Severe thunderstorms developed ahead of a surface low pressure system and were enhanced by energy from an upper level shortwave.
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 thunderstorms developed ahead of a surface low pressure system and were enhanced by energy from an upper level shortwave.
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 30, 12:27 PM EST, 1 hour 5 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE WILMINGTON OH 127 PM EDT TUE JUN 30 2015 .SYNOPSIS... A SURFACE LOW WILL TRACK TO THE LOWER GREAT LAKES FROM THE WESTERN GREAT LAKES REGION TODAY. AT THE SAME TIME...THE AXIS OF AN UPPER LOW WILL SLIDE EAST THROUGH THE GREAT LAKES AND OHIO VALLEY THIS AFTERNOON AND EVENING. WEAK SURFACE HIGH PRESSURE WILL THEN SETTLE OVER THE REGION WEDNESDAY INTO THURSDAY...WITH A LOW CUTTING EAST THROUGH THE SOUTHERN OHIO AND TENNESSEE VALLEYS ON THURSDAY AND THURSDAY NIGHT. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... MORNING UPDATE GENERALLY ATTEMPTED TO TIME THE SHOWERS IN CENTRAL OHIO OUT OF THE CWA AND TO NOSE THE AREA OF SHOWERS IN WEST CENTRAL OHIO INTO THE CWA. UPSTREAM CONVECTIVE COMPLEX HAS LOST THE DEEP CONVECTION AND SUBSEQUENT ELECTRICAL ACTIVITY BUT HAS SPARKED SHOWERS OVER A BROADER AREA TO THE WEST OF I-75 AND N OF I-70. THESE SHOWERS LOOK TO BE TRACKING JUST SOUTH OF EAST AND MODELS ARE SLOW IN THE INITIATION OF STORMS TODAY BUT INDICATE A RAPID EXPANSION ACROSS THE REGION AS SUN HELPS DESTABILIZE THE BOUNDARY LAYER. BLENDED THE EARLIER ONSET OF SHOWERS TO THE CURRENT FORECAST WHICH IS STILL ON TRACK. PREV DISC BELOW... THE FORECAST FOCUS GOING INTO THE AFTERNOON WILL BE ON THE POTENTIAL FOR THUNDERSTORM DEVELOPMENT. POPS WERE LARGELY BASED ON SPC-WRF AND NCAR ENSEMBLE SIMULATED REFLECTIVITY PROJECTIONS...SPREADING LIKELY POPS ACROSS THE CWA FROM NORTHWEST TO SOUTHEAST BETWEEN 18Z AND 00Z. THIS REGION WILL BE AHEAD OF THE UPPER TROUGH AXIS...IN A FAVORABLE AREA OF LIFT. ALTHOUGH THE SURFACE PRESSURE PATTERN IS KIND OF A MESS...THERE DOES SEEM TO BE A WEAK BOUNDARY MOVING SOUTHEAST INTO THE ILN FORECAST AREA...WITH CONVERGENT FLOW ALSO HELPING TO PROVIDE FORCING FOR STORM DEVELOPMENT. WITH COOLER AIR MOVING IN ALOFT...THANKS TO THE UPPER TROUGH...MID-LEVEL LAPSE RATES WILL BE STEEPING SLIGHTLY. EVEN THOUGH NEAR-SURFACE CONDITIONS WILL NOT BE ESPECIALLY MOIST OR WARM...INSTABILITY SHOULD BE ABLE TO BUILD FAIRLY WELL...UP TO AROUND 1500 J/KG OF SBCAPE. LOOKING UPSTREAM EARLY THIS MORNING...SOME THUNDERSTORM CELLS MOVING INTO INDIANA ARE AN INDICATION OF ELEVATED INSTABILITY...WHICH FURTHER SUGGESTS THAT DIURNAL HEATING WILL BE ABLE TO GENERATE SOME ENERGY OUT OF THIS AIRMASS. WIND SHEAR IS FORECAST TO BE MARGINAL...PRIMARILY UNIDIRECTIONAL FROM THE WEST...AND PERHAPS AROUND 15-25 KNOTS THROUGH A 6KM LAYER. THUS...THE