A warm and moist air mass was in place across the region during the afternoon hours. Temperatures were in the upper 80s to lower 90s with dewpoints in the low to middle 70s.
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 ILN wrote it up.
A warm and moist air mass was in place across the region during the afternoon hours. Temperatures were in the upper 80s to lower 90s with dewpoints in the low to middle 70s. A weak mid level short wave combined with residual boundaries allowed for scattered thunderstorm development through the mid afternoon hours. These thunderstorms continued into the early evening hours.
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 14, 2:47 PM EST, 2 hours 13 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
347 PM EDT SAT AUG 14 2010
.SYNOPSIS...
CONTINUED WARM AND VERY HUMID CONDITIONS AHEAD OF A COLD FRONT SET
TO MOVE THROUGH THE AREA ON SUNDAY EVENING. IN ADVANCE OF THE
FRONT...SEVERAL WEAK WEATHER SYSTEMS WILL SERVE TO SET OFF SHOWERS
AND THUNDERSTORMS THROUGH THE REMAINDER OF THE WEEKEND. SOMEWHAT
COOLER...BUT DEFINITELY DRIER AIR WILL SLIDE INTO THE GREAT LAKES
THROUGH EARLY NEXT WEEK IN THE WAKE OF THE FRONT.
&&
.NEAR TERM /THROUGH TONIGHT/...
WILL CONTINUE WITH HEAT ADVISORIES MOST AREAS...BUT MAY CANCEL
SOME NORTHERN COUNTIES WITH STORMS MOVING THROUGH THE AREA.
FORECAST FILLED WITH COMPLEXITIES GIVEN OVERALL WEAK SYNOPTIC
FORCING AND ILL-DEFINED BOUNDARIES...WHICH TO CONTINUE TO BE
MODULATED BY STRONG THUNDERSTORMS. AMBIENT AIRMASS CONTINUES TO BE
VERY UNSTABLE...WITH MID 70S DEWPOINTS ALLOWING MLCAPES IN EXCESS
OF 2000 J/KG DESPITE EXTREMELY POOR MID TROPOSPHERIC LAPSE RATES.
PRECIPITABLE WATERS AROUND 1.75 INCHES ISN/T OFF THE CHARTS...BUT
STILL SUPPORTIVE OF TREMENDOUS RAINFALL RATES WITH STORMS MOVING
THROUGH THE AREA THIS AFTERNOON. DEEP LAYER FLOW CONTINUES TO BE
WEAK TODAY/TONIGHT AS MID LEVEL RIDGE TO OUR SOUTH STILL
DOMINATES...BUT VERY STRONG LOW NEAR LAKE WINNIPEG MANITOBA WILL
CHANGE THAT AS IT SLIDES EAST THROUGH SOUTHERN CANADA.
FORECAST PROBLEM LATE THIS AFTN/TONIGHT IS VERY WELL DEFINED MCV
/MESOSCALE CONVECTIVE VORTEX/ NEAR CHICAGO AND THIS HAS BEEN
INITIALIZED WELL BY RUC RUNS TODAY. THIS FEATURE SHOULD MOVE DUE
EAST ACROSS NRN IND/OH THIS EVENING AND MAY CONTINUE TO SUPPORT
FURTHER DEVELOPMENT OF ORGANIZED STORM CLUSTERS ACROSS INDIANA AND
OHIO DESPITE EXTREMELY WEAK LOWER TROPOSPHERIC/BOUNDARY LAYER
FLOW. WILL CONTINUE TO EMPHASIZE HIGHER RAIN CHANCES ACROSS THE
NORTH WITH THIS SYSTEM BUT THIS COULD CHANGE GIVEN VERY UNSTABLE
AIRMASS...AND NOW NUMEROUS OUTFLOWS SURGING AROUND THE AREA. IN
FACT KILN WSR-88D THIS AFTERNOON SHOWING NUMEROUS WAYWARD
PROPAGATING OUTFLOWS AROUND CURRENT TSRA COMPLEXES...ANY OF WHICH
MAY INSTIGATE DEEP CONVECTION.
SEVERE THREAT OVERALL IS SMALL...BUT THINK THERE WILL PROBABLY BE
A FEW REPORTS OF STRONG/DAMAGING WIND GIVEN HIGH DOWNDRAFT CAPE
PER MESOSCALE ANALYSIS /1300 J/KG OVER CNTL OH/ AND COLLAPSE OF
THE STRONGEST CORES...OR BRIEFLY ORGANIZING LINE SEGMENTS.
