Scattered thunderstorms developed across the area as an upper level disturbance moved through the Great Lakes region.
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.
Scattered thunderstorms developed across the area as an upper level disturbance moved through the Great Lakes region.
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 10, 10:29 AM EST, 45 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Wilmington OH 1129 AM EDT Fri Jul 10 2020 .SYNOPSIS... Showers and thunderstorms will occur ahead of a weak cold front today. Another front will move across the region on Sunday. This will result in temperatures falling a bit below normal for the weekend into early next week. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... Showers and thunderstorms have developed ahead of a cold front that will move through the region today. Expect coverage of thunderstorm activity to increase for the afternoon hours. With DCAPE values of over 800 there will be the potential for isolated damaging wind gusts as these storms move through. Will add this mention to the HWO. Storms today will be much more progressive than the past several days, however brief heavy downpours will be possible. The highest temperatures today will be across eastern portions of the forecast area where it will take longer for the front to reach. A few heat index values in the middle to upper 90s will be possible across eastern portions of the forecast area as well. Winds will gust at times today, especially after the passage of the frontal boundary. Outside of thunderstorm activity these wind gusts will generally be in the 20 to 30 mph range. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SATURDAY/... Showers and a few thunderstorms may linger into the evening, particularly in central Ohio as the short wave strengthens and closes off as it continues its trek into eastern Ohio and western Pennsylvania. Besides precipitation chances, response at the surface will be for a relatively tight pressure gradient keeping winds up overnight, which will linger into Saturday with some gusty winds. Clouds will gradually clear overnight as low level flow become anticyclonic. Weak warm air advection will commence on Saturday afternoon and cannot rule out a few showers developing from this forcing, although probability looks low at this time. Lows will drop into the mid to upper 60s tonight with highs close to normal on Saturday. && .LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/... A very brief period of zonal flow will occur Saturday night until a secondary lobe of shortwave energy rotates through the Ohio Valley in the mean longwave trough. The axis of this wave will cross late Sunday, with showers and thunderstorms expected to be the rule of the day Sunday, quickly ending in the evening. This will hamper daytime highs which should only get into the low to mid 80s after morning lows in the mid 60s. Overnight should remain dry and see lows drop to the lower 60s across the region. Monday will have cloudy skies and another lobe of shortwave energy crossing through lower MI and LERI, possibly resulting in some showers or thunderstorms with a slightly higher chance residing in central OH. Once again, highs will only top out 80-85 degrees. Another dry night with cool nw flow should have lows by Tuesday morning in the 60-65 range. This dry period will last through daybreak Wednesday, then a slight chance of rain will be necessary in the forecast as zonal wly flow pushes s/w energy east as a surface low is progged to be somewhere in the vicinity of nw OH Wed night. While models are not that far off on the sensible weather and overall pattern, the European is a solid 6-12 deg warmer than the GFS starting Mon night and lasting through Wed night. Euro may verify better but the trend and national blend of models are cutting this difference neatly in half. Given a weakly building ridge until flow becomes zonal Wed night, this seems to be the more reasonable forecast. Lowered the temps a bit beyond this period as a hedge towards having cloud cover streaming in from the west. && .AVIATION /15Z FRIDAY THROUGH TUESDAY/... Mist at KLUK and KILN will dissipate early in the TAF period. Scattered to broken cumulus will spread over the area as a cold front approaches. Showers and thunderstorms will develop ahead of this front and sweep across the terminals between 16Z and 21Z. Additional showers and possibly some thunderstorms will occur behind the front potentially affecting KDAY to KCMH/KLCK through 00Z. Expect ceilings in central Ohio to drop to MVFR after 00Z, although at this point it looks like this will only occur for a few hours before returning to VFR. South winds will increase ahead of the front. After the front passes, winds will veer to the west southwest and strengthen a bit further. In addition, there will be some wind gusts at or above 20 kt. Gusts will diminish after 00Z although sustained winds will remain around 10 kt. OUTLOOK...Thunderstorms are possible Sunday and Monday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS... NEAR TERM...Novak SHORT TERM... LONG TERM...Franks AVIATION...
Hazardous Weather Outlook National Weather Service Wilmington OH 1159 AM EDT Fri Jul 10 2020 INZ050-058-059-066-073>075-080-KYZ089>099-OHZ026-034-035-042>045- 051>054-060>063-070>072-077>080-111600- Wayne-Fayette IN-Union IN-Franklin IN-Ripley-Dearborn-Ohio- Switzerland-Carroll-Gallatin-Boone-Kenton-Campbell-Owen-Grant- Pendleton-Bracken-Robertson-Mason-Hardin-Mercer-Auglaize-Darke- Shelby-Logan-Union OH-Miami-Champaign-Clark-Madison-Preble- Montgomery-Greene-Fayette OH-Butler-Warren-Clinton-Hamilton-Clermont- Brown-Highland- 1159 AM EDT Fri Jul 10 2020 This Hazardous Weather Outlook is for East Central Indiana, Southeast Indiana, Northern Kentucky, Central Ohio, South Central Ohio, Southwest Ohio and West Central Ohio. .DAY ONE...This afternoon and tonight. Isolated damaging wind gusts will be possible this afternoon. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotters are asked to submit significant weather conditions, while following all local, state and CDC guidelines. KYZ100-OHZ046-055-056-064-065-073-074-081-082-088-111600- Lewis-Delaware-Franklin OH-Licking-Pickaway-Fairfield-Ross-Hocking- Adams-Pike-Scioto- 1159 AM EDT Fri Jul 10 2020 This Hazardous Weather Outlook is for Northeast Kentucky, Central Ohio and South Central Ohio. .DAY ONE...This afternoon and tonight. Isolated damaging wind gusts will be possible this afternoon. The combination of temperatures in the upper 80s and lower 90s along with high relative humidity will lead to the heat index rising to between 95 and 100 today. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotters are asked to submit significant weather conditions, while following all local, state and CDC guidelines.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
1048 AM EDT FRI JUL 10 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0245 PM TSTM WND DMG CALIFORNIA 38.92N 84.26W
07/09/2020 CAMPBELL KY PUBLIC
REPORT VIA SOCIAL MEDIA. TREES DOWN AND LAWN
FURNITURE THROWN. TIME ESTIMATED VIA RADAR.
