A severe Mesoscale Convective System tracked from Indiana into much of Ohio during the late evening hours.
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 severe Mesoscale Convective System tracked from Indiana into much of Ohio during the late 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 Jun 12, 3:35 PM EST, 1 hour 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE WILMINGTON OH 435 PM EDT SAT JUN 12 2010 .SYNOPSIS... SATURDAY AFTERNOON A LOW PRESSURE SYSTEM WAS LOCATED ACROSS THE GREAT LAKES AND A WEAK COLD FRONT EXTENDED ACROSS MICHIGAN...ILLINOIS AND INTO IOWA. WITH A MOIST AIRMASS CURRENTLY IN PLACE...SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE TONIGHT. THE THREAT FOR SHOWERS AND THUNDERSTORMS WILL THEN PERSIST INTO EARLY NEXT WEEK AS THE COLD FRONT SLOWLY DROPS DOWN FROM THE NORTHWEST THROUGH MONDAY. && .NEAR TERM /UNTIL 6 AM SUNDAY MORNING/... THE AREA OF HEAVY RAINFALL HAS MOVED OUT OF THE FORECAST AREA AND TO THE SOUTHEAST. THE FLASH FLOOD WATCH HAS BEEN CANCELED. HOWEVER...SCATTERED SHOWERS AND THUNDERSTORMS WERE DEVELOPING ACROSS THE REGION LATE THIS AFTERNOON WITH THE MOST WIDESPREAD ACTIVITY NEAR THE OHIO RIVER. THIS ACTIVITY SHOULD DIMINISH AROUND MIDNIGHT AS THE BEST 850H CONVERGENCE MOVES OFF TO THE EAST. LOW TEMPERATURES TONIGHT SHOULD ONLY DROP INTO THE LOWER 70S. && .SHORT TERM /6 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/... EXPECT THE COLD FRONT TO THE NORTH TO DROP SOUTH NEAR OR INTO THE NORTHERN FORECAST AREA SUNDAY AND SUNDAY NIGHT. SEVERAL WEAK WAVES ARE FORECAST TO PUSH EAST ALONG THE FRONT SUNDAY AND SUNDAY NIGHT. THERE IS SOME UNCERTAINTY ON THE TIMING OF THESE WAVES SO KEPT POPS THROUGH SUNDAY NIGHT IN THE HIGH CHANCE CATEGORY. TEMPERATURES ON SUNDAY EXPECTED TO BE IN THE MID TO UPPER 80S WITH LOWS SUNDAY NIGHT RANGING FROM THE UPPER 60S IN THE NORTH TO THE LOWER 70S IN THE SOUTH. && .LONG TERM /MONDAY THROUGH SATURDAY/... PERIOD BEGINS WITH A CONSENSUS OF MODELS HAVING CDFNT LOCATED JUST NW OF THE FA. FRONT WILL PUSH THRU THE AREA ON MONDAY. THIS WILL ACT AS FOCUS FOR TSTM. MODELS STALL FNT NR THE OH RIVER MON NGT. EXPECT SCT TSTM TO DEVELOP AGAIN ON TUE WITH FNT IN THE VCNTY. MODELS DEVELOP SFC LOW IN RESPONSE TO H5 S/W SWINGING THRU THE UPPER MS VLY TUE NGT INTO WED. THIS LOW PUSHES CDFNT THRU THE FA ON WED. WENT WITH HIGH CHC POPS WED WITH THIS SYSTEM. HIGH PRESSURE FINALLY BUILDS IN ON WED NGT INTO THU. HIGH PRESSURE REMAINS IN CONTROL THRU FRI...WHEN ANOTHER CDFNT SWINGS OUT OF THE MS VLY. GFS AND ECMWF DIFFER ON TIMING...WITH THE ECMWF BEING QUICKER THAN THE GFS. RAN A COMPROMISE BETWEEN THE TWO. FOR MONDAY WENT A LITTLE COOLER THAN THE GFS MOS. THEN WENT WITH AN HPC/GFS MOS BLEND FOR TEMPS FOR THE REST OF THE PERIOD. && .AVIATION /20Z SATURDAY THROUGH THURSDAY/... HEAVIER RAINFALL HAS EXITED THE TAF SITES HOWEVER LOW CLOUDS ARE STILL PREVALENT ACROSS THE AREA. GENERALLY EXPECT AN IMPROVEMENT IN CIGS AS THE AFTERNOON PROGRESSES. EXPECT ADDITIONAL THUNDERSTORM ACTIVITY THIS AFTERNOON AND INTO THE EARLY EVENING HOURS. EXPECT BETTER COVERAGE POSSIBILITIES AT WESTERN TAF SITES WHERE ATMOSPHERE HAS HAD MORE TIME TO RECOVER HOWEVER STILL EXPECT THEM TO REMAIN SCATTERED IN NATURE. HARD TO TIME OUT WHEN EXACTLY A THUNDERSTORM WILL HIT A TAF SITE AND THEREFORE HAVE VCTS MENTION IN FOR NOW. WILL CONTINUE TO MONITOR AND PUT IN TSRA AS IT BECOMES APPROPRIATE. BELIEVE THAT ACTIVITY WILL BEGIN TO SETTLE DOWN AFTER SUNSET HOWEVER CLOUD COVER WILL STILL RESIDE ACROSS THE SITES. EVEN WITH CLOUD COVER BELIEVE THAT THERE WILL BE SOME FOG OVERNIGHT DUE TO AMOUNT OF LOW LEVEL MOISTURE. WITH MOIST UNSTABLE AIRMASS IN PLACE...EXPECT ADDITIONAL SHOWERS AND THUNDERSTORMS ACROSS THE TAF SITES FOR SUNDAY. .OUTLOOK...THUNDERSTORMS POSSIBLE THROUGH MONDAY EVENING. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...NONE. KY...NONE. IN...NONE. && SYNOPSIS...PARKER NEAR TERM...PARKER SHORT TERM...PARKER LONG TERM...SITES AVIATION...NOVAK