ORIENTATION OF LOW LEVEL SHEAR VECTOR AND MAGNITUDE NOT OVERLY
CONDUCIVE TO COLD POOL DOMINATED LINE SEGMENTS...AND THIS
CONFIRMED ON RADAR SO FAR TODAY WITH OUTFLOW QUICKLY SURGING OUT
AHEAD OF STORMS.
BIGGER CONCERN WITH THESE MCV/S AT NIGHT BECOMES HEAVY RAIN IN THE
SOUTHEAST QUADRANT OF THE ADVANCING CIRCULATION WHERE WEAK LOW
LEVEL JET CAN ALLOW FOR BACKWARD PROPAGATING/REGENERATIVE MCS.
THERE HAS BEEN A SIGNAL FOR THIS IN SOME OF THE RECENT NAM-WRF
RUNS BUT LOCATION HAS BEEN DIFFERENT...SO WILL MONITOR THIS.
ANOTHER WARM MUGGY NIGHT...AND RELIED ON LOW TEMP NUMBERS VERY
CLOSE TO METMOS...WITH CONTRIBUTION FROM BIAS-CORRECTED 2M SREF TEMPS.
&&
.SHORT TERM /SUNDAY THROUGH SUNDAY NIGHT/...
STILL A COMPLEX FORECAST SUNDAY AND THIS HIGHLY DEPENDENT ON HOW
BOUNDARIES TONIGHT CONTINUE TO BE LAID DOWN. THE STRONG
MCV/CIRCULATION FROM TONIGHT SHOULD BE DEPARTING IN THE MORNING
AND MAY BRING A PERIOD OF SUBSIDENCE IN IT/S WAKE...BUT THERE ARE
A WIDE RANGE OF SOLUTIONS ON CONVECTIVE DEVELOPMENT AS THE DAY
WEARS ON. THERE IS NO DOUBT THE MID/UPPER LEVEL FLOW WILL BE ON
THE INCREASE AS THE SRN CANADA VORTEX SWINGS EAST INTO THE
NORTHERN GREAT LAKES...SO THE THREAT FOR ORGANIZED SEVERE STORMS
IS HIGHER TOMORROW THAN TODAY. IT WILL CONTINUE TO BE VERY HUMID
WITH DEWPOINTS IN THE 70S...SO ATMOSPHERE WILL EASILY BECOME
UNSTABLE WITH ANY HEATING. RIGHT NOW THERE IS A LACK OF STRONGER
FORCING...BUT A VERY WEAK MID LEVEL SHORTWAVE DOES SHIFT ACROSS
THE AREA DURING THE LATE MORNING/EARLY AFTERNOON. THIS WILL LIKELY
AID IN EXPANDING TSRA CLUSTERS AGAIN. SEE STORM PREDICTION CENTERS
SWODY2 /DAY 2 OUTLOOK/ REGARDING THE COMPLEXITIES AND FURTHER
DETAILS ON THE STORM THREAT. CONTINUED WITH HIGH CHANCE AND LIKELY
WORDING ON SUNDAY IN THE FORECAST....WITH A DIMINISHING TREND
DURING THE EVENING BOTH WITH THE LOSS OF HEATING BUT ALSO AS
BOUNDARY LAYER BEGINS TO DRY OUT IN WAKE OF WEAK WIND SHIFT
PASSING THROUGH THE AREA.
MAY NEED YET ANOTHER HEAT ADVISORY TOMORROW BUT WILL LET MIDNIGHT
SHIFT SEE WHERE BOUNDARIES LAY OUT AND SEE IF THEY CAN GET A
BETTER FEEL FOR DAYTIME CONVECTION ON WHERE APPROPRIATE PLACEMENT
SHOULD BE.
&&
.LONG TERM /MONDAY THROUGH SATURDAY/...
FRONT MAY STILL BE LINGERING NEAR THE SOUTHEAST ZONES ON MONDAY. SO
HAVE HELD ON TO SLIGHT CHANCE POPS. THEN HIGH PRESSURE WILL BUILD IN
FOR MIDWEEK. CANNOT COMPLETELY PRECLUDE THE CHANCE OF PRECIPITATION
AS MID LEVEL DISTURBANCE MOVE THROUGH ON WEDNESDAY. BUT MORE
SUBSTANTIAL CHANCE OF SHOWERS AND THUNDERSTORMS WILL HOLD OF UNTIL
THE END OF THE WEEK WHEN A FRONT SAGS TOWARDS THE AREA AND ANOTHER
SHORT WAVE APPROACHES.
ABOVE NORMAL TEMPERATURES WILL PERSIST. HOWEVER A SOMEWHAT DRIER
AIRMASS WILL TEMPORARILY SPREAD IN ON TUESDAY AND WEDNESDAY.
