Strong to severe thunderstorms developed in the vicinity of an advancing cold front.
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.
Strong to severe thunderstorms developed in the vicinity of an advancing cold front.
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 28, 8:56 AM EST, 2 hours 6 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Wilmington OH 956 AM EDT Fri Aug 28 2020 .SYNOPSIS... A moist airmass will remain in place today and tonight as the remnants of Laura moves east across Kentucky while a cold front pushes southeast into the region. The cold front will clear the area by Saturday evening, allowing high pressure to build into the Great Lakes and Ohio Valley. This will result in drier and cooler air for Sunday. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... Morning update centered on muting temps this afternoon given ample cloud cover, and lowering the immediate rain chances. Removed thunder chances before noon and then brought in isolated thunder this afternoon where pops >= chance category. Moist airmass will continue to be split between the tropical and more upper level forced precip to the south and the frontally and surface forced parcels to the north. The overall weak lift allows for varying solutions on where/when convection will be the most active. In addition, given the moist airmass, it will not take much lift to result in rainfall. Thus, expect scattered showers and thunderstorms to develop later this morning. The likelihood of showers/storms may occur along and north of I-70 where instability, lift, and convergence is maximized while scattered convection occurs elsewhere. There is a risk for a few strong to severe storms given pcpn loading (downbursts) along with localized flooding from heavy rain. Highs will range from the lower to mid 80s. && .SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY NIGHT/... The remnants of Laura in the form of weak surface low pressure will track east across Kentucky tonight while a cold front moves southeast into our region. It appears that the pcpn associated with Laura will skim our Kentucky zones. For the rest of the area, shower/storm coverage should diminish this evening with the loss of heating. In fact, the combination of convergence into Laura and convergence into the cold front to our northwest may bring a period of little pcpn activity to northern/western sections (low level divergence) for much of the night until the front moves in. Lows will range from the upper 60s to the lower 70s. On Saturday, the cold front will continue southeast through the region. A chance of showers/slight chance of thunderstorms will exist until frontal passage. Clouds will begin to scatter from the northwest during the afternoon hours. Highs will range from the lower to mid 80s. For Saturday night, high pressure will build south into the Great Lakes and Ohio Valley. Drier and cooler air will filter into the area. Skies will become mostly clear with some higher level clouds arriving across the southern zones late. Lows will range from the lower 50s northwest to near 60 far southeast. && .LONG TERM /SUNDAY THROUGH THURSDAY/... Surface high pressure forming under a westerly flow aloft should allow dry weather on Sunday. Upper flow will then back to southwest and remain so through the remainder of the long term as a trough builds to the west. This flow will bring increasing moisture that will work with short wave energy along developing boundary to keep a threat of showers and thunderstorms in the forecast Monday through Thursday. The first round of moisture and forcing should impact mainly southern locations on Monday when there will be a good chance for showers and a few thunderstorms. Similar conditions are expected Tuesday in this slowly evolving pattern. The front, aligned roughly parallel to the upper flow, may play a more prominent role Wednesday and Thursday as it moves gradually from the west. Frontal convergence will keep the chance for showers and thunderstorms in the forecast, perhaps aided by moisture transported from the Pacific Ocean as the upper trough digs farther south while a closed upper low forms near the base. Hard to pinpoint a widespread severe weather threat at this point, though heavy rain may be observed in association with the slow moving boundary. Temperatures start below normal, with highs reaching the mid and upper 70s Sunday. As we move into the early part of September, readings are forecast to rebound gradually, with near normal highs in the lower 80s expected by Thursday. && .AVIATION /14Z FRIDAY THROUGH TUESDAY/... A very moist airmass will remain across the region today. Weak low level moisture transport and weak embedded energy aloft will couple with diurnal instability to produce at least scattered convection across the region. At this time, the best coverage is expected toward the KCMH/KLCK terminals where MVFR conditions in TSRA were forecast. Given the moist airmass, aviators need to be aware that lower conditions may occur in the more robust storms (IFR/LIFR visibilities). Winds will be from the south around 10 knots with local gusts up to 16 knots. For tonight, a cold front will push southeast into our region late. Meanwhile, the remnants of Laura will be moving east across Kentucky. There looks like there will be a downward trend in storms/coverage this evening with the loss of heating. For the overnight hours, precipitation associated with Laura is expected to remain mainly south/southeast of the terminals across Kentucky while a chance of showers/slight chance of thunderstorms will remain in the airmass ahead of the approaching front. Low levels will moisten up ahead of the front, and it now looks like MVFR and IFR ceilings will develop overnight. OUTLOOK...MVFR/IFR ceilings expected Saturday. Thunderstorms possible Monday and Tuesday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS...Hickman NEAR TERM...Franks/Hickman SHORT TERM...Hickman LONG TERM...Coniglio AVIATION...Hickman
