A complex of showers and thunderstorms moved through the area causing isolated flash flooding to occur.
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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 ILN wrote it up.
A complex of showers and thunderstorms moved through the area causing isolated flash flooding to occur.
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 Wilmington, OH wrote its last area forecast discussion before the first event at Jul 12, 3:54 AM EST, 2 hours 6 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE WILMINGTON OH 454 AM EDT MON JUL 12 2010 .SYNOPSIS... A WAVE OF LOW PRESSURE WILL TRACK THROUGH THE GREAT LAKES TODAY BRINGING THE THREAT OF SHOWERS AND THUNDERSTORMS. AN ASSOCIATED FRONTAL BOUNDARY WILL STALL OUT TO OUR NORTHWEST TONIGHT THROUGH TUESDAY...KEEPING A CHANCE OF THUNDERSTORMS ACROSS THE REGION. TEMPERATURES WILL WARM UP AND RAIN CHANCES WILL END ON WEDNESDAY...AS AN UPPER LEVEL RIDGE BUILDS ACROSS THE OHIO VALLEY. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... ACTIVE WEATHER PATTERN WITH AN INITIAL SHORTWAVE COMING THROUGH OHIO THIS MORNING. WEAK LOW LEVEL JET ALONG WITH ELEVATED INSTBY APPROACHING 1000 J/KG HAS LED TO WIDESPREAD SHOWERS/THUNDERSTORMS ACROSS EASTERN INDIANA AND WEST CENTRAL OHIO. EXPECT THIS COMPLEX TO TRACK ACROSS OHIO THIS MORNING WITH THE BEST COVERAGE ACROSS ILN/S NRN FA. HAVE OPTED FOR CATEGORICAL POPS ACROSS THE NORTH WITH LKLY POPS SOUTH THIS MORNING. AMOUNT OF REDEVELOPMENT THIS AFTN IS UNCERTAIN. IN THE WAKE OF THE MORNING ACTIVITY THE NUMERICAL MODELS ARE DEVELOPING MODERATE INSTBY. HOWEVER...THE BETTER FORCING WL BE OFF TO THE EAST AND DOES NOT LINE UP WITH THIS INSTBY. THEREFORE...HAVE LIMITED AFTN POPS TO CHC CATEGORY. HAVE STAYED CLOSE TO MAV GUID FOR HIGHS TODAY. && .SHORT TERM /6 PM THIS EVENING THROUGH WEDNESDAY/... IN WESTERLY FLOW ALOFT A MEAN TROF AXIS TRANSLATES FROM THE MS VLY TONIGHT INTO THE OHIO VALLEY ON TUESDAY. ANY INSTBY DRIVEN CONVECTION SHUD DIMINISH IN COVERAGE THIS EVENING WITH BOUNDARY DROPPING INTO ILN/S FA OVERNIGHT. HAVE CHC POPS CWA WIDE EARLY AND THEN DIMINISH POPS TO SLIGHT CHC ACRS THE N...WHILE MAINTAINING CHC POPS SOUTH WHERE INSTBY CONTS OVERNIGHT. PREFER TEMPS A LTL ABOVE MAV GUID FOR LOWS TONIGHT. IN RESPONSE TO UPPER LEVEL TROF...ALL NUMERICAL MODEL SOLNS DEVELOP A SFC WAVE WHICH TRACKS THRU THE OHIO VALLEY ON TUESDAY. THIS FORCING COMBINED WITH MODERATE INSTBY WL INCREASE THUNDERSTORM CHANCES. HAVE RAMPED UP TO LKLY POPS ACRS THE SOUTH AND CHC NORTH TUESDAY AFTN. HAVE OPTED A BLEND OF MAV/MET FOR HIGHS TUES...LEANING MORE TOWARD MAV NUMBERS. IN THE WAKE OF THIS MID/UPPER LEVEL TROF...RIDGING BUILDS INTO THE GREAT LAKES/OHIO VALLEY ON WEDNESDAY. NAM SOLN IS OUTLIER HOLDING ONTO PRECIP LONGER WHILE THE GFS/ECMWF BUILD THE RIDGE IN QUICKER. HAVE LIMITED MENTION OF THUNDERSTORMS TO THE SE MAINLY EARLY ON WEDNESDAY. BASED ON 8H TEMPS HAVE WARMED UP HIGHS BUT NOT QUITE AS WARM AS MAV