&&
SEBPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
1101 AM EDT FRI JUL 10 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0300 PM TSTM WND DMG 1 NW WILLIAMSTOWN 38.65N 84.57W
07/09/2020 GRANT KY EMERGENCY MNGR
NUMEROUS TREES DOWN ALONG BARNES PIKE IN DRY
RIDGE. TIME ESTIMATED FROM RADAR.
&&
JDRPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
1104 AM EDT FRI JUL 10 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0302 PM TSTM WND DMG 1 ESE DRY RIDGE 38.68N 84.58W
07/09/2020 GRANT KY EMERGENCY MNGR
SEVERAL TREES DOWN ALONG STEWART LANE, KINGS
DRIVE AND ELM STREET OUTSIDE OF DRY RIDGE.
TIME ESTIMATED FROM RADAR.
&&
JDRSpecial Weather Statement
National Weather Service Wilmington OH
1134 AM EDT Fri Jul 10 2020
OHZ063-072-080-101600-
Highland OH-Fayette OH-Clinton OH-
1134 AM EDT Fri Jul 10 2020
...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN FAYETTE...EAST CENTRAL
CLINTON AND NORTH CENTRAL HIGHLAND COUNTIES UNTIL NOON EDT...
At 1134 AM EDT, radar indicated a strong thunderstorm near Leesburg,
moving northeast at 30 mph.
STORM HAZARDS INCLUDE...
Winds to 50 mph...
One half inch diameter hail...
Locations impacted include...
Washington Court House, Sabina, Leesburg, Staunton, Good Hope,
Highland, Lees Creek, Rock Mills, New Martinsburg and Jasper Mills.
To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.
LAT...LON 3943 8333 3933 8362 3941 8373 3961 8348
3947 8330
TIME...MOT...LOC 1534Z 228DEG 28KT 3940 8359
HickmanSpecial Weather Statement National Weather Service Wilmington OH 1139 AM EDT Fri Jul 10 2020 OHZ054-055-101615- Madison OH-Franklin OH- 1139 AM EDT Fri Jul 10 2020 ...A STRONG THUNDERSTORM WILL AFFECT FRANKLIN AND EAST CENTRAL MADISON COUNTIES UNTIL 1215 PM EDT... At 1139 AM EDT, radar indicated a strong thunderstorm near Lake Darby, moving northeast at 20 mph. STORM HAZARDS INCLUDE... Winds to 45 mph... Locations impacted include... Columbus, Dublin, Grove City, Upper Arlington, Hilliard, Worthington, Bexley, Jefferson, West Jefferson, Ohio State University, Lake Darby, Grandview Heights, Urbancrest, Valleyview, Marble Cliff, Riverlea, Clintonville, Georgesville, Darbydale and Lincoln Village. This includes the following Interstates... I-70 in Ohio between mile markers 83 and 107. I-71 in Ohio between mile markers 99 and 115. To report hazardous weather conditions, go to our website at weather.gov/iln and submit your report via social media, when you can do so safely. LAT...LON 3982 8319 3997 8332 4014 8307 3992 8287 TIME...MOT...LOC 1539Z 235DEG 15KT 3991 8321 Novak
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
1214 PM EDT FRI JUL 10 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1207 PM TSTM WND GST KOSU OSU AIRPORT 40.08N 83.07W
07/10/2020 M55 MPH FRANKLIN OH ASOS
&&
HICKMANThe Cincinnati radar (KILN), 111 km away, was scanning. The volume nearest the first event began at 16:16 UTC.
12 thunderstorm wind, 1 hail. Local standard time, as filed.
A tree was downed onto Juniper Avenue.
A few large branches were downed.
Numerous large tree limbs were downed in the Bexley and Whitehall areas.
A large limb fell onto a house, damaging the front porch.
A few trees and power lines were downed near the intersection of North Martin Street and Smith Street.
A tree and several large limbs were downed.
A tree and some power lines were downed.
Several power poles and wires were downed onto 19th Avenue.
Numerous trees and power lines were downed in the Sunbury area.
A few trees were downed, blocking State Route 605 at Fancher Road.
Some wires were downed onto Palmer Road and Taylor Road.
Some wires were downed onto Painter Run Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2020Every state in 2020This day in weather historyWarnings in Ohio, July 2020
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: 895810, 895815, 895811, 895817, 895812, 895821, 895824, 895839, 895825, 895827, 895832, 895828, 895837.