Hazardous Weather Outlook National Weather Service Wilmington OH 432 AM EDT Fri Aug 28 2020 INZ050-058-059-OHZ026-034-035-042>046-051>056-060>065-290845- Wayne-Fayette IN-Union IN-Hardin-Mercer-Auglaize-Darke-Shelby-Logan- Union OH-Delaware-Miami-Champaign-Clark-Madison-Franklin OH-Licking- Preble-Montgomery-Greene-Fayette OH-Pickaway-Fairfield- 432 AM EDT Fri Aug 28 2020 This Hazardous Weather Outlook is for East Central Indiana, Central Ohio and West Central Ohio. .DAY ONE...Today and tonight. Thunderstorms will develop across the area today. Some storms could be severe, mainly in the afternoon and evening. Damaging winds are the primary severe weather threat. In addition, locally heavy rainfall may result in flooding. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed, while following all local, state and CDC guidelines. INZ066-073>075-080-KYZ089>100-OHZ070>074-077>082-088-290845- Franklin IN-Ripley-Dearborn-Ohio-Switzerland-Carroll-Gallatin-Boone- Kenton-Campbell-Owen-Grant-Pendleton-Bracken-Robertson-Mason-Lewis- Butler-Warren-Clinton-Ross-Hocking-Hamilton-Clermont-Brown-Highland- Adams-Pike-Scioto- 432 AM EDT Fri Aug 28 2020 This Hazardous Weather Outlook is for Southeast Indiana, Northeast Kentucky, Northern Kentucky, Central Ohio, South Central Ohio and Southwest Ohio. .DAY ONE...Today and tonight. There is a low probability for widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Wilmington OH
1103 AM EDT Fri Aug 28 2020
INZ050-OHZ042-060-281530-
Wayne IN-Darke OH-Preble OH-
1103 AM EDT Fri Aug 28 2020
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN WAYNE...NORTHERN
PREBLE AND SOUTHERN DARKE COUNTIES UNTIL 1130 AM EDT...
At 1102 AM EDT, radar indicated a strong thunderstorm near New
Madison, moving northeast at 35 mph.
STORM HAZARDS INCLUDE...
Winds to 45 mph...
Very heavy rain...
Locations impacted include...
Greenville, Arcanum, Bradford, New Madison, Webster, Wayne Lakes,
Gettysburg, Eldorado, Verona, West Manchester, Pitsburg, Bethel,
Hollansburg, Gordon, Palestine, Ithaca, Castine, Whitewater, Union
Corners and Abbottsville.
This includes I-70 in Ohio between mile markers 5 and 8.
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 4001 8484 4000 8481 4002 8481 4021 8444
3992 8443 3992 8448 3989 8449 3982 8471
3997 8491
TIME...MOT...LOC 1502Z 240DEG 30KT 3990 8470Special Weather Statement
National Weather Service Wilmington OH
1141 AM EDT Fri Aug 28 2020
OHZ042-051-281615-
Darke OH-Miami OH-
1141 AM EDT Fri Aug 28 2020
...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL DARKE AND CENTRAL
MIAMI COUNTIES UNTIL 1215 PM EDT...
At 1141 AM EDT, radar indicated a strong thunderstorm near Pleasant
Hill, moving northeast at 25 mph.
STORM HAZARDS INCLUDE...
Winds to 50 mph...
Pea size hail...
Very heavy rain...
Locations impacted include...
Troy, Piqua, Tipp City, West Milton, Covington, Pleasant Hill, Laura,
Potsdam, Casstown, Ludlow Falls, Haven View, Circle Hill and
Farrington.
This includes I-75 in Ohio between mile markers 71 and 84.
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 4019 8422 4019 8417 4003 8404 4001 8404
3996 8444 4004 8453 4020 8423
TIME...MOT...LOC 1541Z 244DEG 23KT 4001 8444The Cincinnati radar (KILN), 72 km away, was scanning. The volume nearest the first event began at 16:02 UTC.
18 thunderstorm wind. Local standard time, as filed.
A trailer was flipped over and a metal barn door was bent in. Also, a tree was knocked down onto the road.
Large tree limbs were knocked down.
A large section of a 50 foot tall tree was knocked down.
Several trees were knocked down near the intersection of Walnut Street and Orchard Lane.
Large tree limbs were knocked down.
A tree was knocked down.
A power pole was blown down.
Several trees were reported knocked down throughout the county.
Trees were reported knocked down.
A few trees and power lines were knocked down in the Heath and Newark areas.
A tree fell down on a house.
A pole was knocked down onto a house.
A tree was knocked down.
Several healthy tree limbs were knocked down.
Trees were reported knocked down near the intersection of Liberty Hill Road and OH-772.
Trees were reported knocked down.
Trees were reported knocked down near the intersection of Three Locks Road and U.S. 23.
Trees were reported knocked down.
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, August 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: 907897, 907698, 907699, 907700, 907701, 907703, 907704, 907705, 907706, 907708, 907709, 907710, 907711, 907712, 907726, 907731, 907733, 907740.