INGREDIENTS ARE EXPECTED TO BE IN PLACE FOR A LOW-END SEVERE EVENT ACROSS THE FORECAST AREA. TIMING SHOULD BE MAINLY DIURNAL...WITH A THREAT FOR WIND AND HAIL. HOWEVER...THE EXPECTED INSTABILITY AND SHEAR ARE SIMPLY NOT EXPECTED TO BE APPRECIABLE ENOUGH FOR A SIGNIFICANT OR WIDESPREAD EVENT. SINCE THE OVERALL FOCUS IS NOT PARTICULARLY WELL-DEFINED...AND ENVIRONMENTAL CONDITIONS WILL BE SIMILAR ACROSS THE REGION...CHANCES FOR STRONG STORMS DO NOT APPEAR SIGNIFICANTLY DIFFERENT FROM ONE SECTION OF THE CWA TO ANOTHER. HOWEVER...IF RECENT HRRR RUNS ARE CORRECT (AND STORMS MOVE THROUGH A LITTLE FASTER THAN CURRENTLY FORECAST)...THE CHANCES FOR STRONGER STORMS MAY SHIFT SLIGHTLY SOUTH AND EAST. CLOUDS SHOULD BREAK ENOUGH TO ALLOW SOME INSOLATION FOR MOST LOCATIONS IN THE CWA TODAY...THOUGH CENTRAL OHIO MAY STAY IN THE CLOUDS A LITTLE LONGER THAN ELSEWHERE. THUS...A NNE-TO-SSW TEMPERATURE GRADIENT WAS EMPLOYED IN THE GRIDS...WITH MID TO UPPER 70S IN THE NORTHERN/NORTHEASTERN CWA...AND LOWER 80S IN THE FAR SOUTH. && .SHORT TERM /6 PM THIS EVENING THROUGH FRIDAY/... WITH THE AXIS OF THE UPPER LEVEL TROUGH CROSSING THE MIDDLE OHIO VALLEY ON FRIDAY EVENING...FAVORABLE CONDITIONS FOR ASCENT WILL QUICKLY COME TO AN END...AND PRECIPITATION SHOULD DIMINISH FROM NORTHWEST TO SOUTHEAST ACROSS THE FORECAST AREA. UPPER FLOW WILL REMAIN GENERALLY NORTHWESTERLY OVER THE REGION THROUGH THE REST OF THE WEEK...AND THOUGH THERE IS GENERAL AGREEMENT IN THE ARRANGEMENT OF THE SURFACE PATTERN THROUGH FRIDAY...THE EXACT LATITUDINAL ALIGNMENT WILL HAVE A BIG ROLE IN THUNDERSTORM CHANCES (ESPECIALLY ON THURSDAY). DRY CONDITIONS ARE EXPECTED TONIGHT AND THROUGH THE DAY ON WEDNESDAY...AS SURFACE HIGH PRESSURE BEGINS TO BUILD IN OVER THE GREAT LAKES REGION. 925MB/850MB TEMPERATURES WILL COOL BY ONE OR TWO DEGREES CELSIUS FROM TUESDAY TO WEDNESDAY...BUT WITH CLOUD COVER EXPECTED TO BE FAIRLY LIMITED...TEMPERATURES SHOULD STILL RISE TO SIMILAR VALUES AS ON TUESDAY. WITH FORECAST HIGHS IN THE MIDDLE 70S TO AROUND 80...CONDITIONS WILL REMAIN ABOUT FIVE DEGREES BELOW CLIMATOLOGICAL NORMALS. AS THE GREAT LAKES SURFACE HIGH GROWS IN SIZE HEADED INTO THURSDAY...ITS EVENTUAL MOVEMENT WILL DETERMINE HOW FAR SOUTH A FRONTAL BOUNDARY AND CONVERGENT ZONE WILL SET UP FROM WEDNESDAY NIGHT THROUGH FRIDAY. THIS WILL BE AN IMPORTANT QUESTION...AS MODELS HAVE CONSISTENTLY SHOWN THAT CONVECTION WILL BE LIKELY ALONG THIS BOUNDARY...PERHAPS WITH ONE OR MORE CONVECTIVE SYSTEMS MOVING IN THE QUICK WESTERLY FLOW ALOFT. IN GENERAL...THE LAST 12 HOURS OF MODEL RUNS HAVE FAVORED A SLIGHT SHIFT TO A SOUTHWARD SOLUTION...SETTLING STORMS ACROSS THE SOUTHERN HALF OF THE OHIO VALLEY. SOME CHANGES WERE NECESSARY TO THE POP GRIDS THROUGH THIS TIME FRAME...SIGNIFICANTLY LIMITING CONVECTIVE CHANCES IN THE NORTHERN HALF OF THE CWA...WHILE