Showers and thunderstorms moving over the area caused flash flooding in some locations.
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.
Showers and thunderstorms moving over the area caused flash flooding in some locations.
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 Apr 19, 5:39 AM EST, 2 hours 16 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE WILMINGTON OH 639 AM EDT TUE APR 19 2011 .SYNOPSIS... SHOWERS AND THUNDERSTORMS WILL ACCOMPANY A WARM FRONT AS IT LIFTS SLOWLY NORTHWARD THROUGH OHIO TODAY. A STRONG COLD FRONT CONTAINING ABUNDANT MOISTURE WILL CROSS THE REGION LATE TONIGHT INTO WEDNESDAY. HIGH PRESSURE AND DRIER AIR WILL BUILD IN WEDNESDAY NIGHT AND THURSDAY. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... SHOWERS AND THUNDERSTORMS HAVE DEVELOPED ALONG A WARM FRONT LOCATED JUST SOUTH OF THE OHIO RIVER AIDED BY A STRENGTHENING LOW LEVEL JET. THE SHOWERS AND THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS THE AREA THIS MORNING. SINCE MOST OF THE STORMS ARE FORMING IN AN AREA OF ELEVATED INSTABILITY AND STRONG WINDS APPEAR TO BE STAYING ALOFT...LARGE HAIL IS THE MAIN THREAT AT THIS POINT. HAVE ISSUED A FEW WARNINGS FOR A PERSISTENT CELL EAST OF CINCINNATI THAT HAS PRODUCED HAIL UP TO 1 INCH IN DIAMETER. HEAVY RAIN WILL ALSO OCCUR AND LOCALIZED FLOODING MAY RESULT. EXPECT SHOWERS AND THUNDERSTORMS TO DIMINISH IN COVERAGE BY AFTERNOON AS FRONTAL CONVERGENCE LIFTS NORTH AND THE LOW LEVEL JET BRIEFLY RELAXES. TEMPERATURES WILL WARM SIGNIFICANTLY AS THE WARM FRONT MOVES NORTH...WITH HIGHS RANGING FROM AROUND 60 FAR NORTH TO THE MID 70S SOUTH. && .SHORT TERM /6 PM THIS EVENING THROUGH THURSDAY/... A STRONG COLD FRONT EXTENDING FROM A GREAT LAKES LOW WILL CROSS THE AREA TONIGHT INTO EARLY WEDNESDAY. ALL MODELS INDICATE A SWATH OF ABUNDANT MOISTURE AND CONVERGENCE ALONG THE FRONT SO WENT WITH 100 POPS FOR SHOWERS AND THUNDERSTORMS. EXPECT A SQUALL LINE TO DEVELOP AHEAD OF THE FRONT ENERGIZED BY A 60 KNOT 850 MB JET. SEVERE WIND GUSTS WILL PROBABLY ACCOMPANY THE SQUALL LINE...WITH ISOLATED TORNADOES POSSIBLE ALONG BROKEN SEGMENTS OF THE LINE. DECREASING INSTABILITY DURING THE NIGHT MAY BE A LIMITING FACTOR TO THE SEVERE WEATHER THREAT AS THE SQUALL LINE PROGRESSES TO EASTERN COUNTIES. PRECIPITABLE WATER OVER 200% OF NORMAL WILL RESULT IN HEAVY RAIN AND LOCALIZED FLOODING. THE COLD FRONT WILL PROCEED QUICKLY EASTWARD ON WEDNESDAY...FOLLOWED BY HIGH PRESSURE AND DRY AIR ON WEDNESDAY NIGHT. ALSO KEPT THURSDAY DRY SINCE IT APPEARS MOISTURE ASSOCIATED WITH THE NEXT WAVE OF LOW PRESSURE WILL REMAIN SOUTHWEST THROUGH THE DAY. CLOUDS...PRECIPITATION AND COLD ADVECTION SHOULD KEEP HIGH TEMPERATURES MAINLY IN THE 50S AND 60S ON WEDNESDAY AND THURSDAY. && .LONG TERM /THURSDAY NIGHT THROUGH MONDAY/... UNSETTLED CONDITIONS WILL BECOME REESTABLISHED ACROSS THE OHIO VALLEY THROUGH THE PERIOD. A WARM FRONT WILL DEVELOP ON THURSDAY NIGHT AND LIFT NORTH ON FRIDAY. AS LOW PRESSURE PASSES TO THE NORTH IT WILL BRING A COLD FRONT THROUGH LATE FRIDAY NIGHT OR EARLY SATURDAY. IT APPEARS THAT THIS FRONT WILL STALL JUST SOUTH OF THE REGION AND THEN LIFT BACK NORTH AS WEAK WAVES MOVE ALONG THE BOUNDARY AT THE BEGINNING OF THE WEEK. COOLER TEMPERATURES ON THURSDAY AND THURSDAY NIGHT WILL BE REPLACED BY NEAR TO ABOVE NORMAL READINGS FOR THE