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE WILMINGTON OH 502 AM EDT SAT JUN 12 2010 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ053>056-060>065-070>074- 077>082-088-130915- WAYNE-FAYETTE IN-UNION IN-FRANKLIN IN-RIPLEY-DEARBORN-OHIO- SWITZERLAND-CARROLL-GALLATIN-BOONE-KENTON-CAMPBELL-OWEN-GRANT- PENDLETON-BRACKEN-ROBERTSON-MASON-LEWIS-CLARK-MADISON-FRANKLIN OH- LICKING-PREBLE-MONTGOMERY-GREENE-FAYETTE OH-PICKAWAY-FAIRFIELD- BUTLER-WARREN-CLINTON-ROSS-HOCKING-HAMILTON-CLERMONT-BROWN-HIGHLAND- ADAMS-PIKE-SCIOTO- 502 AM EDT SAT JUN 12 2010 ...FLASH FLOOD WATCH IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON... 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...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLASH FLOOD WATCH. AN UPPER LEVEL LOW PRESSURE SYSTEM WILL PRODUCE SHOWERS AND THUNDERSTORMS TODAY. A FEW OF THE STORMS MAY BE SEVERE WITH LARGE HAIL AND DAMAGING WINDS. IN ADDITION...LOCALLY HEAVY RAINFALL WILL BE POSSIBLE WITH THE THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. OHZ026-034-035-042>046-051-052-130915- HARDIN-MERCER-AUGLAIZE-DARKE-SHELBY-LOGAN-UNION OH-DELAWARE-MIAMI- CHAMPAIGN- 502 AM EDT SAT JUN 12 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL OHIO...MIAMI VALLEY OF OHIO AND WEST CENTRAL OHIO. .DAY ONE...TODAY AND TONIGHT. AN UPPER LEVEL LOW PRESSURE SYSTEM WILL PRODUCE SHOWERS AND THUNDERSTORMS TODAY. A FEW OF THE STORMS MAY BE SEVERE WITH LARGE HAIL AND DAMAGING WINDS. IN ADDITION...LOCALLY HEAVY RAINFALL WILL BE POSSIBLE WITH THE THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
142 PM EDT SAT JUN 12 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1120 AM FLASH FLOOD ROSS 39.31N 84.65W
06/12/2010 BUTLER OH EMERGENCY MNGR
WATER OVER MILLVILLE RD. NUMEROUS ROADS UNDER WATER
COUNTYWIDE.
&&
SNYDERSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
618 PM EDT SAT JUN 12 2010
KYZ095-096-122300-
GRANT KY-PENDLETON KY-
618 PM EDT SAT JUN 12 2010
...A STRONG THUNDERSTORM WILL AFFECT PENDLETON AND NORTHEASTERN GRANT
COUNTIES THROUGH 700 PM EDT...
AT 616 PM EDT...RADAR INDICATED A STRONG THUNDERSTORM NEAR GENE
SNYDER AIRPORT...MOVING SOUTHEAST AT 15 MPH.
WIND GUSTS TO 50 MPH AND UP TO DIME SIZE HAIL ARE POSSIBLE WITH THIS
STORM.
IN ADDITION...HEAVY RAIN CAN BE EXPECTED WITH THIS STORM...WITH AS
MUCH AS AN INCH OF RAIN IN LESS THAN AN HOUR.
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...BUTLER AND FALMOUTH.
ALSO...MOUNT AUBURN...MARCUS...CATAWBA...MORGAN AND MCKINNEYSBURG ARE
NEAR THE PATH OF THIS STRONG THUNDERSTORM.
WATER WILL POND ON ROADS AND MAY QUICKLY FILL ROADSIDE DITCHES AND
SMALL STREAMS.
LAT...LON 3878 8457 3880 8445 3881 8440 3882 8437
3885 8425 3857 8423 3855 8449The Cincinnati radar (KILN), 45 km away, was scanning. The volume nearest the first event began at 22:20 UTC.
5 thunderstorm wind, 4 flash flood, 4 flood, 1 lightning, 1 hail. Local standard time, as filed.
Trees and power poles were reported down due to damaging thunderstorm winds.
Trees were reported down due to damaging thunderstorm winds.
A tree and large tree limbs were reported down due to damaging thunderstorm winds.
A few trees were reported down due to damaging thunderstorm winds.
A 62 foot statue of Jesus burned to the ground after being struck by lightning.
Large tree limbs were reported down due to damaging thunderstorm winds.
Three feet of water was reported to be over Sater Street due to heavy rainfall.
High water was reported countywide. The worst flooding was in the Piqua area.
Numerous streets were flooded due to heavy rainfall.
High water was reported over roadways due to heavy rainfall.
High water was still reported over roadways due to previous flash flooding.
High water was still occurring over area roadways due to earlier flash flooding.
High water was still occurring on area roadways due to previous flash flooding.
High water was still occurring on area roadways due to previous flash flooding.
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: 230551, 230552, 230567, 230568, 230576, 230581, 230583, 231005, 231010, 231012, 231007, 231017, 231016, 231018, 231019.