STILL ALLOWING A CHANCE FOR CONVECTION (ESPECIALLY IN THE SOUTHERN HALF) ON THURSDAY. WITH THIS BOUNDARY SETTING UP SOUTH OF THE CWA...TEMPERATURES SHOULD REMAIN SLIGHTLY BELOW NORMAL THROUGH THE FORECAST PERIOD. && .LONG TERM /FRIDAY NIGHT THROUGH MONDAY/... MID/UPPER LEVEL TROUGH WILL PERSIST ACROSS THE EASTERN UNITED STATES INTO EARLY NEXT WEEK AS THE WEST COAST RIDGE AXIS SHIFTS VERY SLOWLY EASTWARD. THERE ARE SOME MODEL DISCREPANCIES WITH THE NORTHWARD EXTENT OF THE SHORT WAVE ENERGY MOVING THROUGH THE TROUGH ON THURSDAY. AS A RESULT...HAVE STUCK CLOSE TO THE MODEL BLEND/CURRENT FORECAST WITH THIS...RANGING POPS FROM LOW CHANCE NORTH TO LIKELY IN THE FAR SOUTH. ON THE BACK SIDE OF THIS SHORT WAVE...WE SHOULD GET INTO A PCPN MINIMUM FOR THURSDAY NIGHT INTO FRIDAY MORNING. HEADING INTO THE WEEKEND AND EARLY NEXT WEEK...IT BECOMES MORE DIFFICULT TO TIME/PLACE SHORT WAVE ENERGY IN THE TROUGHY PATTERN. WILL THEREFORE MAINTAIN SOME LOWER CHANCE POPS THROUGH THE REMAINDER OF THE LONG TERM PERIOD. WITH THE TROUGH IN PLACE ACROSS THE REGION...TEMPERATURES WILL REMAIN AT OR SLIGHTLY BELOW SEASONABLE NORMALS. EXPECT AFTERNOON HIGHS IN THE UPPER 70S TO LOWER 80S. && .AVIATION /17Z TUESDAY THROUGH SATURDAY/... CONVECTION IS FIRING ALONG AND AHEAD OF THE UPPER TROUGH AND IS EXPECTED TO DECREASE WITH THE END OF DAYTIME HEATING. BKN VFR TO OCCASIONALLY MVFR CLOUDS WILL SCATTER OUT THIS EVENING WITH FOG DEVELPING TOWARDS DAYBREAK ALONG WITH SOME LIFR CIGS AT KCVG/KLUK AND POSSIBLY KILN. SKIES SHOULD LIFT AND SCATTER TOMORROW MORNING IN A LESS FAVORABLE AIRMASS FOR THUNDERSTORM DEVELOPMENT. OUTLOOK...THUNDERSTORMS POSSIBLE WEDNESDAY NIGHT INTO THURSDAY AND AGAIN FRIDAY NIGHT INTO SATURDAY. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...NONE. KY...NONE. IN...NONE. && SYNOPSIS...FRANKS NEAR TERM...FRANKS SHORT TERM...HATZOS LONG TERM...JGL AVIATION...FRANKS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE WILMINGTON OH 801 AM EDT TUE JUN 30 2015 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-011215- 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- 801 AM EDT TUE JUN 30 2015 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 TO DEVELOP THIS AFTERNOON. A FEW STORMS MAY BECOME STRONG TO SEVERE...WITH A CHANCE FOR DAMAGING WINDS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. 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
213 PM EDT TUE JUN 30 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0211 PM HAIL 2 SW GAHANNA 40.00N 82.90W
06/30/2015 M0.50 INCH FRANKLIN OH TRAINED SPOTTER
&&
MYRONPSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
213 PM EDT TUE JUN 30 2015
OHZ073-074-301845-
HOCKING OH-ROSS OH-
213 PM EDT TUE JUN 30 2015
...A STRONG THUNDERSTORM WILL AFFECT CENTRAL ROSS AND SOUTHWESTERN
HOCKING COUNTIES THROUGH 245 PM EDT...
