Severe weather occurred during the morning and into the early afternoon hours of June 21st. The main threat was damaging thunderstorm winds.
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 occurred during the morning and into the early afternoon hours of June 21st. The main 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 Jun 21, 9:24 AM EST, 2 hours 14 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE WILMINGTON OH 1024 AM EDT MON JUN 21 2010 .SYNOPSIS... A WEAK WARM FRONT WILL EXTEND ACROSS THE AREA TODAY. IT WILL SHIFT NORTH INTO THE LOWER GREAT LAKES TONIGHT AND THEN REMAIN NEARLY STATIONARY THROUGH MID WEEK. THE FRONT WILL PUSH BACK SOUTH AS A COLD FRONT ON THURSDAY. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... SHOWERS ARE FIRING SOUTH OF THE WARM FRONT AND THE NAM12 WAS SHOWING A STRONG VORT CROSSING THE REGION IN A COUPLE OF HOURS. THIS IS HAPPENING NOW AND SHOULD BUTT INTO THE ESTABLISHED RIDGE AS MORE STORMS MOVE EAST AND NORTHEAST...REINFORCING THE RAIN OVER EAST CENTRAL INDIANA AND WEST CENTRAL OHIO THIS AFTERNOON. UPDATING TO BUMP POPS. NO CHANGE IN TEMPS AS YET. WILL SEE WHAT TYPE OF COLD POOL IS BEING LAID OUT AND RE-EVALUATE THE EXTENT OF THE RAINFALL IN ANOTHER FEW HOURS. PREV DISC BELOW... LINE OF CONVECTION ALONG WARM FRONT WILL SLOWLY MOVE EAST SOUTHEAST INTO CWA AFFECTING DARKE AND NORTHERN WAYNE COUNTIES EARLY TODAY. EXPECT THAT SURROUNDING AREA WILL ONLY SEE OUTFLOW AND WEAKER STORMS FROM THIS AS THE NOCTURNAL JET DISSIPATES EARLY THIS MORNING...REMOVING ANY SURGE OF MOISTURE THAT IS FEEDING THE STORMS ALONG THE BOUNDARY. MODELS WERE CONSISTENT WITH PUSHING THE MAIN BODY OF RAIN OVER WRN IN AND MUCH OF ILL TO THE NE AND LOWER GREAT LAKES REGION...ALBEIT A BIT SLOWER THAN WHAT WILL ACTUALLY OCCUR. I SEE THE NE PROGRESSION OF STORMS IN CENTRAL ILL...BUT AM CONCERNED ABOUT THE OUTFLOW FROM THE WEST CENTRAL IN STORMS AND HOW THEY MAY CONTINUE TO SPARK CONVECTION AS THEY HEAD EASTWARD AND INTO CWA. ESSENTIALLY RAISED THE CHANCE FOR SHOWERS AND THUNDERSTORMS... PARTICULARLY OVER THE NORTHWEST PORTION OF CWA TODAY. DID NOT THINK THAT THE FAR SOUTHERN EXTENT OF SHOWERS WOULD ACTUALLY GET THAT FAR SOUTH...ESPECIALLY WITH DYNAMICS MOVING PERPENDICULAR TO THIS TRACK. LOWERED MAX TEMPS IN THE NORTHWEST BY 2-4 DEGREES IN ANTICIPATION OF RAIN COOLED AIR AND CLOUD COVER. && .SHORT TERM /6 PM THIS EVENING THROUGH WEDNESDAY/... EXPECT ANY CONVECTION STILL ONGOING IN THE SOUTHERN ZONES TO DIMINISH QUICKLY DURING THE EVENING. THEN MORE STORMS SHOULD DEVELOP AND MOVE INTO THE NORTHERN HALF OF THE AREA AFTER 06Z AHEAD OF A FAIRLY SUBSTANTIAL SHORT WAVE. THESE SHOWERS AND THUNDERSTORMS SHOULD PERSIST INTO TUESDAY MORNING BEFORE HEADING OFF TO THE EAST. THE SYNOPTIC FRONT WILL BE WELL NORTH OF THE AREA...BUT CONVECTIVE OUTFLOW BOUNDARIES COULD RESULT IN ADDITIONAL STORMS JUST ABOUT ANYWHERE ACROSS THE FORECAST AREA TUESDAY AFTERNOON. THERE IS GENERAL AGREEMENT AMONGST THE MODELS THAT ACTIVITY WILL BE AT A MINIMUM ON TUESDAY NIGHT AND PERHAPS INTO WEDNESDAY AS MAIN FOCUS FOR CONVECTION WILL BE ACROSS THE GREAT LAKES. BUT CANNOT RULE OUT SOME OF THOSE SHOWERS AND THUNDERSTORMS AFFECTING THE NORTHERN ZONES. HEAT WILL BE BUILDING ALTHOUGH PERHAPS NOT AS AGGRESSIVELY AS THE GFS MOS WOULD SUGGEST. GENERALLY PREFERRED WARMER MOS LOWS AND COOLER MOS HIGHS. BASED ON THIS FORECAST...CONDITIONS COULD