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, 12:48 PM EST, 27 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
148 PM EDT SAT AUG 14 2010
.SYNOPSIS...
HOT AND HUMID CONDITIONS WILL CONTINUE THROUGH THE WEEKEND. THE
THREAT FOR THUNDERSTORMS WILL INCREASE EACH DAY AS A COLD FRONT
APPROACHES FROM THE WEST. THIS COLD FRONT WILL MOVE THROUGH THE
REGION SUNDAY NIGHT. HIGH PRESSURE WILL OFFER DRIER CONDITIONS FOR
EARLY NEXT WEEK.
&&
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
CLOUDS MOVING INTO CWA BUT SHOULD DIMINISH SOME SO CURRENT PC FCST
LOOKS OKAY. ISOLATED SHRA THIS MORNING WEST OF I-75. EXPECT MORE
OF THE SAME FOR AFTN WITH BEST CHANCE NORTH OF DAYTON PER CURRENT
FCST. TEMPS AS MENTIONED EARLIER A BIT TRICK WITH CLOUDS BUT
RELUCTANT TO CHANGE WITH GUIDANCE SO HIGH AND SOME SUN EXPECTED.
HEAT ADVISORIES LOOK OKAY. NO CHANGES TO CURRENT FCST EXPECTED.
&&
.SHORT TERM /6 PM THIS EVENING THROUGH MONDAY/...
BROAD UPPER LEVEL TROF SETTLING INTO THE GREAT LAKES FOR SUNDAY
AND FIRST PART OF THE WEEK. SFC COLD FRONT TO PUSH EAST THRU
THE REGION SUNDAY NIGHT. AHD OF APPROACHING COLD FRONT AXIS OF
FAVORABLE 925MB DEVELOPS BETWEEN 06Z AND 12Z TONIGHT. HAVE BUMPED
UP POPS FROM CHC DURING THE EVENING TO LKLY LATE TONIGHT. HAVE
STAYED CLOSE TO WARM GUID TEMPS FOR LOWS TONIGHT.
AFTER EARLY MORNING CONVECTION...QUESTION REVOLVES AROUND HOW MUCH
THE AIRMASS RECOVERS ON SUNDAY. NAM SOLN IS OVERDONE WITH INSTBY
DEVELOPING SFC TD/S NEAR 80. EXPECT MODERATE INSTBY TO DEVELOP IN
AFTN AHD OF THE FRONT. THIS INSTBY COMBINED WITH FAVORABLE BULK
SHEAR WL LKLY LEAD TO ORGANIZED CONVECTION. DAMAGING WINDS WL
BE THE MAIN THREAT. WL MENTION THIS THREAT IN THE HWO PRODUCT.
ALSO...IN VERY MOIST AIRMASS PWATS ARE EXPECTED TO BE ABOVE 2.0
INCHES AHD OF THE FRONT. LOCALIZED HEAVY RAIN WL BE POSSIBLE
AND WL ALSO BE MENTIONED.
MODEL SOLN/S CONTINUE TO SLOW THE PROGRESS OF THE FRONT WITH PASSAGE
THRU ILN/S FA LATE SUNDAY NIGHT. HAVE ENDED POPS FROM WEST TO EAST SUNDAY
NIGHT INTO MONDAY.
HAVE TRENDED BOTH SUNDAY AND MONDAYS HIGHS WARMER BUT NOT QUITE AS
WARM AS MAV GUIDANCE.