AT 210 PM EDT...RADAR INDICATED A STRONG THUNDERSTORM NEAR
CHILLICOTHE...MOVING EAST AT 25 MPH.
STORM HAZARDS INCLUDE...
WINDS TO 40 MPH...
ONE HALF INCH DIAMETER HAIL...
THE STRONG THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF CENTRAL
ROSS AND SOUTHWESTERN HOCKING COUNTIES...INCLUDING MOORESVILLE...
HALLSVILLE...ADELPHI AND SOUTH BLOOMINGVILLE.
LAT...LON 3937 8256 3937 8263 3936 8264 3936 8274
3927 8276 3929 8321 3939 8321 3943 8307
3947 8278 3947 8274 3948 8274 3950 8259PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
217 PM EDT TUE JUN 30 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0209 PM FLOOD TERRACE PARK 39.16N 84.31W
06/30/2015 HAMILTON OH AMATEUR RADIO
FLOODING OCCURING ON US RTE 50. TRAFFIC IS BLOCKED.
&&
MYRONPSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
219 PM EDT TUE JUN 30 2015
OHZ056-301845-
LICKING OH-
219 PM EDT TUE JUN 30 2015
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT LICKING COUNTY THROUGH
245 PM EDT...
AT 217 PM EDT...RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE
EXTENDING FROM ST. LOUISVILLE TO PATASKALA...MOVING EAST AT 25 MPH.
STORM HAZARDS INCLUDE...
WINDS TO 40 MPH...
ONE HALF INCH DIAMETER HAIL...
SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...GRANVILLE...BUCKEYE
LAKE...NEWARK AND HEATH.
ALSO...ST. LOUISVILLE...KIRKERSVILLE...GRANVILLE SOUTH...PURITY...
HEBRON...TOBOSO...BROWNSVILLE...FALLSBURG...HARBOR HILLS AND HANOVER
ARE NEAR THE PATH OF THIS LINE OF STRONG THUNDERSTORMS.
LAT...LON 3994 8221 3994 8223 3992 8223 3994 8278
3999 8277 4025 8244 4024 8219 4024 8218
4014 8218PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
225 PM EDT TUE JUN 30 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0209 PM FLOOD 6 SE DEER PARK 39.15N 84.32W
06/30/2015 HAMILTON OH BROADCAST MEDIA
FLOODING ON ROUTE 50 NEAR TERRACE PARK. TRAFFIC IS
BLOCKED.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
226 PM EDT TUE JUN 30 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0220 PM HEAVY RAIN COVEDALE 39.12N 84.64W
06/30/2015 M1.75 INCH HAMILTON OH AMATEUR RADIO
1.75 INCHES OF RAIN FELL IN 45 MINUTES.
&&The Cincinnati radar (KILN), 94 km away, was scanning. The volume nearest the first event began at 18:30 UTC.
4 thunderstorm wind, 2 hail. Local standard time, as filed.
Several large branches knocked down near Camp Ernst on Hathaway Road.
One tree was snapped.
A small tree was snapped in half.
Several trees were downed across the Morning View area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Kentucky in 2015Every state in 2015This day in weather historyWarnings in Kentucky, June 2015
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: 585817, 585818, 585819, 585815, 585820, 585816.