APPROACH HEAT ADVISORY CRITERIA BY WEDNESDAY. && .LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/... CHANCE OF SHOWERS AND THUNDERSTORMS WILL INCREASE ON WEDNESDAY NIGHT AND CONTINUE INTO THURSDAY AS A COLD FRONT PUSHES ACROSS THE AREA. THE FRONT IS FORECAST TO CLEAR THE SOUTHERN ZONES THURSDAY EVENING AS HIGH PRESSURE BUILD SOUTHEAST FROM THE GREAT LAKES TO THE ATLANTIC COAST. THIS WILL PROVIDE ONLY A MINOR RESPITE FROM WARM AND HUMID CONDITIONS AS TEMPERATURES REBOUND BACK INTO THE UPPER 80S TO LOWER 90S OVER THE WEEKEND. ANOTHER COLD FRONT APPROACHING FROM THE NORTH MAY BRING A CHANCE OF STORMS BY SUNDAY. && .AVIATION /15Z MONDAY THROUGH FRIDAY/... A WEAK WARM FRONT WILL DEVELOP AND MOVE SLOWLY NORTH TODAY. THUNDERSTORMS HAVE ALREADY DEVELOPED IN ILLINOIS AND INTO INDIANA. EXPECT THESE TO MOVE TOWARDS WESTERN PORTIONS OF OHIO TODAY WITH ADDITIONAL THUNDERSTORM DEVELOPMENT POSSIBLE AS WELL. BELIEVE BEST CHANCE OF THUNDERSTORMS WILL BE AT WESTERN TAF SITES AND THEREFORE HAVE VCTS MENTION AT KCVG...KLUK...AND KDAY. TAPERED OFF CHANCES TO THE EAST BY GOING VCSH AND CB AT KILN AND THEN NO MENTION AT THIS TIME OF THUNDERSTORM CHANCES DURING THE DAYTIME HOURS AT KCMH AND KLCK. ANOTHER COMPLEX OF STORMS WILL DEVELOP TONIGHT AND MAY IMPACT THE NORTHERN TAF SITES BY THE END OF THE TAF PERIOD. .OUTLOOK...THUNDERSTORMS POSSIBLE TUESDAY THROUGH THURSDAY. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...NONE. KY...NONE. IN...NONE. && SYNOPSIS... NEAR TERM...FRANKS SHORT TERM... LONG TERM... AVIATION...NOVAK
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE WILMINGTON OH 500 AM EDT MON JUN 21 2010 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-220900- 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- 500 AM EDT MON JUN 21 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. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
850 AM EDT MON JUN 21 2010
INZ050-OHZ042-211345-
WAYNE IN-DARKE OH-
850 AM EDT MON JUN 21 2010
...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN DARKE AND NORTHEASTERN
WAYNE COUNTIES THROUGH 945 AM EDT...
AT 847 AM EDT...RADAR INDICATED A STRONG THUNDERSTORM 7 MILES WEST OF
SHARPEYE...MOVING SOUTHEAST AT 20 MPH.
WIND GUSTS TO 40 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS STORM.
IN ADDITION...FREQUENT CLOUD TO GROUND LIGHTNING AND HEAVY RAIN CAN
BE EXPECTED WITH THIS STORM.
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...NEW MADISON...
GREENVILLE...ARCANUM AND BRADFORD.
ALSO...BETHEL...SHARPS CROSSING...WHITEWATER...SHARPEYE...
HOLLANSBURG...PALESTINE...WAYNE LAKES AND ABBOTTSVILLE ARE NEAR THE
PATH OF THIS STRONG THUNDERSTORM.
DO NOT STAY IN THE OPEN NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING
THREATENS. MOVE INDOORS WHEN A THUNDERSTORM APPROACHES. WATER WILL
POND ON ROADS AND MAY QUICKLY FILL ROADSIDE DITCHES AND SMALL
STREAMS.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT. IF THIS STORM BECOMES
STRONGER...THEN A WARNING MAY BE NEEDED.
LAT...LON 4002 8497 4002 8482 4019 8482 4015 8442
3993 8442 3992 8441 3992 8481 4001 8498SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
1037 AM EDT MON JUN 21 2010
INZ050-058-059-066-211530-
WAYNE IN-FAYETTE IN-UNION IN-FRANKLIN IN-
1037 AM EDT MON JUN 21 2010
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN FRANKLIN...
UNION...FAYETTE AND WAYNE COUNTIES THROUGH 1130 AM EDT...