&&
.AVIATION /20Z SATURDAY THROUGH THURSDAY/...
CONDITIONS ARE MAINLY VFR THROUGH PERIOD EXCEPT FOR ANY CONVECTION
THAT WOULD LOWER CIGS AND VSBYS FOR BRIEF PERIOD. BEST CONVECTIVE
POTENTIAL APPEARS TO BE THROUGH EARLY EVENING AND THEN AGAIN JUST
BEFORE SUNRISE. LIGHT WINDS EXCEPT FOR ANY TSRA WIND GUSTS. SOME
FOG POSSIBLE NEAR SUNRISE ESPECIALLY AT LUK DEPENDING ON AMOUNTS
OF SHRA/TSRA.
OUTLOOK...NO SIGNIFICANT WEATHER EXPECTED.
&&
.ILN WATCHES/WARNINGS/ADVISORIES...
OH...HEAT ADVISORY UNTIL 8 PM EDT THIS EVENING FOR OHZ073-077>082-
088.
KY...HEAT ADVISORY UNTIL 8 PM EDT THIS EVENING FOR KYZ089>100.
IN...HEAT ADVISORY UNTIL 8 PM EDT THIS EVENING FOR INZ073>075-080.
&&
SYNOPSIS...BINAU
NEAR TERM...BINAU
SHORT TERM...BINAU
LONG TERM...
AVIATION...PADGETTHAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE WILMINGTON OH 433 PM EDT SAT AUG 14 2010 INZ050-058-059-066-OHZ026-034-035-042>046-051>053-060-061-070-152045- WAYNE-FAYETTE IN-UNION IN-FRANKLIN IN-HARDIN-MERCER-AUGLAIZE-DARKE- SHELBY-LOGAN-UNION OH-DELAWARE-MIAMI-CHAMPAIGN-CLARK-PREBLE- MONTGOMERY-BUTLER- 433 PM EDT SAT AUG 14 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL INDIANA...SOUTHEAST INDIANA...CENTRAL OHIO...MIAMI VALLEY OF OHIO...SOUTHWEST OHIO AND WEST CENTRAL OHIO. .DAY ONE...TONIGHT. THUNDERSTORMS WILL BE POSSIBLE ACROSS THE AREA THROUGH TONIGHT. A FEW OF THE STORMS COULD BE STRONG TO SEVERE...WITH GUSTY WINDS AND TORRENTIAL RAINFALL RATES THAT MAY CAUSE SOME LOCALIZED FLOODING. THE THREAT FOR SEVERE STORMS WILL QUICKLY DIMINISH AFTER SUNSET. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. A SLOW MOVING COLD FRONT CROSSING THE AREA WILL PRODUCE THE THREAT OF THUNDERSTORMS THROUGH SUNDAY EVENING. SOME OF THE THE STORMS WILL CONTAIN HEAVY RAIN ALONG WITH GUSTY WINDS. LOCALIZED FLOODING WILL BE POSSIBLE. A SLIGHT RISK OF SEVERE WEATHER IS ALSO POSSIBLE SUNDAY AFTERNOON. THE MAIN THREAT WILL BE DAMAGING WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING AND TOMORROW. INZ073-152045- RIPLEY- 433 PM EDT SAT AUG 14 2010 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST INDIANA. .DAY ONE...TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. HEAT ADVISORY. THUNDERSTORMS WILL BE POSSIBLE ACROSS THE AREA THROUGH TONIGHT. A FEW OF THE STORMS COULD BE STRONG TO SEVERE...WITH GUSTY WINDS AND TORRENTIAL RAINFALL RATES THAT MAY CAUSE SOME LOCALIZED FLOODING. THE THREAT FOR SEVERE STORMS WILL QUICKLY DIMINISH AFTER SUNSET. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. A SLOW MOVING COLD FRONT CROSSING THE AREA WILL PRODUCE THE THREAT OF THUNDERSTORMS THROUGH SUNDAY EVENING. SOME OF THE THE STORMS WILL CONTAIN HEAVY RAIN ALONG WITH GUSTY WINDS. LOCALIZED FLOODING WILL BE POSSIBLE. A SLIGHT RISK OF SEVERE WEATHER IS ALSO POSSIBLE SUNDAY AFTERNOON. THE MAIN THREAT WILL BE DAMAGING WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. INZ074-075-080-KYZ089>100-OHZ073-077>082-088-152045- DEARBORN-OHIO-SWITZERLAND-CARROLL-GALLATIN-BOONE-KENTON-CAMPBELL- OWEN-GRANT-PENDLETON-BRACKEN-ROBERTSON-MASON-LEWIS-ROSS-HAMILTON- CLERMONT-BROWN-HIGHLAND-ADAMS-PIKE-SCIOTO- 433 PM EDT SAT AUG 14 2010 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...SEVERE THUNDERSTORM WATCH 614 IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST INDIANA...NORTHEAST KENTUCKY...NORTHERN KENTUCKY...CENTRAL OHIO...SOUTH CENTRAL OHIO AND SOUTHWEST OHIO. .DAY ONE...TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. HEAT ADVISORY. SEVERE THUNDERSTORM WATCH. