Slow moving thunderstorms developed on nose of low level jet and persisted for several hours over east central Missouri. Up to five inches of rain fell in a very short amount of time 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.
Slow moving thunderstorms developed on nose of low level jet and persisted for several hours over east central Missouri. Up to five inches of rain fell in a very short amount of time 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 10, 6:21 AM CST, 9 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED AVIATION NATIONAL WEATHER SERVICE ST LOUIS MO 721 AM CDT WED JUL 10 2013 .UPDATE... ISSUED AT 633 AM CDT WED JUL 10 2013 UPDATED GRIDS AND PRODUCTS TO RAISE POPS OVER AREAS WHERE CONVECTION HAS BLOSSOMED THIS MORNING. KANOFSKY && .SHORT TERM...(THROUGH LATE THIS AFTERNOON) ISSUED AT 311 AM CDT WED JUL 10 2013 CONVECTION TRENDS OVERNIGHT HAVE BEEN A BIT INCOHERENT TO SAY THE LEAST...BUT REGIONAL RADAR IMAGERY OVER THE LAST 90 MINUTES SEEM TO SUGGEST THAT VEERING LOW LEVEL JET AND ASSOCIATED WARM ADVECTION FROM W MO INTO S IL WILL BE THE MAIN DRIVING MECHANISM FOR THUNDERSTORMS EARLY TODAY. OVER THE LAST 30 MINUTES THERE HAS BEEN A RAPID INCREASE IN COVERAGE OVER N OZARKS...AND IT APPEARS THIS IS TRYING TO "CONNECT" WITH SPOTTIER STORMS THAT DEVELOPED NW OF STL SHORTLY AFTER 06Z. THIS ENTIRE AREA SHOULD SHIFT SOUTH WITH THE VEERING LOW LEVEL JET AS THE MORNING PROGRESSES. MEANWHILE... LINGERING CONVECTION OVER NW MO/SE NE CERTAINLY INDICATES THAT SOME THUNDERSTORM THREAT WILL ALSO CONTINUE NEAR THE APPROACHING COLD FRONT AT LEAST FOR A FEW HOURS THIS MORNING. THE EXACT EVOLUTION OF THE PRECIPITATION THIS MORNING WILL HAVE A MAJOR IMPACT ON TIMING AND LOCATION OF ADDITIONAL THUNDERSTORM ACTIVITY AND SEVERE WEATHER POTENTIAL THIS AFTERNOON....BUT FOR NOW HAVE MAINTAINED HIGH CHANCE POPS FOR AREAS SE OF STL. AM A BIT CONCERNED THAT THIS MORNINGS ACTIVITY MAY SET UP THE PRIMARY FOCUS FOR ADDITIONAL CONVECTION OVER FAR S SECTIONS OF OUR CWA...AND IN ADDITION STRONG W COMPONENT TO SURFACE/LOW LEVEL FLOW S OF THE COLD FRONT SHOULD CERTAINLY LIMIT CONVERGENCE ALONG THE ACTUAL FRONTAL BOUNDARY. HOWEVER...AMS WILL CERTAINLY REMAIN QUITE UNSTABLE WITH MUCAPES OF 3000-4000 J/KG...AND ALL SYNOPTIC MODELS ARE SUGGESTING NW FLOW WILL ALLOW SUBTLE SHORTWAVE ENERGY TO PROPAGATE INTO THE AREA...SO WILL NOT TOTALLY GIVE UP PRECIP CHANCES ALONG THE ACTUAL COLD FRONT EVEN IF MORE SIGNIFICANT BOUNDARY ENDS UP WELL SOUTH. NO MAJOR CHANGES TO GOING TEMPS...MU80S IN OUR NW COUNTIES TO THE LM90S IN OUR SE...WHERE HEAT INDEX VALUES WILL ONCE AGAIN PUSH THE CENTURY MARK. HOWEVER...CLOUDS AND PRECIP SHOULD KEEP HI FROM REACHING ADVISORY CRITERIA. TRUETT .LONG TERM...