AT 1032 AM EDT...RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE
EXTENDING FROM 15 MILES NORTHWEST OF FRANKLIN TO 7 MILES WEST OF
FALMOUTH TO 21 MILES WEST OF ANDERSONVILLE...MOVING EAST AT 30 MPH.
WIND GUSTS TO 40 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THESE
STORMS.
IN ADDITION...FREQUENT CLOUD TO GROUND LIGHTNING AND HEAVY RAIN CAN
BE EXPECTED WITH THESE STORMS.
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...DUBLIN...CAMBRIDGE
CITY...HAGERSTOWN...CONNERSVILLE...CENTERVILLE...FOUNTAIN CITY...WEST
COLLEGE CORNER...LIBERTY...BROOKVILLE AND RICHMOND.
ALSO...FALMOUTH...BENTONVILLE...GLENWOOD...MOUNT AUBURN...FRANKLIN...
EAST GERMANTOWN...BEESONS AND BUNKER HILL ARE NEAR THE PATH OF THESE
LINE OF STRONG THUNDERSTORMS.
DO NOT STAY IN THE OPEN NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING
THREATENS. MOVE INDOORS WHEN THUNDERSTORMS APPROACH. WATER WILL POND
ON ROADS AND MAY QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT. IF THESE STORMS BECOME
STRONGER...THEN A WARNING MAY BE NEEDED.
LAT...LON 3979 8531 3980 8523 3986 8523 3991 8521
4001 8521 4002 8483 4002 8482 3956 8482
3939 8498 3938 8531SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
1132 AM EDT MON JUN 21 2010
OHZ070-071-077-078-211615-
CLERMONT OH-HAMILTON OH-BUTLER OH-WARREN OH-
1132 AM EDT MON JUN 21 2010
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT WESTERN WARREN...
EASTERN BUTLER...NORTHEASTERN HAMILTON AND NORTHWESTERN CLERMONT
COUNTIES THROUGH 1215 PM EDT...
AT 1128 AM EDT...RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE
EXTENDING FROM JACKSONBURG TO HAMILTON TO MOUNT HEALTHY...MOVING EAST
AT 15 MPH.
WIND GUSTS TO 50 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THESE
STORMS.
IN ADDITION...FREQUENT CLOUD TO GROUND LIGHTNING AND HEAVY RAIN CAN
BE EXPECTED WITH THESE STORMS.
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...FINNEYTOWN...
SPRINGDALE...WYOMING...TRENTON...READING...SOUTH MIDDLETOWN...
SHARONVILLE...DEER PARK...MIDDLETOWN...BLUE ASH...MONROE AND
MONTGOMERY.
ALSO...WOODLAWN...MAUSTOWN...GLENDALE...LINCOLN HEIGHTS...LOCKLAND...
ARLINGTON HEIGHTS...BECKETT RIDGE AND EVENDALE ARE NEAR THE PATH OF
THESE LINE OF STRONG THUNDERSTORMS.
DO NOT STAY IN THE OPEN NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING
THREATENS. MOVE INDOORS WHEN THUNDERSTORMS APPROACH. WATER WILL POND
ON ROADS AND MAY QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT. IF THESE STORMS BECOME
STRONGER...THEN A WARNING MAY BE NEEDED.
LAT...LON 3957 8462 3957 8448 3958 8447 3959 8425
3936 8426 3918 8424 3921 8462PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
1218 PM EDT MON JUN 21 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1203 PM HEAVY RAIN NAPOLEON 39.21N 85.33W
06/21/2010 M1.40 INCH RIPLEY IN TRAINED SPOTTER
30 MINUTE DURATION
&&
CTSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
1225 PM EDT MON JUN 21 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1159 AM HEAVY RAIN HAMILTON 39.39N 84.56W
06/21/2010 M1.00 INCH BUTLER OH TRAINED SPOTTER
35 MINUTE DURATION. LOCATED IN RILEY TWP.
1212 PM HEAVY RAIN 6 SSW FAIRFIELD 39.26N 84.59W
06/21/2010 M1.50 INCH HAMILTON OH TRAINED SPOTTER
1 HOUR DURATION.
&&
CTSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
1229 PM EDT MON JUN 21 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1151 AM TSTM WND DMG MIDDLETOWN 39.51N 84.37W
06/21/2010 BUTLER OH PUBLIC
LARGE TREE BRANCHES DOWNED.
&&The Cincinnati radar (KILN), 100 km away, was scanning. The volume nearest the first event began at 16:36 UTC.
4 thunderstorm wind. Local standard time, as filed.
Two trees were reported down due to damaging thunderstorm winds.
Trees were reported down due to damaging thunderstorm winds.
Roof damage occurred at Kincaid Lake State Park. Several trees were also reported down in this area.
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 Kentucky in 2010Every state in 2010This day in weather historyWarnings in Kentucky, 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: 231090, 231091, 231093, 231094.