&&
.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
DESPITE CONTINUED DISCREPANCIES AMONG MEDIUM RANGE MODELS HEADING
INTO NEXT WEEK...ALL ARE IN AGREEMENT THAT PATTERN CHANGE WILL BE
COMING TO THE OHIO VALLEY FOR MUCH OF THE LONG TERM PERIOD. IN THE
WAKE OF FRONTAL BOUNDARY WHICH WILL SLIDE THROUGH THE AREA SUNDAY
NIGHT...MORE PLEASANT AND MUCH LESS HUMID CONDITIONS ARE INSTORE FOR
THE REMAINDER OF THE PERIOD. MODELS DIFFER ON DEPTH OF THE UPPER
TROUGH WHICH BUILDS INTO THE REGION...AND HOW FAR EAST OF THE AREA
THE SFC FRONTAL BOUNDARY MAKES IT BEFORE STALLING. PREFER A BLEND
OF THE 00Z ECMWF AND GFSENS MEANS...WHICH SUGGEST THE FRONT AND
PRECIP SHOULD STAY JUST EAST OF THE AREA THROUGH THE PERIOD...BUT
CLOSE ENOUGH TO INTRODUCE SLIGHT CHANCE AND LOW CHANCE POPS ACROSS
THE SOUTHEAST WEDS THROUGH FRIDAY. BOTH SOLUTIONS ALSO FORECAST
850 HPA TEMPS RUNNING NEAR AVERAGE...SO WENT LIKEWISE WITH SURFACE
TEMPS THRU NEXT WEEK.
&&
.AVIATION /18Z 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 OHZ054-055-
060>065-070>074-077>082-088.
KY...HEAT ADVISORY UNTIL 8 PM EDT THIS EVENING FOR KYZ089>100.
IN...HEAT ADVISORY UNTIL 8 PM EDT THIS EVENING FOR INZ050-058-059-
066-073>075-080.
&&
SYNOPSIS...AR
NEAR TERM...PADGETT
SHORT TERM...AR
LONG TERM...HAWBLITZEL
AVIATION...PADGETTHAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE WILMINGTON OH 129 PM EDT SAT AUG 14 2010 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ054-055-060>065-070>074- 077>082-088-151730- WAYNE-FAYETTE IN-UNION IN-FRANKLIN IN-RIPLEY-DEARBORN-OHIO- SWITZERLAND-CARROLL-GALLATIN-BOONE-KENTON-CAMPBELL-OWEN-GRANT- PENDLETON-BRACKEN-ROBERTSON-MASON-LEWIS-MADISON-FRANKLIN OH-PREBLE- MONTGOMERY-GREENE-FAYETTE OH-PICKAWAY-FAIRFIELD-BUTLER-WARREN- CLINTON-ROSS-HOCKING-HAMILTON-CLERMONT-BROWN-HIGHLAND-ADAMS-PIKE- SCIOTO- 129 PM EDT SAT AUG 14 2010 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL INDIANA...SOUTHEAST INDIANA...NORTHEAST KENTUCKY...NORTHERN KENTUCKY...CENTRAL OHIO...MIAMI VALLEY OF OHIO...SOUTH CENTRAL OHIO AND SOUTHWEST OHIO. .DAY ONE...THIS AFTERNOON AND 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 REQUIRED TODAY OR SUNDAY. OHZ026-034-035-042>046-051>053-056-151730- HARDIN-MERCER-AUGLAIZE-DARKE-SHELBY-LOGAN-UNION OH-DELAWARE-MIAMI- CHAMPAIGN-CLARK-LICKING- 129 PM EDT SAT AUG 14 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL OHIO...MIAMI VALLEY OF OHIO AND WEST CENTRAL OHIO. .DAY ONE...THIS AFTERNOON AND 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 LATE TONIGHT 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 REQUIRED TODAY OR SUNDAY. BINAU
The Cincinnati radar (KILN), 91 km away, was scanning. The volume nearest the first event began at 18:16 UTC.
7 thunderstorm wind. Local standard time, as filed.
A few trees were reported down and some siding was torn off of a house due to damaging thunderstorm winds.
Large branches were reported down due to damaging thunderstorm winds.
Large branches were reported down due to damaging thunderstorm winds.
A few trees were uprooted and part of a bean field was flattened due to damaging thunderstorm winds.
Large branches were reported down due to damaging thunderstorm winds.
A few trees were reported down due to damaging thunderstorm winds.
Trees were reported down due to damaging thunderstorm winds.
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, 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: 245582, 245577, 245580, 245586, 245584, 245587, 245592.