Severe weather developed during the day of June 27th. The main threats were damaging winds and flash flooding.
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.
Severe weather developed during the day of June 27th. The main threats were damaging winds and flash flooding.
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 Jun 27, 10:59 AM EST, 1 hour 52 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE WILMINGTON OH 1159 AM EDT SUN JUN 27 2010 .SYNOPSIS... A WARM AND HUMID AIR MASS WILL PERSIST ACROSS THE REGION TODAY. A COLD FRONT WILL CROSS THE REGION LATE TONIGHT INTO MONDAY, HIGH PRESSURE AND DRY WEATHER WILL MOVE IN TUESDAY AND WILL CONTINUE THROUGH THE REST OF THE WEEK. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... UPDATED FOR SEVERE THUNDERSTORM WATCH...WITH MVC MOVING ACROSS SRN WI/NRN IL AND THUNDERSTORM COMPLEX MOVING INTO MODERATE INSTBY EXPECT THE POTENTIAL FOR SEVERE WEATHER TO INCREASE. THE FOCUS WL BE THE LEADING EDGE WITH DAMAGING WINDS BEING THE MAIN THREAT. BETTER WIND FLOW TO THE NORTH SO QUESTION ABOUT HOW FAR SOUTH SEVERE THREAT WL EXTENT. WL CONTINUE TO MONITOR RADAR TRENDS. MOSTLY CLEAR CONDITIONS HAVE ALLOWED TEMPERATURES TO QUICKLY RISE ACROSS THE REGION...PUTTING TEMPS AHEAD OF THE EXPECTED CURVE. UPDATED HIGH TEMPS TO INCREASE THINGS A DEGREE OR TWO. MIGHT HAVE GONE EVEN FURTHER BUT NOT WITH A CUMULUS FIELD STARTING TO DEVELOP AND OTHER CLOUDS (AND LATER STORMS) MOVING IN FROM THE WEST. 12Z KILN SOUNDING INDICATES A PRETTY FAVORABLE PROFILE FOR NOTEWORTHY INSTABILITY TO DEVELOP. THE 06Z MODEL RUNS ACTUALLY LOOKED TO UNDERDO THINGS A BIT IN COMPARISON WITH THE OBSERVED SOUNDING...MAYBE DUE TO BOUNDARY LAYER MOISTURE BEING UNDER-ANALYZED. PROBABLY LOOKING AT 1500-2000 J/KG MLCAPE ALREADY ACROSS THE SOUTHWESTERN PORTION OF THE AREA...WITH MORE TO COME AS HEATING CONTINUES. ON THE OTHER HAND...WIND SHEAR IS SUFFICIENT BUT NOT TERRIBLY IMPRESSIVE. 0-6KM BULK SHEAR IN THE 20-30 KNOT RANGE WILL BE ENOUGH TO PROVIDE SOME STRUCTURE...BUT WIDESPREAD ORGANIZATION IS NOT AS LIKELY. A FORCING FOCUS IS A LITTLE BIT IN QUESTION TOO BUT THERE ARE INDICATIONS OF A WEAK SURFACE WAVE PASSING EASTWARD...WHICH MAY TIME THINGS OUT SIMILAR TO THE 00Z SPC WRF- 4KM. DAMAGING WIND LOOKS LIKE THE PRIMARY THREAT WITH THE POTENTIAL FOR DOWNBURST WIND AND SOME OUTFLOW-DOMINATED STUFF AS STORM CLUSTERS TAKE A LITTLE BIT OF ORGANIZATION. WITH THE VERY WARM ATMOSPHERE...LARGE HAIL WILL BE HARDER TO COME BY...BUT NOT IMPOSSIBLE GIVEN THE INSTABILITY. BEST TORNADO THREAT LOOKS TO BE NORTH OF THE FORECAST AREA WHERE SHEAR IS BETTER. ADJUSTED POPS INTO THE HIGH CHANCE CATEGORY FOR THE AFTERNOON AND EVENING...BUT OPTED TO LEAVE THE LIKELY POPS FOR THE BETTER RAINFALL CHANCES CLOSER TO THE FRONT OVERNIGHT. && .SHORT