A cold front pushed into a thin area of instability that had developed due to the strong surface heating during the day. Convection never organized into complete lines, but some individual cells became strong to severe.
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 cold front pushed into a thin area of instability that had developed due to the strong surface heating during the day. Convection never organized into complete lines, but some individual cells became strong to severe. Moisture had advected northward into the area in advance of the front. Motion of the storms was fairly quick and towards the east.
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 Sep 7, 3:04 PM EST, 17 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE WILMINGTON OH 404 PM EDT TUE SEP 7 2010 .SYNOPSIS... SHOWERS AND THUNDERSTORMS WILL BE PRESENT ACROSS THE REGION AS A COLD FRONT MOVES THROUGH THE REGION THIS EVENING. HIGH PRESSURE AND COOLER AIR WILL THEN BUILD IN FOR WEDNESDAY. && .NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/... SHOWERS AND THUNDERSTORMS WILL INCREASE IN COVERAGE OVER THE NEXT FEW HOURS IN ADVANCE OF A COLD FRONT. CAPE VALUES ARE IN EXCESS OF 1000 J/KG ACROSS THE FA. A FEW THUNDERSTORMS MAY REACH SEVERE LIMITS THIS EVENING WITH THE GREATEST THREAT BEING DAMAGING WINDS. COLD FRONT WILL MOVE THROUGH THE FA BY MIDNIGHT AND CLOUD COVER WILL BEGIN TO DISSIPATE. WITH SKIES BECOMING MOSTLY CLEAR AND COOLER AIR BEGINNING TO FILTER INTO THE AREA...EXPECT LOWS IN THE LOWER 50S ACROSS THE NW HALF OF THE FA. LOWS WILL BE IN THE MIDDLE TO UPPER 50S ACROSS SE PORTIONS OF THE FA WHERE CLOUDS WILL TAKE LONGER TO CLEAR OUT. && .SHORT TERM /6 AM WEDNESDAY MORNING THROUGH THURSDAY NIGHT/... A FEW CU WILL DEVELOP DURING THE DAY ON WEDNESDAY HOWEVER THESE WILL DISSIPATE DURING THE EVENING HOURS LEAVING CLEAR SKIES AROUND THE REGION FOR WEDNESDAY NIGHT. THIS WILL ALLOW FOR GOOD RADIATIONAL COOLING AND FOR TEMPERATURES TO FALL INTO THE MIDDLE 40S TO THE LOWER 50S WEDNESDAY NIGHT. HIGH TEMPERATURES WEDNESDAY AND THURSDAY WILL BE SIMILAR WITH HIGHS IN THE 70S. LOW TEMPERATURES WILL WARMER THURSDAY NIGHT THAN WEDNESDAY NIGHT DUE TO CLOUD COVER BEGINNING TO MOVE INTO THE AREA FROM THE REMNANTS OF TROPICAL STORM HERMINE. && .LONG TERM /FRIDAY THROUGH TUESDAY/... HAVE TAKEN A BLEND OF THE 12Z GFS....00Z ECMWF AND HPC GUIDANCE FOR THE EXTENDED FORECAST. THE REMNANTS OF TROPICAL STORM HERMINE IS FORECAST TO ROTATE AROUND AN UPR LVL RIDGE OF HIGH PRESSURE INTO THE MID MS VLY BY FRIDAY MORNING. THEREAFTER...IT IS THEN FORECAST TO WEAKEN/SHEAR AS IT DIVES ESE TOWARD THE TN VLY BY 12Z SATURDAY. THERE STILL REMAINS A LOT OF UNCERTAINTY AT THIS POINT IN TIME AS TO HOW FAR NE THE PCPN SHIELD WITH THIS FEATURE WILL REACH. HAVE THUS CONTINUED WITH CHANCE POPS ACRS THE FAR SW CWFA FRIDAY INTO FRIDAY NIGHT. LATER FORECASTS WILL HAVE TO MONITOR AND ADJUST THE FORECAST ACCORDINGLY SHOULD THE REMNANTS MOVE A LITTLE CLOSER TO THE FORECAST AREA. FOR THE PERIOD SATURDAY THROUGH SUNDAY...A MID LVL TROF WILL MOVE EAST ACRS THE GREAT LAKES AND OHIO VALLEY REGION. AT THE SFC...A WARM FRONT WILL LIFT NE INTO THE REGION ON SATURDAY...FOLLOWED BY A COLD FRONT SATURDAY NIGHT. HAVE CONTINUED WITH CHANCE POPS WITH THIS SYSTEM...TAPERING OFF PCPN FROM WEST TO EAST DURING SUNDAY MORNING. FOR SUNDAY NIGHT INTO MONDAY...SFC HIGH PRESSURE WILL SETTLE IN ACROSS THE OHIO VALLEY...BRINGING A RETURN TO DRY WEATHER. THE HIGH WILL SHIFT EAST OF THE AREA MONDAY NIGHT. EXTENDED MODELS CONTINUE TO HINT AT ANOTHER COLD FRONTAL PASSAGE ON TUESDAY. THE FRONT APPEARS TO BE MOISTURE STARVED AT THIS POINT...SO WILL KEEP THE FORECAST DRY. TEMPERATURES WILL BE TRICKY ON FRIDAY DEPENDING ON THE CLOUD SHIELD FROM THE REMNANTS OF HERMINE AND WHETHER OR NOT STEADY PCPN DEVELOPS. OTHERWISE...ABOVE NORMAL READINGS ARE EXPECTED ON SATURDAY...NEAR NORMAL CONDITIONS ON SUNDAY...WITH A RETURN TO ABOVE NORMAL TEMPERATURES FOR THE FIRST PART OF NEXT WEEK. && .AVIATION /20Z TUESDAY THROUGH SUNDAY/... A SMALL AREA OF CONVECTION HAS DEVELOPED ACROSS CENTRAL INDIANA EARLY THIS AFTERNOON. THIS IS IN AN AREA OF LOW LEVEL CONVERGENCE