(TONIGHT THROUGH TUESDAY) ISSUED AT 311 AM CDT WED JUL 10 2013 TONIGHT...SCT TSRA ALONG A CDFNT SHOULD DIMINISH WITH TIME THIS EVENING AS THE BDRY MOVES THROUGH THE AREA AND EVENTUALLY STALLS IN AR. THU THROUGH SAT...A COOLER AND DRIER AIR MASS WILL SPREAD ACROSS MO/IL BEHIND THE AFOREMENTIONED CDFNT...BRINGING A SHORT BREAK FROM THE RECENT HOT AND HUMID CONDITIONS. COOLER AND DRIER WX WILL PERSIST UNTIL THE SFC HIGH OVER IA/WI/IL SHIFTS EWD AND THE STRONG UPPER RIDGE OVER THE SWRN CONUS BUILDS INTO THE CENTRAL PLAINS. SUN THROUGH TUE...A 594+ DAM H5 PRESSURE CENTER IS FCST TO BE LOCATED OVER THE CENTER OF THE COUNTRY BY EARLY NEXT WEEK. THIS WILL BRING A RETURN OF HOT WEATHER TO THE AREA WITH LIMITED OPPORTUNITIES FOR PCPN. MODELS ARE FCSTG A BROAD AREA OF FAIRLY WEAK VORTICITY TO BREAK OFF FROM THE ERN CONUS TROF AND THEN MOVE WWD ACROSS THE SRN CONUS ON THE SOUTH SIDE OF THE HIGH. DEPENDING ON THE DETAILS...THIS FEATURE COULD PROVIDE JUST ENOUGH SUPPORT FOR ISO-SCT PCPN ACROSS THE SRN CWA. AS HAS BEEN THE CASE FOR THE LAST SEVERAL DAYS...MODELS CONTINUE TO SHOW A CLOSED LOW DVLPG SOMEWHERE ALONG THE APPALACHIANS...BUT THERE HAS BEEN LITTLE RUN TO RUN CONSISTENCY SO FAR. KANOFSKY && .AVIATION...(FOR THE 12Z TAFS THROUGH 12Z THURSDAY MORNING) ISSUED AT 658 AM CDT WED JUL 10 2013 COVERAGE OF ELEVATED CONVECTION HAS RAPIDLY INCREASED OVER THE LAST FEW HOURS...BUT STILL EXPECTING THIS ACTIVITY TO SHIFT TO THE SE DURING THE MORNING. APPROXIMATE BACK EDGE OF THE PRECIP IS NEAR A BOONEVILLE...UIN LINE...SO WHILE COU WILL BE OUT OF THE THUNDER THREAT SHORTLY STL AREA TAFS WILL REMAIN WITH TEMPOS FOR TSRA UNTIL LATE MORNING. PREVAILING CONDITIONS WILL BE VFR CIGS AOA 5KFT...BUT WITH THE HIT AND MISS STRONG CORES VSBYS WILL CERTAINLY DROP TO IFR...WITH CIGS AT LEAST DIPPING INTO THE MVFR RANGE. WILL BE WATCHING RADAR TRENDS TO DETERMINE IF AMENDMENTS WILL BE NECESSARY FOR THESE LOWER CONDITIONS. STILL UNCERTAIN HOW ANY ADDITIONAL ACTIVITY WILL EVOLVE BY THIS AFTERNOON...BUT IN SPITE OF WEAKENING CONVERGENCE ALONG FRONT AND WITH BOUNDARY FROM THIS MORNINGS ACTIVITY SETTING UP S OF OUR CWA...THINK THAT REDEVELOPMENT MAY STILL OCCUR NEAR THE SYNOPTIC FRONT DUE TO RESIDUAL INSTABILITY AND WEAK UPPER LEVEL DYNAMICS DIPPING INTO THE AREA. SO...FOLLOWING THE LEAD OF THE LATEST HRRR DATA WILL REINTRODUCE VCTS IN STL FOR A BRIEF PERIOD EARLY THIS AFTERNOON...BEFORE FROPA PUSHES ACTIVITY S INTO SE MO/S IL. TRANQUIL CONDITIONS SHOULD PREVAIL THROUGHOUT THE AREA THIS EVENING...WITH CLEAR SKIES AND NORTH WINDS AOB 10 KTS. SPECIFICS FOR KSTL... BASED ON ABOVE REASONING WILL BE CARRYING TEMPO TSRA THROUGH 15Z WITH VFR CIGS AND MVFR VSBYS....BUT AS MENTIONED WILL BE WATCHING RADAR TRENDS TO DETERMINE IF MORE INTENSE CORES WILL IMPACT THE TERMINAL AREA. PRECIP THREAT SHOULD BRIEFLY LULL BEFORE REINTRODUCTION OF TSRA AS FRONTAL BOUNDARY MOVES THROUGH IN THE 18-20Z TIME FRAME...BUT AFTER 20Z FRONT SHOULD BE FAR ENOUGH SOUTH THAT THREAT WILL END. LATE AFTERNOON AND INTO THE EVENING SHOULD GENERALLY BE CLEAR/VFR...WITH LIGHT NORTH WINDS 5-10KTS. TRUETT && .LSX WATCHES/WARNINGS/ADVISORIES... MO...NONE. IL...NONE. && WFO LSX
