Scattered thunderstorms developed during the afternoon in a warm and unstable air mass.
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 during the afternoon in a warm and unstable air mass.
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 7, 9:01 AM EST, 3 hours 32 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Wilmington OH 1001 AM EDT Tue Jul 7 2020 .SYNOPSIS... Above normal temperatures and high humidity levels will provide a chance for afternoon and evening storms through the work week. A frontal system pushing through the Ohio Valley late Friday into Saturday will return temperatures to near normal for the weekend. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... Very few adjustments were made with the morning update as ongoing forecast remains largely on-track. Anticipate convective initiation shortly before/around 18z -- perhaps initially from west-central to central Ohio as the cap will likely erode in these areas first. With continued light steering flow and an abundance of SB/ML instby and PWATs between 1.6-1.8," the concern remains for slow-moving thunderstorms to produce torrential rainfall rates in a very localized manner for the second half of the afternoon into the evening hours. The DCAPE environment does not appear to be /quite/ as favorable as was the case on Monday, although certainly some water-loading could initiate enough downward momentum for some gusty winds to reach the surface beneath the healthiest cores. The gusty wind threat will be very localized in manner, with the main concern being the very heavy rain/flooding threat with the slow-moving activity. Until we can get enough coverage of storms/outflows later this afternoon, the main item of interest will be the heat/humidity. Will see heat index values again approach 100 degrees in some spots -- especially near the Tri-State area where dewpoints in the low/mid 70s early this afternoon will create heat index values ~8-10 degrees above air temps. Scattered coverage of storms will be maintained from mid- afternoon through the end of the near term period before waning toward/beyond sunset. ...PREVIOUS DISCUSSION... Heading into the day, expecting a quick warm up, with CAMs suggesting a favored axis in central Ohio as a weak H5 disturbance heads east. This will provide just enough forcing to get things going as SBCAPE values approach 2000 J/kg. Will maintain chance POPs across entire area, since locations further removed from the shortwave have higher SBCAPE -- upwards of 2500 J/kg in southwest Ohio. Main threat today will be localized flooding due to slow storm movement. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/... H5 shortwave lays out across the region through Wednesday, leaving another hot and humid day with slow-moving diurnal convection in the afternoon through evening hours. Based on persistence, wouldn't be surprised to see a few storms popping on boundaries away from peak heating hours due to lingering instability overnight. && .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... The upper level ridge will begin to shift off to the east on Thursday as mid level energy moves from the northern Plains to the Great Lakes. This will result in another day of diurnally driven scattered showers and thunderstorms on Thursday with highs in the low to possibly mid 90s. A mid/upper level trough will then shift slowly east across the Great Lakes and upper Ohio Valley as we head through the weekend. As the trough moves in, we will see a gradual return to somewhat more seasonable temperatures. Highs on Friday will be in the upper 80s to lower 90s, with highs in the mid to upper 80s for Saturday and Sunday. With the trough moving through, expect to see a continued chance of showers and thunderstorms each day, with some diurnal enhancement to the coverage. The models are suggesting that some additional short wave energy may drop down the back side of the trough into early next week, so will hang on to some lower chance pops into Monday to account for this. Highs on Monday will be in the mid 80s. && .AVIATION /14Z TUESDAY THROUGH SATURDAY/... Winds will remain rather light from the southwest today as cumulus begins developing in the late morning. Slow-moving thunderstorms will be the main threat of the TAF period with a focus during the mid afternoon through early evening hours, so these hours are highlighted with VCTS at all sites. A few storms remain possible bookending these times, though will be more widely scattered. OUTLOOK...Thunderstorms are possible Wednesday afternoon through Saturday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS...Hogue NEAR TERM...KC/Hogue SHORT TERM...Hogue LONG TERM...JGL AVIATION...Hogue