TERM /6 PM THIS EVENING THROUGH TUESDAY/... CDFNT PUSHES UP THE OH VLY TNGT. COVERAGE SHOULD INCREASE AS THE FRONT APPROACHES. KEPT LIKELY POPS ACRS THE FA TNGT. FNT PUSHES ACRS THE FA ON MONDAY. TSTM ACTIVITY WILL END FROM NW TO SE DURING THE DAY. HIGH PRESSURE BUILDS IN FROM THE N MONDAY NIGHT. MUCH COOLER AND DRIER AIR MASS WORKS IN ON TUE. NAM DEVELOPED SOME CAA SC AND SHRA TUE. IT IS THE ONLY MODEL DOING THIS...SO WILL CONSIDER IT AN OUTLIER AND WILL KEEP TUE DRY. WENT CLOSE TO GFS MOS THRU THE PERIOD. && .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... UPPER LEVEL RIDGE TO BUILD OVER THE ROCKIES WITH A LOW SETTLING INTO SE CANADA THRU EARLY NEXT WEEK. THIS PLACES THE OHIO VALLEY IN A NORTHWESTERLY FLOW PATTERN WITH SFC HIGH PRESSURE BUILDING SE INTO THE REGION. THIS HIGH WILL DOMINATE THE WEATHER THROUGH THE REMAINDER OF THE WEEK BECOMING CENTERED OVER OHIO BY FRIDAY. EXPECT DRY CONDITIONS WITH COOLER TEMPS IN THE WAKE OF THIS FRONT THRU THE END OF THE WEEK WHEN TEMPS BEGIN TO WARM UP INTO NEXT WEEKEND. TEMP WISE...PREFER HIGHS A LTL ABOVE MEX FOR THE PERIOD FROM TUESDAY THRU THURSDAY AND STAYED CLOSE ON FRIDAY. HAVE GENERALLY TRENDED LOWS AT OR SLIGHTLY ABOVE GUID THRU THE PERIOD. && .AVIATION /16Z SUNDAY THROUGH THURSDAY/... SCATTERED CU WILL DEVELOP EARLY AND THICKEN DURING THE AFTERNOON. SOME DEEPER VERTICAL DEVELOPMENT WILL LIKELY OCCUR BY LATE MORNING...POSSIBLY RESULTING IN A BKN DECK AOA 3KFT. SCATTERED SHOWERS WILL BEGIN TO POP UNDER THE DEEPER CLOUD COVER POSSIBLY BEGINNING BEFORE NOON. HOWEVER...PLACEMENT OF ANY SHOWERS BEFORE THEY ACTUALLY DEVELOP IS NOT PRACTICAL NOR SHOULD THEY HIT ALL OF THE TAF SITES. I LEFT OUT ANY VCSH UNTIL AFTER 17Z IN CENTRAL OHIO...EVEN LATER FOR THE REST OF CWA. THE FRONT THAT WILL SQUEEZE OUT MORE THUNDERSTORM ACTIVITY BEGINS TO DEVELOP OVERNIGHT SW-NE OVER I-71 CORRIDOR...MAYBE A LITTLE MORE NW. THIS DEVELOPMENT WILL SEE SOME THUNDERSTORMS POP ALONG IT AND BECOME MORE ORGANIZED INTO MONDAY. MVFR CIGS SHOULD BECOME MORE PREVALENT LATE THIS AFTERNOON AND EVENING BUT WILL BE HIT AND MISS BEGINNING AS EARLY AS LATE MORNING. OUTLOOK...THUNDERSTORMS POSSIBLE MONDAY. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...NONE. KY...NONE. IN...NONE. && SYNOPSIS...SITES NEAR TERM...HATZOS/RANDALL SHORT TERM...SITES LONG TERM...AR AVIATION...FRANKS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE WILMINGTON OH 1152 AM EDT SUN JUN 27 2010 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ045-046-051>056-060>065- 070>074-077>082-088-281600- WAYNE-FAYETTE IN-UNION IN-FRANKLIN IN-RIPLEY-DEARBORN-OHIO- SWITZERLAND-CARROLL-GALLATIN-BOONE-KENTON-CAMPBELL-OWEN-GRANT- PENDLETON-BRACKEN-ROBERTSON-MASON-LEWIS-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- 1152 AM EDT SUN JUN 27 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 AND SOUTHWEST OHIO. .DAY ONE...THIS AFTERNOON AND TONIGHT. HEAT INDEX VALUES WILL APPROACH 100 DEGREES THIS AFTERNOON. