A boundary stretching near the Interstate 70 corridor was the focus for the development of isolated thunderstorms during the evening. One of these storms briefly became 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 boundary stretching near the Interstate 70 corridor was the focus for the development of isolated thunderstorms during the evening. One of these storms briefly became severe. The main severe weather threat was damaging thunderstorm winds.
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 Jul 7, 6:43 PM EST, 2 hours 1 minute earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE WILMINGTON OH 743 PM EDT THU JUL 7 2011 .SYNOPSIS... AN UPPER LEVEL DISTURBANCE WILL SWING ACROSS THE AREA LATE TONIGHT INTO FRIDAY...BRING A CHANCE OF SHOWERS AND THUNDERSTORMS. HIGH PRESSURE WILL BUILD FOR THE WEEKEND...BRINGING FAIR...BUT HOT AND HUMID WEATHER. && .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/... WEAK FRONTAL BOUNDARY REMAINS NR I-70 THIS AFTN. WITH 1-2K J/KG OF CAPE ACROSS THE REGION S OF THE BOUNDARY...ISOLATED TO SCATTERED CONVECTION IS POSSIBLE LATE THIS AFTN INTO THE EVENING. FOCUS THEN SHIFTS TO H5 S/W THAT IS FCST TO SWING OUT OF PLAINS AND INTO THE OH VALLEY TONIGHT. CONSENSUS OF MODELS IS TO DEVELOP CONVECTIVE COMPLEX IN MO/SRN IL AND SWING IT UP THE OH RIVER. MODELS DIFFER ON HOW FAR E THE STEADIEST RAINS WORK BY 12Z. THE ECMWF AND CMC HEMISPHERIC SPREAD THE BETTER QPF ALL THE WAY TO THE WV/OH BORDER NR PKB. THE NAM IS THE SLOWEST KEEPING STUFF BACK BY EVV AT 12Z. THE GFS/CMC REGIONAL ARE THE COMPROMISE AND PUSH THE BETTER QPF INTO THE CVG TRI-STATE REGION. WENT WITH THE GFS SOLUTION. UPPED POPS IN THE SW TO LIKELY TO CATEGORICAL. TAPERED POPS OFF THE SLIGHT CHC IN THE FAR E. LEANED TOWARDS THE WARMER NAM MOS TEMPS WITH THE PCPN AND CLOUD COVER WORKING IN OVERNIGHT. && .SHORT TERM /6 AM FRIDAY MORNING THROUGH FRIDAY NIGHT/... S/W SWINGS ACROSS THE FA ON FRIDAY. MODELS SWING THE BEST POPS ALONG THE OH RIVER DURING THE MORNING...THEN START TO PULL THEM OUT FROM W TO E IN THE AFTERNOON. WENT WITH CATEGORICAL POPS ACROSS THE S...WITH A TAPER TO CHC IN THE N. HIGH PRESSURE BUILDS IN FROM THE NW FRIDAY NIGHT. AFTER A SLIGHT CHC POP IN THE SE EARLY FRIDAY NIGHT THE REST OF THE AREA AND NIGHT SHOULD BE DRY. WENT BELOW MOS IN THE S WITH THE PCPN AND CLOUDS FOR HIGHS TOMORROW. WENT A MODEL BLEND FOR LOWS FRIDAY NIGHT...WHICH GAVE LOWS A LITTLE WARMER THAN MOS. && .LONG TERM /SATURDAY THROUGH THURSDAY/... MODELS ARE IN GOOD AGREEMENT FOR THE FIRST PART OF THIS PERIOD IN PLACING HIGH PRESSURE ACROSS THE GREAT LAKES AND OHIO VALLEY. THEREFORE...KEPT A DRY FORECAST FOR SATURDAY AND SUNDAY WITH SURFACE HIGH TRAVELING EASTWARD ALONG THE NORTHERN PERIPHERY OF A BROAD AND FLAT UPPER RIDGE. BOTH THE GFS AND ECMWF SHOW A FRONTAL BOUNDARY DROPPING SOUTH FROM THE GREAT LAKES MONDAY INTO TUESDAY...SO WENT WITH A CHANCE OF THUNDERSTORMS FOR THAT TIME FRAME. MODELS DIVERGE SOMEWHAT AFTER THAT WITH THE GFS SHOWING A SURFACE HIGH OVER THE REGION WHILE THE ECMWF INDICATES THE HIGH FARTHER NORTH...WITH A FRONTAL BOUNDARY PERSISTING ALONG AN UPPER RIDGE AXIS TO THE WEST. WENT CLOSER TO THE GFS WHICH HAS BEEN MORE CONSISTENT WITH THIS PATTERN AND KEPT POPS BELOW THE 25 PERCENT THRESHOLD. TEMPERATURES WILL BE NEAR NORMAL ON SATURDAY WITH HIGHS IN THE MID TO UPPER 80S. READINGS WILL LIKELY INCREASE ON SUNDAY AND MONDAY DUE TO WARM ADVECTION AND AIRMASS MODIFICATION...WITH HIGHS FORECAST TO BE AROUND 90. A SLIGHT AMOUNT OF COLD ADVECTION MAY CAUSE HIGH TEMPERATURES TO