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. A SLOW MOVING COLD FRONT CROSSING THE AREA WILL PRODUCE THE THREAT OF THUNDERSTORMS THROUGH SUNDAY EVENING. SOME OF THE THE STORMS WILL CONTAIN HEAVY RAIN ALONG WITH GUSTY WINDS. LOCALIZED FLOODING WILL BE POSSIBLE. A SLIGHT RISK OF SEVERE WEATHER IS ALSO POSSIBLE SUNDAY AFTERNOON. THE MAIN THREAT WILL BE DAMAGING WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL LIKELY BE NEEDED. OHZ054>056-062>065-071-072-074-152045- MADISON-FRANKLIN OH-LICKING-GREENE-FAYETTE OH-PICKAWAY-FAIRFIELD- WARREN-CLINTON-HOCKING- 433 PM EDT SAT AUG 14 2010 ...SEVERE THUNDERSTORM WATCH 614 IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL OHIO...MIAMI VALLEY OF OHIO AND SOUTHWEST OHIO. .DAY ONE...TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. A SLOW MOVING COLD FRONT CROSSING THE AREA WILL PRODUCE THE THREAT OF THUNDERSTORMS THROUGH SUNDAY EVENING. SOME OF THE THE STORMS WILL CONTAIN HEAVY RAIN ALONG WITH GUSTY WINDS. LOCALIZED FLOODING WILL BE POSSIBLE. A SLIGHT RISK OF SEVERE WEATHER IS ALSO POSSIBLE SUNDAY AFTERNOON. THE MAIN THREAT WILL BE DAMAGING WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL LIKELY BE NEEDED. BINAU
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
358 PM EDT SAT AUG 14 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0345 PM TSTM WND GST HARVEYSBURG 39.50N 84.00W
08/14/2010 E60 MPH WARREN OH TRAINED SPOTTER
0345 PM TSTM WND DMG HARVEYSBURG 39.50N 84.00W
08/14/2010 WARREN OH PUBLIC
NUMEROUS LARGE BRANCHES DOWN
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
445 PM EDT SAT AUG 14 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0338 PM TSTM WND DMG 3 E LEBANON 39.43N 84.16W
08/14/2010 WARREN OH NWS EMPLOYEE
LARGE BRANCHES DOWN ON HWY 350 NORTH OF HIGHWAY 123 BY
OFF DUTY NWS EMPLOYEE. TIME ESTIMATED.
&&
BINAUPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
526 PM EDT SAT AUG 14 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0526 PM TSTM WND GST GREENVILLE 40.10N 84.62W
08/14/2010 E45 MPH DARKE OH TRAINED SPOTTER
ESTIMATED 45-50 MPH WINDS.
&&
BINAUPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
527 PM EDT SAT AUG 14 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0526 PM HEAVY RAIN MOUNT STERLING 39.72N 83.27W
08/14/2010 M1.85 INCH MADISON OH TRAINED SPOTTER
IN AN HOUR AND 25 MINUTES.
&&
BINAUPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
530 PM EDT SAT AUG 14 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0433 PM TSTM WND DMG ROSS 39.31N 84.65W
08/14/2010 BUTLER OH LAW ENFORCEMENT
LARGE BRANCHES DOWN. TIME ESTIMATED. DELAYED REPORT.
&&
BINAUPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
556 PM EDT SAT AUG 14 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0555 PM TSTM WND DMG 1 E WATERLOO 38.97N 84.77W
08/14/2010 BOONE KY TRAINED SPOTTER
TREE DOWN.
&&
BINAUThe Cincinnati radar (KILN), 89 km away, was scanning. The volume nearest the first event began at 22:01 UTC.
2 thunderstorm wind, 1 flash flood. Local standard time, as filed.
Power poles were reported down due to damaging thunderstorm winds.
Several trees were reported down countywide due to damaging thunderstorm winds.
Water was reported to be rushing across roads due to heavy rainfall. There was also some flooding of underpasses. One rainfall measurement was of 5.64 inches of precipitation.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Kentucky in 2010Every state in 2010This day in weather historyWarnings in Kentucky, August 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: 245590, 245591, 245594.