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP AND AFFECT THE REGION THIS AFTERNOON AND INTO THE EVENING. SOME OF THESE STORMS MAY BECOME SEVERE. DAMAGING WIND WILL BE THE PRIMARY THREAT...ALTHOUGH A FEW STORMS MAY PRODUCE LARGE HAIL. HEAVY RAIN...ISOLATED FLOODING...AND FREQUENT CLOUD TO GROUND LIGHTNING ARE ALSO POSSIBLE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. ADDITIONAL SHOWERS AND THUNDERSTORMS WILL CONTINUE INTO THE DAY ON MONDAY...MAINLY ALONG AND SOUTH OF INTERSTATE 71. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. OHZ026-034-035-042>044-281600- HARDIN-MERCER-AUGLAIZE-DARKE-SHELBY-LOGAN- 1152 AM EDT SUN JUN 27 2010 ...SEVERE THUNDERSTORM WATCH 423 IN EFFECT UNTIL 7 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIAMI VALLEY OF OHIO AND WEST CENTRAL 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. SEVERE THUNDERSTORM WATCH. HEAT INDEX VALUES WILL APPROACH 100 DEGREES THIS AFTERNOON. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP AND AFFECT THE REGION THIS AFTERNOON AND INTO THE EVENING. SOME OF THESE STORMS MAY BECOME SEVERE. DAMAGING WIND WILL BE THE PRIMARY THREAT...ALTHOUGH A FEW STORMS MAY PRODUCE LARGE HAIL. HEAVY RAIN...ISOLATED FLOODING...AND FREQUENT CLOUD TO GROUND LIGHTNING ARE ALSO POSSIBLE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. ADDITIONAL SHOWERS AND THUNDERSTORMS WILL CONTINUE INTO THE DAY ON MONDAY...MAINLY ALONG AND SOUTH OF INTERSTATE 71. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATER THIS AFTERNOON.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON OH 1029 AM EDT SUN JUN 27 2010 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-272200- 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- INCLUDING THE CITIES OF...RICHMOND...CONNERSVILLE...LIBERTY... BROOKVILLE...VERSAILLES...LAWRENCEBURG...RISING SUN...VEVAY... CARROLLTON...WARSAW...BURLINGTON...INDEPENDENCE...ALEXANDRIA... OWENTON...WILLIAMSTOWN...FALMOUTH...BROOKSVILLE...MOUNT OLIVET... MAYSVILLE...VANCEBURG...KENTON...CELINA...WAPAKONETA... GREENVILLE...SIDNEY...BELLEFONTAINE...MARYSVILLE...DELAWARE... PIQUA...URBANA...SPRINGFIELD...LONDON...COLUMBUS...NEWARK... EATON...DAYTON...XENIA...WASHINGTON COURT HOUSE...CIRCLEVILLE... LANCASTER...HAMILTON...LEBANON...WILMINGTON...CHILLICOTHE... LOGAN...CINCINNATI...MILFORD...GEORGETOWN...HILLSBORO... WEST UNION...PIKETON...PORTSMOUTH 1029 AM EDT SUN JUN 27 2010 ...WARM AND HUMID CONDITIONS THIS AFTERNOON... WARM TEMPERATURES AND HIGH HUMIDITY VALUES ARE OCCURRING TODAY. HIGH TEMPERATURES WILL BE IN THE UPPER 80S TO AROUND 