REST OF THE PERIOD. && .AVIATION /12Z TUESDAY THROUGH SATURDAY/... A SFC FRONTAL BOUNDARY SOUTH OF ALL TAF SITES TO REMAIN QUASI- STATIONARY EARLY TODAY...BEFORE MOVING BACK NORTH AS A WARM FRONT THIS AFTN. SHOWERS AND THUNDERSTORMS HAVE DEVELOPED GENERALLY ALONG AND NORTH OF THIS FRONT IN A REGION OF MOIST ASCENT DUE TO A STRONG LOW LEVEL JET. THESE SHOWERS AND EMBEDDED THUNDERSTORMS WILL WILL SHIFT EAST AND DIMINISH BY MID MORNING. PCPN MAY BECOME MODERATE TO LOCALLY HEAVY AT TIMES...WITH CIGS AND VSBYS DROPPING INTO THE IFR CATEGORY. AFTER THE LOW LEVEL JET SHIFTS OFF TO THE EAST DURG THE FRONTAL BOUNDARY WILL MAKE ITS WAY FROM SOUTH TO NORTH AS LOW PRESSURE BEGINS TO DEEPEN TO THE WEST. MVFR/IFR CIGS TO SLOWLY IMPROVE TO VFR BEHIND WARM FRONTAL PASSAGE FROM SOUTH TO NORTH. DEEPENING LOW PRESSURE EJECTS FROM THE MID MS VALLEY INTO THE GREAT LAKES TONIGHT SENDING A STRONG COLD FRONT THROUGH THE REGION BETWEEN 09Z AND 12Z WED. THIS WILL BRING ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS...SOME OF WHICH COULD BE STRONG TO SEVERE. AT THIS TIME HAVE RE-INTRODUCED THUNDERSTORMS WITH MVFR CIGS/VSBYS BUT IFR CONDITIONS WL BE POSSIBLE IN SOME OF THE STRONGER STORMS. WINDS WILL SHIFT TO THE WEST TOWARD SUNRISE WEDNESDAY WITH GUSTS UP TO 28KTS POSSIBLE. OUTLOOK...MVFR/IFR CIGS/VSBYS POSSIBLE WEDNESDAY MORNING IN SHOWERS AND THUNDERSTORMS. GUSTY WEST TO NORTHWEST WINDS EXPECTED ON WEDNESDAY. SHOWERS AND THUNDERSTORMS EXPECTED FRIDAY INTO SATURDAY. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...NONE. KY...NONE. IN...NONE. && SYNOPSIS...CONIGLIO NEAR TERM...CONIGLIO SHORT TERM...CONIGLIO LONG TERM... AVIATION...AR
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE WILMINGTON OH 502 AM EDT TUE APR 19 2011 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-200915- 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- 502 AM EDT TUE APR 19 2011 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. SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY. A FEW STORMS MAY PRODUCE HAIL. IN ADDITION...LOCALLY HEAVY RAIN MAY OCCUR...ESPECIALLY WHERE STORMS ARE TRAINING. THIS MAY RESULT IN LOCALIZED FLOODING. THE POTENTIAL EXISTS FOR A WELL ORGANIZED SQUALL LINE TO DEVELOP TO OUR WEST AND TRACK ACROSS THE AREA TONIGHT. THE MAIN THREAT WILL BE DAMAGING WINDS AND ISOLATED TORNADOES. HEAVY RAIN AND FLOODING WILL ALSO BE POSSIBLE WITH THE SQUALL LINE. CHECK THE LATEST FORECAST FOR UPDATED INFORMATION. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. THE SEVERE WEATHER THREAT WILL CONTINUE EARLY WEDNESDAY AS THE COLD FRONT MOVES EAST. THE THREAT WILL DIMINISH BY WEDNESDAY AFTERNOON AS HIGH PRESSURE MOVES IN BEHIND THE FRONT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
345 AM EDT TUE APR 19 2011
KYZ092-093-OHZ071-077>079-190845-
KENTON KY-CAMPBELL KY-BROWN OH-HAMILTON OH-WARREN OH-CLERMONT OH-
345 AM EDT TUE APR 19 2011
...A STRONG THUNDERSTORM WILL AFFECT CLERMONT...SOUTHERN WARREN...
EASTERN HAMILTON...NORTHWESTERN BROWN...CAMPBELL AND KENTON COUNTIES
THROUGH 445 AM EDT...
AT 340 AM EDT...RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS
OVER THE CINCINNATI METRO AREA...MOVING NORTHEAST AT 55 MPH.
THESE STORMS HAVE THE POTENTIAL TO PRODUCE ONE HALF INCH DIAMETER
HAIL. IN ADDITION...HEAVY RAIN CAN BE EXPECTED WITH THESE STORMS.