BE A FEW DEGREES LOWER FOR TUESDAY THROUGH THURSDAY...BACK INTO THE MID AND UPPER 80S. && .AVIATION /00Z FRIDAY THROUGH TUESDAY/... A BOUNDARY STRETCHED ACROSS SOUTHERN OHIO IS EVIDENT ON RADAR IMAGERY...AS ISOLATED SHOWERS AND STORMS HAVE DEVELOPED. THIS ACTIVITY (AND OTHER NEARBY CELLS) WILL PROBABLY REMAIN IN PLACE FOR THE NEXT FEW HOURS...BEFORE DAYTIME HEATING IS LOST. THE BEST CHANCE SEEMS TO BE FOR DAYTON IN THE NEXT HOUR OR TWO. HOWEVER...WITH THE ISOLATED NATURE MAKING IT UNCERTAIN AS TO WHETHER OR NOT AN EXACT POINT WILL BE IMPACTED AT ALL. A BETTER CHANCE OF SHOWERS AND STORMS WILL ARRIVE LATE OVERNIGHT AND INTO THE MORNING HOURS...AS A WEATHER DISTURBANCE MOVES EAST FROM THE MIDDLE MISSISSIPPI VALLEY. THERE REMAINS UNCERTAINTY AS TO THE TRACK OF THE REGION OF STEADY PRECIPITATION...BUT IT STILL APPEARS MORE LIKELY TO AFFECT THE CINCINNATI TAF SITES. THERE IS ENOUGH CONFIDENCE TO INCLUDE A TEMPO FOR SOME RAIN SHOWERS AT DAYTON AND WILMINGTON...BUT COLUMBUS MAY BE TOO FAR NORTH TO BE IMPACTED BY THE STEADIER RAINFALL. ASIDE FROM THE ATTEMPTS TO TIME OUT THIS ACTIVITY...THERE REMAINS A POSSIBILITY FOR OTHER ISOLATED SHOWERS AND STORMS IN AND NEAR THE PASSAGE OF THIS DISTURBANCE. SO...THE TAFS WILL CARRY A RATHER LONG VCSH/CB COMBO AT THIS TIME. TRANQUIL CONDITIONS WILL SETTLE IN BY FRIDAY NIGHT BEHIND THE DISTURBANCE. OUTLOOK...THERE IS A CHANCE OF THUNDERSTORMS ON MONDAY. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...NONE. KY...NONE. IN...NONE. && SYNOPSIS...SITES NEAR TERM...SITES SHORT TERM...SITES LONG TERM...CONIGLIO AVIATION...HATZOS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE WILMINGTON OH 422 PM EDT THU JUL 7 2011 INZ050-058-059-066-OHZ026-034-035-042>046-051>056-060>065-070>074- 082030- WAYNE-FAYETTE IN-UNION IN-FRANKLIN IN-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- 422 PM EDT THU JUL 7 2011 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. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. HIGH PRESSURE WILL BUILD ACROSS THE AREA OVER THE WEEKEND...WITH UNSEASONABLY WARM TEMPERATURES EXPECTED. BY SUNDAY...DAYTIME HEAT INDICES WILL CLIMB INTO THE MID TO UPPER 90S ACROSS MUCH OF THE AREA. EVEN HIGHER HEAT INDICES ARE POSSIBLE ON MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. INZ073>075-080-KYZ089>100-OHZ077>082-088-082030- RIPLEY-DEARBORN-OHIO-SWITZERLAND-CARROLL-GALLATIN-BOONE-KENTON- CAMPBELL-OWEN-GRANT-PENDLETON-BRACKEN-ROBERTSON-MASON-LEWIS-HAMILTON- CLERMONT-BROWN-HIGHLAND-ADAMS-PIKE-SCIOTO- 422 PM EDT THU JUL 7 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST INDIANA...NORTHEAST KENTUCKY...NORTHERN KENTUCKY...SOUTH CENTRAL OHIO AND SOUTHWEST OHIO. .DAY ONE...TONIGHT. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. AN AREA OF SHOWERS AND THUNDERSTORMS IS FORECAST TO WORK ACROSS THE REGION FRIDAY. LOCALLY HEAVY RAINS ARE POSSIBLE AND MAY CAUSE BRIEF PONDING OF WATER ON ROADS WAYS AND RAPID RISES ON CREEKS AND STREAMS. HIGH PRESSURE WILL BUILD ACROSS THE AREA OVER THE WEEKEND...WITH UNSEASONABLY WARM TEMPERATURES EXPECTED. BY SUNDAY...DAYTIME HEAT INDICES WILL CLIMB INTO THE MID TO UPPER 90S ACROSS MUCH OF THE AREA. EVEN HIGHER HEAT INDICES ARE POSSIBLE ON MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
444 PM EDT THU JUL 7 2011
OHZ064-065-073-074-072130-
FAIRFIELD OH-HOCKING OH-PICKAWAY OH-ROSS OH-
444 PM EDT THU JUL 7 2011
...A CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN
ROSS...SOUTHEASTERN PICKAWAY...WESTERN HOCKING AND SOUTHERN
FAIRFIELD COUNTIES THROUGH 530 PM EDT...