90...WITH DEWPOINTS IN THE LOWER TO MID 70S. HEAT INDEX VALUES WILL BRIEFLY APPROACH 100 DEGREES THIS AFTERNOON. PERSONS ENGAGING IN OUTDOOR ACTIVITIES COULD EXPERIENCE HEAT- RELATED ILLNESSES IF PROPER PRECAUTIONS ARE NOT TAKEN. DRINK PLENTY OF WATER EVEN IF YOU ARE NOT THIRSTY. WEAR LIGHT-WEIGHT AND LIGHT-COLORED CLOTHING. STAY IN AN AIR-CONDITIONED ROOM AND STAY OUT OF THE SUN IF POSSIBLE. CHECK ON NEIGHBORS OR RELATIVES...ESPECIALLY THE ELDERLY AND CHILDREN AND YOUR PETS AS WELL. NEVER LEAVE CHILDREN OR PETS UNATTENDED IN VEHICLES. HATZOS
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
1157 AM EDT SUN JUN 27 2010
INZ073>075-080-KYZ089-090-271700-
DEARBORN IN-RIPLEY IN-OHIO IN-SWITZERLAND IN-GALLATIN KY-CARROLL KY-
1157 AM EDT SUN JUN 27 2010
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CARROLL...GALLATIN...
SWITZERLAND...OHIO...RIPLEY AND DEARBORN COUNTIES THROUGH 100 PM
EDT...
AT 1156 AM EDT...RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE
EXTENDING FROM 8 MILES WEST OF NEW MARION TO 16 MILES SOUTHWEST OF
LOCUST...MOVING EAST AT 40 MPH.
WIND GUSTS TO 50 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THESE
STORMS.
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...OSGOOD...VERSAILLES...
CARROLLTON...VEVAY...MILAN...DILLSBORO...MOORES HILL...WARSAW AND
AURORA.
ALSO...NEW MARION...HOLTON...REXVILLE...LOCUST...OTTER VILLAGE...
BENHAM...PRESTONVILLE AND OLEAN ARE NEAR THE PATH OF THESE LINE OF
STRONG THUNDERSTORMS.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT. IF THESE STORMS BECOME
STRONGER...THEN A WARNING MAY BE NEEDED.
LAT...LON 3916 8546 3928 8485 3906 8490 3894 8486
3891 8488 3890 8484 3873 8479 3859 8510
3859 8521 3874 8534 3875 8527 3871 8521
3891 8522 3892 8546
HATZOSSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
1247 PM EDT SUN JUN 27 2010
INZ074-075-080-KYZ089>095-OHZ077-271745-
DEARBORN IN-OHIO IN-SWITZERLAND IN-GRANT KY-BOONE KY-CAMPBELL KY-
KENTON KY-GALLATIN KY-CARROLL KY-OWEN KY-HAMILTON OH-
1247 PM EDT SUN JUN 27 2010
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT HAMILTON...NORTHWESTERN
OWEN...CARROLL...GALLATIN...KENTON...CAMPBELL...BOONE...NORTHWESTERN
GRANT...SWITZERLAND...OHIO AND SOUTHERN DEARBORN COUNTIES THROUGH 145
PM EDT...
AT 1244 PM EDT...RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE
EXTENDING FROM 17 MILES NORTHWEST OF WEST HARRISON TO MILTON TO 8
MILES SOUTHWEST OF SQUIRESVILLE THAT WERE NEARLY STATIONARY.
WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS.
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...RISING SUN...
LAWRENCEBURG...HIDDEN VALLEY...GREENDALE...BRIGHT...AURORA...
WILDER...WARSAW...WALTON...VILLA HILLS...UNION AND TAYLOR MILL.
ALSO...QUERCUS GROVE...EAST ENTERPRISE...MARKLAND...CENTER SQUARE...