Hazardous Weather Outlook National Weather Service Wilmington OH 508 AM EDT Tue Jul 7 2020 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-081000- 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- 508 AM EDT Tue Jul 7 2020 This Hazardous Weather Outlook is for East Central Indiana, Southeast Indiana, Northeast Kentucky, Northern Kentucky, Central Ohio, South Central Ohio, Southwest Ohio and West Central Ohio. .DAY ONE...Today and tonight. Hot and humid conditions will lead to heat indices in the 95 to 100 degree range this afternoon. Scattered thunderstorms will also be capable of producing heavy rain and localized flooding this afternoon and evening. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot and humid conditions Wednesday through Friday will lead to heat indices of 95-100 degrees each afternoon. Scattered thunderstorms will also be capable of producing heavy rain and localized flooding during the afternoons and evenings through Friday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement National Weather Service Wilmington OH 1246 PM EDT Tue Jul 7 2020 INZ050-071715- Wayne IN- 1246 PM EDT Tue Jul 7 2020 ...A RAPIDLY DEVELOPING THUNDERSTORM WILL AFFECT NORTHWESTERN WAYNE COUNTY UNTIL 115 PM EDT... At 1245 PM EDT, radar indicated a thunderstorm 7 miles northeast of Hagerstown, moving east at 20 mph. STORM HAZARDS INCLUDE... Winds to 40 mph... One half inch diameter hail... Frequent cloud-to-ground lightning... Very heavy rain... Locations impacted include... Hagerstown, Economy and Williamsburg. Do not stay in the open or 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. 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 4001 8516 4000 8487 3992 8499 3990 8517 TIME...MOT...LOC 1645Z 270DEG 18KT 3999 8506 Coniglio
Special Weather Statement
National Weather Service Wilmington OH
119 PM EDT Tue Jul 7 2020
OHZ026-071745-
Hardin OH-
119 PM EDT Tue Jul 7 2020
...A STRONG THUNDERSTORM WILL AFFECT NORTHERN HARDIN COUNTY UNTIL 145
PM EDT...
At 119 PM EDT, radar indicated a strong thunderstorm over Dunkirk,
moving east at 15 mph.
STORM HAZARDS INCLUDE...
Winds to 40 mph...
Pea size hail...
Frequent cloud-to-ground lightning...
Very heavy rain...
Locations impacted include...
Kenton, Ada, Forest, Dunkirk, Alger, Blanchard, Mcguffey, Patterson,
Dola, Grant, Huntersville and Walton.
Do not stay in the open or 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.
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 4082 8350 4070 8350 4070 8344 4069 8344
4069 8342 4065 8342 4063 8388 4082 8388
TIME...MOT...LOC 1719Z 262DEG 13KT 4076 8360
ConiglioSpecial Weather Statement
National Weather Service Wilmington OH
133 PM EDT Tue Jul 7 2020
INZ050-OHZ042-060-071800-
Wayne IN-Darke OH-Preble OH-
133 PM EDT Tue Jul 7 2020
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN WAYNE...
NORTHWESTERN PREBLE AND SOUTHWESTERN DARKE COUNTIES UNTIL 200 PM
EDT...
At 133 PM EDT, radar indicated a strong thunderstorm near New Paris,
moving east at 15 mph.
STORM HAZARDS INCLUDE...
Winds to 40 mph...
Pea size hail...
Frequent cloud-to-ground lightning...
Very heavy rain...
Locations impacted include...
Richmond, Centerville, New Paris, New Madison, Fountain City, Wayne
Lakes, Eldorado, West Manchester, Greens Fork, Spring Grove, Bethel,
Hollansburg, Castine, Whitewater, Middleboro, Interstate 70 at Exit
145 and Williamsburg.
This includes the following Interstates...
I-70 in Indiana between mile markers 142 and 156.
I-70 in Ohio between mile markers 0 and 9.
Do not stay in the open or 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.
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 4000 8481 4001 8481 4001 8464 3990 8460
3980 8465 3980 8505 4000 8508
TIME...MOT...LOC 1733Z 262DEG 11KT 3989 8484
ConiglioThe Cincinnati radar (KILN), 98 km away, was scanning. The volume nearest the first event began at 17:31 UTC.
1 thunderstorm wind. Local standard time, as filed.
A tree was downed near the intersection of Porterfield Road and State Route 121.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2020Every state in 2020This day in weather historyWarnings in Indiana, 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: 892024.