AT 440 PM EDT...RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS
NEAR TARLTON. THESE STORMS WERE NEARLY STATIONARY.
WIND GUSTS TO 40 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS STORM.
IN ADDITION...HEAVY DOWNPOURS CAN BE EXPECTED.
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...ROCKBRIDGE AND SUGAR
GROVE.
ALSO...SOUTH BLOOMINGVILLE...AMANDA...CLEARPORT...ENTERPRISE AND LAKE
LOGAN STATE PARK ARE NEAR THE PATH OF THIS STRONG THUNDERSTORM.
LAT...LON 3974 8251 3945 8243 3938 8275 3948 8291
3966 8284
HATZOSSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
538 PM EDT THU JUL 7 2011
OHZ064-073-074-072215-
HOCKING OH-PICKAWAY OH-ROSS OH-
538 PM EDT THU JUL 7 2011
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN ROSS...SOUTHEASTERN
PICKAWAY AND SOUTHWESTERN HOCKING COUNTIES THROUGH 615 PM EDT...
AT 535 PM EDT...RADAR INDICATED A STRONG THUNDERSTORM NEAR
KINGSTON...MOVING EAST AT 15 MPH.
WIND GUSTS TO 40 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS STORM.
HEAVY DOWNPOURS WILL ALSO BE POSSIBLE...WHICH MAY CAUSE SOME PONDING
OF WATER ON ROADWAYS.
THE STRONG THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF
NORTHEASTERN ROSS...SOUTHEASTERN PICKAWAY AND SOUTHWESTERN HOCKING
COUNTIES...INCLUDING WHISLER...HALLSVILLE...TARLTON...ADELPHI AND
LAURELVILLE.
LAT...LON 3937 8263 3936 8264 3936 8272 3942 8294
3948 8296 3956 8293 3955 8261 3937 8260
HATZOSSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
619 PM EDT THU JUL 7 2011
OHZ074-072245-
HOCKING OH-
619 PM EDT THU JUL 7 2011
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN HOCKING COUNTY
THROUGH 645 PM EDT...
AT 618 PM EDT...RADAR INDICATED A STRONG THUNDERSTORM NEAR
LAURELVILLE...MOVING SOUTHEAST AT 10 MPH.
WIND GUSTS TO 40 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS STORM.
IN ADDITION...HEAVY RAIN CAN BE EXPECTED WITH THIS STORM.
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...HOCKING HILLS STATE
PARK.
ALSO...SOUTH BLOOMINGVILLE IS NEAR THE PATH OF THIS STRONG
THUNDERSTORM.
WATER WILL POND ON ROADS AND MAY QUICKLY FILL ROADSIDE DITCHES AND
SMALL STREAMS.
LAT...LON 3939 8249 3939 8250 3937 8252 3937 8263
3936 8264 3936 8272 3937 8275 3955 8274
3946 8244SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
722 PM EDT THU JUL 7 2011
OHZ060-080000-
PREBLE OH-
722 PM EDT THU JUL 7 2011
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN PREBLE COUNTY
THROUGH 800 PM EDT...
AT 717 PM EDT...RADAR INDICATED A STRONG THUNDERSTORM NEAR NEW HOPE
THAT WAS NEARLY STATIONARY.
WIND GUSTS TO 40 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS STORM.
IN ADDITION...THIS STORM WILL PRODUCE HEAVY RAINFALL. THIS MAY LEAD
TO PONDING OF WATER ON ROADS.
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...NEW PARIS AND OKLAHOMA.
LAT...LON 3990 8482 3990 8460 3981 8460 3971 8466
3971 8481
HATZOSSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
927 PM EDT THU JUL 7 2011
OHZ053-054-080200-
CLARK OH-MADISON OH-
927 PM EDT THU JUL 7 2011
...A STRONG THUNDERSTORM WILL AFFECT NORTHERN MADISON AND EASTERN
CLARK COUNTIES THROUGH 1000 PM EDT...
AT 925 PM EDT...RADAR INDICATED A STRONG THUNDERSTORM NEAR LONDON...
MOVING NORTHEAST AT 10 MPH.
WIND GUSTS TO 40 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS STORM.
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...LONDON AND CHOCTAW
LAKE.
ALSO...MADISON LAKE...LAFAYETTE...ROSEDALE AND PLUMWOOD ARE NEAR THE
PATH OF THIS STRONG THUNDERSTORM.
LAT...LON 3994 8355 4002 8350 4009 8349 4001 8326
3982 8342 3986 8359
MKThe Cincinnati radar (KILN), 63 km away, was scanning. The volume nearest the first event began at 01:42 UTC.
1 thunderstorm wind. Local standard time, as filed.
Two barns were knocked down and wires were reported down near Highway 40. Trees were also reported down in the area. These occurrences were due to damaging thunderstorm winds.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2011Every state in 2011This day in weather historyWarnings in Ohio, July 2011
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: 327539.