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 359 AM CDT WED JUL 10 2013 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-110900- 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- 359 AM CDT WED JUL 10 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED TODAY. A FEW OF THE STORMS ACROSS SOUTHEAST MISSOURI AND SOUTHWEST ILLINOIS COULD BE STRONG TO SEVERE AND CAPABLE OF PRODUCING DAMAGING WINDS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON ACROSS PORTIONS OF SOUTHEAST MISSOURI AND SOUTHWEST ILLINOIS. KANOFSKY
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 554 AM CDT WED JUL 10 2013 ILZ100-101-MOZ063-064-101145- MADISON IL-ST. CLAIR IL-ST. LOUIS MO-ST. LOUIS CITY MO- 554 AM CDT WED JUL 10 2013 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN ST. LOUIS CITY... NORTHEASTERN ST. LOUIS...NORTHWESTERN ST. CLAIR AND SOUTHWESTERN MADISON COUNTIES UNTIL 645 AM CDT... AT 551 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR RIVERVIEW...MOVING SOUTHEAST AT 15 MPH. HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... NORTH ST LOUIS CITY... GRANITE CITY... VENICE... MADISON... PONTOON BEACH... EAST ST. LOUIS... WASHINGTON PARK... COLLINSVILLE... CASEYVILLE... FAIRVIEW HEIGHTS... CENTREVILLE... 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. TRUETT
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
647 AM CDT WED JUL 10 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0613 AM HAIL BRIDGETON 38.77N 90.43W
07/10/2013 E0.25 INCH ST. LOUIS MO TRAINED SPOTTER
&&
GOSSELINPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
729 AM CDT WED JUL 10 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0720 AM FLOOD 3 SSW LESLIE 38.38N 91.25W
07/10/2013 FRANKLIN MO LAW ENFORCEMENT
PUBLIC REPORT OF WATER OVER HIGHWAY CC. DEPTH
UNKNOWN....BUT HIGHWAY STILL OPEN AT THIS TIME.
&&
TILLYThe St Louis radar (KLSX), 80 km away, was scanning. The volume nearest the first event began at 12:29 UTC.
1 flash flood. Local standard time, as filed.
Up to five inches of rain fell in a short amount of time causing flash flooding. Numerous roads within Meramec State Park were closed due to flash flooding. Also, several roads in the New Haven and Washington areas were closed due to flash flooding.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2013Every state in 2013This day in weather historyWarnings in Missouri, July 2013
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: 470282.