A cold front helped to produce numerous thunderstorms during the evening across northern Kentucky. Some storms moved over the same areas as previous storms, causing 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 cold front helped to produce numerous thunderstorms during the evening across northern Kentucky. Some storms moved over the same areas as previous storms, causing 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 Aug 5, 6:41 PM EST, 1 hour 39 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE WILMINGTON OH 741 PM EDT SUN AUG 5 2012 .SYNOPSIS... A COLD FRONT WILL PUSH SOUTHEAST OF THE AREA BY MONDAY MORNING. MORE SEASONABLE TEMPERATURES AND DRY CONDITIONS WILL FILTER IN BEHIND THE FRONT FOR THE FIRST PART OF THE WORK WEEK. A TROUGH OF LOW PRESSURE WILL BRING A GOOD CHANCE FOR THUNDERSTORMS LATER IN THE WEEK. && .NEAR TERM /UNTIL 6 AM MONDAY MORNING/... COLD FRONT IS ENTERING THE WESTERN PART OF THE FA. NUMEROUS THUNDERSTORMS WILL PERSIST IN SOUTHEASTERN COUNTIES FOR A COUPLE MORE HOURS UNTIL THE FRONT MOVES EAST AND INSTABILITY DROPS OFF WITH A DRIER AND COOLER AIRMASS WORKING IN AND WITH LOSS OF DAYTIME HEATING. SKIES WILL CLEAR DURING THE OVERNIGHT HOURS AS DRIER AIR CONTINUES TO FILTER IN BEHIND THE FRONT. TEMPERATURES WILL FALL OFF INTO THE LOW TO MID 60S...WITH SOME 50S IN NORTHWESTERN LOCATIONS. && .SHORT TERM /6 AM MONDAY MORNING THROUGH MONDAY NIGHT/... SURFACE HIGH PRESSURE AND DRY AIR WILL MOVE IN ON A WEST NORTHWESTERLY FLOW ALOFT. WENT CLOSER TO ECMWF AND GFS SOLUTION WHICH PUSHES THE FRONT FARTHER SOUTHEAST. THIS SCENARIO SUGGESTS TEMPERATURES IN THE 80S FOR HIGHS...WHILE THE OUTLIER NAM SOLUTION HOLDS UP THE FRONT AND KEEPS TEMPERATURES UP AROUND 90. CLEAR SKIES ARE EXPECTED MONDAY NIGHT WITH LOWS AROUND 60. && .LONG TERM /TUESDAY THROUGH SUNDAY/... IN NORTHWEST FLOW PATTERN...SURFACE HIGH PRESSURE TO BUILD INTO THE REGION DOMINATING THE WEATHER THROUGH MID WEEK. THIS HIGH WILL PROVIDE DRY WEATHER AND COOLER TEMPERATURES. EXPECT TEMPERATURES TO BE NEAR OR A LTL ABOVE SEASONABLE NORMAL VALUES WED/THU. NUMERICAL MODELS GENERALLY SIMILAR WITH UPPER LEVEL RIDGE PERSISTING OVER THE WESTERN US AND ENERGY DROPPING SE FROM S CNTRL CANADA CARVING OUT A TROF OVER THE GREAT LAKE BY LATE IN THE WEEK. HAVE FAVORED A SOLN TOWARD A BLEND OF ECMWF AND CMC. WILL INTRODUCE CHC POPS FOR SHOWERS AND THUNDERSTORMS ON THURSDAY AHD OF APPROACHING SFC WAVE WITH AN ENHANCED THREAT ON FRIDAY WHEN FROPA IS EXPECTED TO PASS THRU THE OHIO VALLEY. WITH UPPER LEVEL LOW SHIFTING EAST WILL DRY OUT FROM SW TO NE LATE FRIDAY NIGHT. SOME QUESTION EXISTS REGARDING ADDITIONAL S/W ENERGY IN THE NW FLOW PROVIDING A LOW CHC FOR PRECIP SUNDAY...WITH CONSIDERABLE SPREAD AND A WEAKER SIGNAL WILL CONTINUE DRY FCST. EXPECT TEMPS A LTL BELOW NORMAL SAT/SUN DUE TO CLOUDS/PRECIP AND COLDER TEMPS ALOFT. && .AVIATION /00Z MONDAY THROUGH FRIDAY/... THE THREAT FOR PRECIPITATION HAS ENDED AT ALL THE TAF SITES...AND WINDS HAVE SHIFTED TO THE WEST OR NORTHWEST. OVER THE NEXT FEW HOURS...THE COLD FRONT WILL CLEAR THROUGH THE TAF SITES...SWITCHING WINDS TO THE NORTH. AS THIS OCCURS...DRIER AIR WILL BE MOVING INTO THE REGION...REMOVING THE LOW CLOUDS STILL AROUND. THIS SHOULD ALSO ACT TO INHIBIT WIDESPREAD FOG DEVELOPMENT. SOME MINOR VISIBILITY RESTRICTIONS...AND POSSIBLY MVFR...WILL BE POSSIBLE (WITH THE AMOUNT OF EXPECTED COOLING). HOWEVER...CONFIDENCE IS LOW IN THIS OCCURRING (ASIDE FROM KLUK...WHERE IFR IS BEING FORECAST WITH CALM WINDS). VERY TRANQUIL CONDITIONS ARE EXPECTED ON MONDAY...WITH LIGHT NORTHERLY WINDS AND CLEAR TO MOSTLY CLEAR SKIES. .OUTLOOK...THUNDERSTORMS ARE POSSIBLE ON THURSDAY AND FRIDAY. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...NONE. KY...NONE. IN...NONE. && SYNOPSIS...CONIGLIO NEAR TERM...CONIGLIO SHORT TERM...CONIGLIO LONG TERM...AR AVIATION...HATZOS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE WILMINGTON OH 716 PM EDT SUN AUG 5 2012 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-062330- 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- 716 PM EDT SUN AUG 5 2012 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...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
The Cincinnati radar (KILN), 80 km away, was scanning. The volume nearest the first event began at 01:20 UTC.
3 flash flood. Local standard time, as filed.
Route 1159 was covered by water from a stream being out of its banks due to heavy rainfall.
Holts creek road was impassible south of the AA Highway due to high water over the road caused by heavy rainfall. A house along the road was also flooded.
There were reports of water entering many homes in the Foster Johnsonville area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Kentucky in 2012Every state in 2012This day in weather historyWarnings in Kentucky, August 2012
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: 409446, 409447, 409448.