GUID NUMBERS. && .LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/... REGION WILL BE ON THE SOUTHERN EDGE OF THE WESTERLIES THROUGH THE PERIOD. WEAK DISTURBANCES MOVING THROUGH THE FLOW WILL BRING OCCASIONAL CHANCES OF SHOWERS AND THUNDERSTORMS ALTHOUGH TIMING OF THESE IS DIFFICULT AT BEST. A BOUNDARY WILL PUSH SOUTHEAST TOWARDS THE REGION LATER THURSDAY BEFORE WASHING OUT ON FRIDAY. WARM ADVECTION WILL RETURN OVER THE WEEKEND WITH THE POTENTIAL OF ANOTHER BOUNDARY SAGGING SOUTH LATE IN THE PERIOD. ABOVE NORMAL TEMPERATURES WILL CONTINUE THROUGHOUT. && .AVIATION /08Z MONDAY THROUGH FRIDAY/... SCATTERED CONVECTION WILL AFFECT TAF SITES. IT APPEARS MOST THUNDERSTORMS WILL BE NORTH OF TAF SITES FOR THE FIRST FEW HOURS...WITH ASSOCIATED MVFR CONDITIONS EXPANDING TO THE SOUTH AROUND 10Z. A LULL DURING MID MORNING MAY BE FOLLOWED BY MORE CONVECTION DURING THE AFTERNOON. ACTIVITY IS EXPECTED TO DIMINISH ABOUT 01Z WITH LOSS OF DAYTIME HEATING. OUTLOOK...THUNDERSTORMS POSSIBLE THROUGH WEDNESDAY. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...NONE. KY...NONE. IN...NONE. && SYNOPSIS...AR NEAR TERM...AR SHORT TERM...AR LONG TERM... AVIATION...CONIGLIO
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE WILMINGTON OH 522 AM EDT MON JUL 12 2010 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-130930- WAYNE-FAYETTE IN-UNION IN-FRANKLIN IN-RIPLEY-DEARBORN-OHIO- SWITZERLAND-CARROLL-GALLATIN-BOONE-KENTON-CAMPBELL-OWEN-GRANT- PENDLETON-BRACKEN-ROBERTSON-MASON-LEWIS-HARDIN-MERCER-AUGLAIZE-DARKE- SHELBY-LOGAN-UNION OH-DELAWARE-MIAMI-CHAMPAIGN-CLARK-MADISON- FRANKLIN OH-LICKING-PREBLE-MONTGOMERY-GREENE-FAYETTE OH-PICKAWAY- FAIRFIELD-BUTLER-WARREN-CLINTON-ROSS-HOCKING-HAMILTON-CLERMONT-BROWN- HIGHLAND-ADAMS-PIKE-SCIOTO- 522 AM EDT MON JUL 12 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL INDIANA...SOUTHEAST INDIANA...NORTHEAST KENTUCKY...NORTHERN KENTUCKY...CENTRAL OHIO...MIAMI VALLEY OF OHIO...SOUTH CENTRAL OHIO...SOUTHWEST OHIO AND WEST CENTRAL OHIO. .DAY ONE...TODAY AND TONIGHT. A THUNDERSTORM COMPLEX CONTAINING WIDESPREAD COVERAGE OF STORMS WILL TRACK EAST ACROSS THE REGION THIS MORNING. THE MAIN THREAT FROM THIS SYSTEM WILL BE FLOODING FROM HEAVY RAIN. ADDITIONAL SCATTERED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON. THE MAIN THREAT FROM THE AFTERNOON STORMS WILL AGAIN BE HEAVY RAIN. WIDESPREAD SEVERE WEATHER IS NOT ANTICIPATED THIS AFTERNOON...BUT A FEW ISOLATED STORMS COULD REACH SEVERE LIMITS WITH DAMAGING WINDS POSSIBLE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
The Cincinnati radar (KILN), 56 km away, was scanning. The volume nearest the first event began at 10:58 UTC.
1 flash flood. Local standard time, as filed.
Several inches of water was running across roadways due to heavy rainfall.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2010Every state in 2010This day in weather historyWarnings in Ohio, 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: 238234.