALUES OF 100 DEGREES OR GREATER ARE EXPECTED ACROSS THE ENTIRE AREA DURING THE AFTERNOON AND EARLY EVENING HOURS ON WEDNESDAY. HEAT INDEX VALUES AROUND 100 DEGREES ARE POSSIBLE ACROSS PORTIONS OF SOUTHEAST MISSOURI AND SOUTHWEST ILLINOIS ON THURSDAY AFTERNOON. MODERATE RIVER FLOODING IS EXPECTED TO CONTINUE FOR MUCH OF THE MISSISSIPPI RIVER AS WELL AS PART OF THE LA MOINE RIVER. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ASKED TO RELAY ANY SEVERE WEATHER AND FLOODING REPORTS TO THE NATIONAL WEATHER SERVICE IN ST. LOUIS. && FOR A GRAPHICAL VERSION OF THIS INFORMATION SEE OUR WEBPAGE AT (LOWERCASE)... HTTP://WWW.WEATHER.GOV/LSX/?N=HWO1 CVKING
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
132 PM CDT MON JUL 26 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0131 PM FLASH FLOOD WESTPHALIA 38.44N 92.00W
07/26/2010 OSAGE MO LAW ENFORCEMENT
MISSOURI TROOP F REPORTS 2 FEET OF WATER COVERING PART
OF HIGHWAY 63
&&
FGLASSSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 231 PM CDT MON JUL 26 2010 MOZ041-047-262045- BOONE MO-MONITEAU MO- 231 PM CDT MON JUL 26 2010 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL BOONE AND NORTHEASTERN MONITEAU COUNTIES UNTIL 345 PM CDT... AT 225 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 9 MILES NORTHWEST OF JAMESTOWN...OR 11 MILES SOUTHEAST OF BOONVILLE...MOVING EAST AT 15 MPH. WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. THIS STORM WILL BE NEAR... LUPUS AROUND 250 PM CDT. MCBAINE AROUND 255 PM CDT. EASLEY AROUND 305 PM CDT. COLUMBIA AROUND 325 PM CDT. THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. CVKING
The St Louis radar (KLSX), 155 km away, was scanning. The volume nearest the first event began at 20:20 UTC.
3 flash flood. Local standard time, as filed.
Up to three inches of rain fell in a short amount of time causing flash flooding. Numerous roads were flooded including U.S. Highway 50 just west of Tipton with up to a foot of water flowing over it in this location.
Up to three inches of rain fell in a short amount of time causing flash flooding. Numerous road were flooded including streets in Laddonia, Route J just northeast of Mexico, and Routes AA and KK near Laddonia.
Up to three inches of rain fell in a short amount of time causing flash flooding. Several roads were flooded including low water crossing throughout the county. Also, about 8 mobile homes in Bannister City on Highway 8 were evacuated after becoming surrounded by flood waters.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2010Every state in 2010This day in weather historyWarnings in Missouri, July 2010
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: 253802, 253803, 253805.