Isolated strong thunderstorms developed ahead of weak upper level disturbance.
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The episode as NWS ILN wrote it up.
Isolated strong thunderstorms developed ahead of weak upper level disturbance.
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 Aug 6, 3:08 PM EST, 1 hour 22 minutes earlier.
Area Forecast Discussion National Weather Service Wilmington OH 408 PM EDT Mon Aug 6 2018 .SYNOPSIS... A warm and humid airmass will linger overnight. A cold front moving into the region Tuesday into Wednesday will bring scattered thunderstorms. Behind the front on Thursday, slightly cooler and drier air back will work into the region. && .NEAR TERM /UNTIL 6 AM TUESDAY MORNING/... An area of convection based in the Cinci Tri-state will os slowly drifting east. Expect this trend to continue late this afternoon, before it gradually dissipates with sunset. Farther north, latest meso-scale models are suggesting that early evening will be dry as the line of thunderstorms stay north, and the area waits for the convection farther out by Mississippi River to reach the area overnight. That area is forecast to reach the area after 06Z, but is should be on a weakening trend, so only went with chance PoPs overnight. The better coverage will be to the north of the fa. It will be a a warm and muggy night with lows in the lower 70s. && .SHORT TERM /6 AM TUESDAY MORNING THROUGH WEDNESDAY/... Region will be under large-scale forcing on Tuesday as a H5 s/w swings through the flow. Atmosphere will remain moderately unstable with capes of 3-4K J/kg. Convective coverage should increase as the diurnal cycle increase on Tuesday. An isolated storm could strengthen enough to produce strong gusty winds and heavy rainfall. Kept the highest PoPs across the middle of the fa. With more cloud cover and pcpn, highs will be slightly cooler on Tuesday, only reaching the mid to upper 80s. Convection will linger into Tuesday night as upper support for the advancing s/w remains. && .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... With a frontal boundary across the region and an upper level disturbance moving through on Wednesday, increased precipitation chances across the region. This precipitation will keep temperatures down on Wednesday with high temperatures generally in the lower 80s. On Thursday the area still looks to be primarily between systems, however a weak system south of the region will bring the chance for a few thunderstorms along and south of the Ohio River. By Friday the southern system will move further north. In addition another disturbance will work down from the northwest. This will bring additional thunderstorm chances to the region. An upper low near the region will keep precipitation chances in the forecast through Monday. Temperatures for the weekend and into early next week will be limited by the clouds and precipitation chances and be generally in the upper 70s to lower 80s. && .AVIATION /20Z MONDAY THROUGH SATURDAY/... Convection has developed around CVG/LUK in the slightly better instability. Expect the convection to gradually transition ewd, so only have VCSH/VCTS for them during the afternoon hours instead of a tempo. Some of the convection could clip ILN, but have left the nrn tafs dry for this afternoon. Models develop convection across nrn IL/nrn IN/srn MI this afternoon, but the consensus is to not bring into into the tafs until after 03Z. Even then there are differences in their timing and coverage as it comes through the tafs. At that time of night, expect it to be on a weakening trend, so kept the conditions VFR with a VCSH mention. LUK could see some fog overnight so have MVFR fog there from 08-12Z. Scattered thunderstorms will be possible late Tuesday morning inti the afternoon as boundary working into the area interacts with the unstable airmass. Have VCTS at all tafs. OUTLOOK...Thunderstorms possible Wednesday, then again Friday and Saturday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS...KC/Sites NEAR TERM...Sites SHORT TERM...Sites LONG TERM... AVIATION...Sites
Hazardous Weather Outlook National Weather Service Wilmington OH 403 AM EDT Mon Aug 6 2018 INZ050-058-059-OHZ026-034-035-042>046-051>054-056-060-062-065-070815- Wayne-Fayette IN-Union IN-Hardin-Mercer-Auglaize-Darke-Shelby-Logan- Union OH-Delaware-Miami-Champaign-Clark-Madison-Licking-Preble- Greene-Fairfield- 403 AM EDT Mon Aug 6 2018 This Hazardous Weather Outlook is for East Central Indiana, Central Ohio and West Central Ohio. .DAY ONE...Today and Tonight. There is a low probability for widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Showers and storms are likely on Tuesday afternoon and evening. A few strong storms may be possible, with gusty winds and locally heavy rain being the primary threats. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. INZ066-073>075-080-KYZ089>100-OHZ055-061-063-064-070>074-077>082-088- 070815- Franklin IN-Ripley-Dearborn-Ohio-Switzerland-Carroll-Gallatin-Boone- Kenton-Campbell-Owen-Grant-Pendleton-Bracken-Robertson-Mason-Lewis- Franklin OH-Montgomery-Fayette OH-Pickaway-Butler-Warren-Clinton- Ross-Hocking-Hamilton-Clermont-Brown-Highland-Adams-Pike-Scioto- 403 AM EDT Mon Aug 6 2018 This Hazardous Weather Outlook is for Southeast Indiana, Northeast Kentucky, Northern Kentucky, Central Ohio, South Central Ohio, Southwest Ohio and West Central Ohio. .DAY ONE...Today and Tonight. Temperatures around 90 degrees and dewpoints around 70 degrees this afternoon will lead to heat index values in the mid to upper 90s. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Showers and storms are likely on Tuesday afternoon and evening. A few strong storms may be possible, with gusty winds and locally heavy rain being the primary threats. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The Cincinnati radar (KILN), 105 km away, was scanning. The volume nearest the first event began at 21:31 UTC.
3 thunderstorm wind. Local standard time, as filed.
A tree fell down on power lines on Swauger Valley Road near Dutch Ridge Road.
A large tree was knocked down.
A semi-trailer carrying a mostly empty load flipped on U.S. 33 near Celina-Mendon Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2018Every state in 2018This day in weather historyWarnings in Ohio, August 2018
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: 763998, 764003, 764005.