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...SHARONVILLE...
WITHAMSVILLE...BLUE ASH...TERRACE PARK...AMELIA...MONTGOMERY...
MILFORD...BATAVIA...LOVELAND...WILLIAMSBURG...MORROW AND MOUNT ORAB.
ALSO...MOUNT CARMEL...THE VILLAGE OF INDIAN HILLS...LINDALE...
SUMMERSIDE...NICHOLSVILLE...WILLOWVILLE...MIAMIVILLE AND PERINTOWN
ARE NEAR THE PATH OF THIS STRONG THUNDERSTORM.
WATER WILL POND ON ROADS AND MAY QUICKLY FILL ROADSIDE DITCHES AND
SMALL STREAMS.
LAT...LON 3889 8443 3922 8457 3930 8438 3929 8436
3931 8435 3942 8407 3928 8400 3926 8400
3925 8399 3901 8387SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON OH 411 AM EDT TUE APR 19 2011 KYZ097-099-OHZ079-081-190915- MASON KY-BRACKEN KY-ADAMS OH-BROWN OH- 411 AM EDT TUE APR 19 2011 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN BROWN...WESTERN ADAMS...NORTHEASTERN BRACKEN AND NORTHWESTERN MASON COUNTIES THROUGH 515 AM EDT... AT 406 AM EDT...RADAR INDICATED A STRONG THUNDERSTORM NEAR MINERVA... MOVING NORTHEAST AT 55 MPH. THIS STORM IS CAPABLE OF PRODUCING ONE HALF INCH DIAMETER HAIL. IN ADDITION...HEAVY RAIN CAN BE EXPECTED WITH THIS STORM. SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...WEST UNION AND SEAMAN. ALSO...REDOAK...BRADYSVILLE...DECATUR...BENTONVILLE AND CHERRY FORK ARE NEAR THE PATH OF THIS STRONG THUNDERSTORM. WATER WILL POND ON ROADS AND MAY QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. LAT...LON 3897 8357 3872 8343 3866 8393 3875 8398
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON OH 446 AM EDT TUE APR 19 2011 OHZ073-079>082-088-190945- ADAMS OH-BROWN OH-PIKE OH-ROSS OH-SCIOTO OH-HIGHLAND OH- 446 AM EDT TUE APR 19 2011 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN HIGHLAND... NORTHWESTERN SCIOTO...SOUTHWESTERN ROSS...WESTERN PIKE...EXTREME EASTERN BROWN AND NORTHERN ADAMS COUNTIES THROUGH 545 AM EDT... AT 441 AM EDT...RADAR INDICATED A STRONG THUNDERSTORM NEAR EMERALD... MOVING NORTHEAST AT 50 MPH. THIS STORM WILL PRODUCE ONE HALF INCH DIAMETER HAIL. IN ADDITION...HEAVY RAIN CAN BE EXPECTED WITH THIS STORM. SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...PEEBLES...MARSHALL... CYNTHIANA...KINCAID SPRINGS...PIKE LAKE AND BAINBRIDGE. ALSO...BERRYSVILLE...LOCUST GROVE...ROCKY FORK LAKE...SMOKY CORNERS...SINKING SPRING...RARDEN...POPLAR GROVE AND ELM GROVE ARE NEAR THE PATH OF THIS STRONG THUNDERSTORM. WATER WILL POND ON ROADS AND MAY QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. LAT...LON 3932 8316 3890 8313 3883 8371 3910 8371
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
826 AM EDT TUE APR 19 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0643 AM TSTM WND DMG 5 W ALEXANDRIA 38.97N 84.48W
04/19/2011 KENTON KY LAW ENFORCEMENT
TREE DOWN ON KLETTE RD NEAR MARSHALL RD.
&&
KURZPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE WILMINGTON OH
829 AM EDT TUE APR 19 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0243 AM TSTM WND DMG 5 W ALEXANDRIA 38.97N 84.48W
04/19/2011 KENTON KY LAW ENFORCEMENT
TREE DOWN ON KLETTE RD NEAR MARSHALL RD.
&&
KURZPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
834 AM EDT TUE APR 19 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0832 AM HEAVY RAIN 5 NW MILLVILLE 39.44N 84.72W
04/19/2011 M1.70 INCH BUTLER OH TRAINED SPOTTER
&&
ASLThe Cincinnati radar (KILN), 117 km away, was scanning. The volume nearest the first event began at 12:56 UTC.
1 flash flood, 1 flood, 1 heavy rain. Local standard time, as filed.
Water was rushing over roadways due to heavy rainfall.
Water was reported over roadways due to heavy rainfall.
Basements were flooded due to heavy rainfall.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2011Every state in 2011This day in weather historyWarnings in Indiana, April 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: 293973, 293983, 293985.