OUT AHEAD OF THE COLD FRONT THAT IS FORECAST TO PUSH EAST ACROSS OUR AREA THROUGH EARLY EVENING. SLIGHTLY HIGHER DEWPOINTS ADVECTING UP FROM THE SOUTHWEST AHEAD OF THE FRONT SHOULD LEAD TO SOME BETTER INSTABILITIES ACROSS OUR AREA LATER THIS AFTERNOON INTO EARLY THIS EVENING. AS A RESULT...EXPECT TO SEE PCPN COVERAGE BEGIN TO FILL IN AS IT MOVES EAST INTO OUR AREA LATER TODAY. CURRENT TIMING WOULD PUT IT INTO KDAY AROUND 20Z AND THE REMAINING TAF SITES TOWARD 22Z OR SO. WILL COVER SCATTERED THREAT WITH A VCTS AND HAVE TRIED TO LIMIT THE MENTION TO THE MOST FAVORABLE TWO HOUR WINDOW. ONCE THE FRONT MOVES THROUGH...WE DRY OUT FAIRLY QUICKLY WITH SKIES BECOMING MOSTLY CLEAR OVERNIGHT. WITH DEVELOPING CAA...THINK GUSTS COULD STAY UP SOME INTO THIS EVENING. OUTLOOK...THUNDERSTORMS POSSIBLE ON FRIDAY. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...NONE. KY...NONE. IN...NONE. && SYNOPSIS...NOVAK NEAR TERM...NOVAK SHORT TERM...NOVAK LONG TERM...HICKMAN AVIATION...JGL
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE WILMINGTON OH 1020 AM EDT TUE SEP 7 2010 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-081430- 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- 1020 AM EDT TUE SEP 7 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. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP LATER THIS AFTERNOON AND CONTINUE INTO THIS EVENING. THE BEST CHANCE FOR THUNDERSTORMS WILL BE ALONG AND TO THE SOUTHEAST OF INTERSTATE 71. A FEW OF THE STORMS MAY BECOME SEVERE LATE THIS AFTERNOON AND EARLY THIS EVENING WITH THE PRIMARY THREAT BEING DAMAGING WIND. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON OH 410 PM EDT TUE SEP 7 2010 OHZ051>053-061-072100- CLARK OH-MIAMI OH-CHAMPAIGN OH-MONTGOMERY OH- 410 PM EDT TUE SEP 7 2010 ...A STRONG THUNDERSTORM WILL AFFECT EXTREME NORTHEASTERN MONTGOMERY...WESTERN CHAMPAIGN...EASTERN MIAMI AND NORTHWESTERN CLARK COUNTIES THROUGH 500 PM EDT... AT 405 PM EDT...RADAR INDICATED A STRONG THUNDERSTORM NEAR HAVEN VIEW...MOVING EAST AT 35 MPH. WIND GUSTS TO 50 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS STORM. SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE... ST. PARIS...CHRISTIANSBURG...NORTH HAMPTON...DIALTON...THACKERY...LAWRENCEVILLE...TERRE HAUTE...MILLERSTOWN AND TREMONT CITY. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT. IF THIS STORM BECOMES STRONGER...THEN A WARNING MAY BE NEEDED. LAT...LON 4020 8376 3996 8378 3989 8416 4011 8419 HATZOS
The Cincinnati radar (KILN), 69 km away, was scanning. The volume nearest the first event began at 20:23 UTC.
13 thunderstorm wind, 4 hail. Local standard time, as filed.
Multiple trees and power poles were reported down on Cow Path Road.
A barn was blown over on Victory Road. Several trees and power lines were down on Sintz Road. In another location, a roof was peeled back due to damaging thunderstorm winds.
Trees were reported down due to damaging thunderstorm winds.
A new barn was destroyed on Spencer Road due to damaging thunderstorm winds. In addition to the new barn damage, four roofs were blown off barns, 15 large trees were down, siding was damaged on a home, and a grain bin buckled.
A trained spotter reported the wind gust.
Two large tree limbs were reported down due to damaging thunderstorm winds.
Trees were reported down around the area and a barn was destroyed due to damaging thunderstorm winds.
Trees were reported down due to damaging thunderstorm winds.
Trees were reported down due to damaging thunderstorm winds.
Shingles, trim, and gutters were blown off of a house due to damaging thunderstorm winds.
Windows were broken, roof shingles were torn, siding was damaged, and crops were destroyed due to large hail that moved through the area.
Numerous trees were reported down due to damaging thunderstorm winds.
Several trees were reported down due to damaging thunderstorm winds.
Several 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, September 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: 251418, 251422, 251421, 251420, 251424, 251425, 251423, 251426, 251427, 251429, 251430, 251433, 251431, 251432, 251434, 251435, 251436.