ALLENSVILLE...FRENCH...PATE AND HARTFORD ARE NEAR THE PATH OF THESE
LINE OF STRONG THUNDERSTORMS.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT. IF THESE STORMS BECOME
STRONGER...THEN A WARNING MAY BE NEEDED.
LAT...LON 3851 8500 3851 8503 3853 8504 3856 8502
3857 8506 3863 8509 3912 8510 3930 8477
3927 8430 3888 8434 3879 8450 3879 8454
3877 8454 3850 8499
HATZOSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
1251 PM EDT SUN JUN 27 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1224 PM TSTM WND DMG CARROLLTON 38.68N 85.16W
06/27/2010 CARROLL KY LAW ENFORCEMENT
ONE LARGE LIMB DOWNED ON POWER LINES.
1227 PM TSTM WND DMG 9 N VEVAY 38.87N 85.08W
06/27/2010 SWITZERLAND IN LAW ENFORCEMENT
ONE TREE DOWNED IN FAIRVIEW.
&&
HATZOSSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
150 PM EDT SUN JUN 27 2010
KYZ096>099-OHZ078-079-081-271830-
PENDLETON KY-BRACKEN KY-MASON KY-ROBERTSON KY-CLERMONT OH-BROWN OH-
ADAMS OH-
150 PM EDT SUN JUN 27 2010
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT WESTERN ADAMS...
SOUTHERN BROWN...SOUTHERN CLERMONT...ROBERTSON...MASON...BRACKEN AND
SOUTHEASTERN PENDLETON COUNTIES THROUGH 230 PM EDT...
AT 147 PM EDT...RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE
EXTENDING FROM FELICITY TO MCKINNEYSBURG...MOVING EAST AT 40 MPH.
WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS LINE OF STRONG
THUNDERSTORMS.
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...BROOKSVILLE...
AUGUSTA...GEORGETOWN...RIPLEY...WINCHESTER...WASHINGTON...ABERDEEN...
MAYSVILLE AND LEWISBURG.
ALSO...BROWNING CORNER...NEAVE...BERLIN...ROCK SPRINGS...FEESBURG...
WOOLCUTT...UTOPIA AND POWERSVILLE ARE NEAR THE PATH OF THESE LINE OF
STRONG THUNDERSTORMS.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT. IF THESE STORMS BECOME
STRONGER...THEN A WARNING MAY BE NEEDED.
LAT...LON 3844 8403 3848 8418 3855 8423 3857 8422
3856 8440 3884 8422 3899 8363 3851 8369
3846 8386 3849 8394 3845 8398 3844 8397
3842 8400
HATZOSThe Cincinnati radar (KILN), 49 km away, was scanning. The volume nearest the first event began at 17:51 UTC.
11 thunderstorm wind, 3 flash flood, 1 hail. Local standard time, as filed.
Trees were reported down due to damaging thunderstorm winds.
A gazebo and a few trees were blown down due to damaging thunderstorm winds.
Large tree branches and small trees were reported down due to damaging thunderstorm winds.
Large tree limbs were reported down due to damaging thunderstorm winds.
Trees and large tree limbs were reported down due to damaging thunderstorm winds.
Trees were reported down due to damaging thunderstorm winds.
Trees were reported down due to damaging thunderstorm winds.
One barn was destroyed and another damaged due to damaging thunderstorm winds. A wheat field was damaged due to debris that blew into the field. Nearby, the house had damage to the siding.
Trees were reported down due to damaging thunderstorm winds.
Large tree limbs were reported down due to damaging thunderstorm winds.
Large tree limbs were reported down due to damaging thunderstorm winds.
Six inches of flowing water was reported over roadways due to heavy rainfall.
Some neighborhoods had flooded streets due to heavy rainfall.
Significant standing water was reported in some locations.
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, June 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: 231150, 231151, 231152, 231154, 231155, 231156, 231157, 235296, 231158, 231159, 231160, 231161, 231164, 231165, 231166.