Isolated thunderstorms developed in the vicinity of a 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.
Isolated thunderstorms developed in the vicinity of a 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 11, 2:41 PM EST, 1 hour 38 minutes earlier.
Area Forecast Discussion National Weather Service Wilmington OH 341 PM EDT Sat Aug 11 2018 .SYNOPSIS... A cold front will sag south of the Ohio River this evening. An upper level low will slowly move east across the upper Ohio Valley through Tuesday, keeping low chances of precipitation. Another weather system will approach for Wednesday into Thursday bringing the next chance of showers and thunderstorms to the region. && .NEAR TERM /UNTIL 6 AM SUNDAY MORNING/... Weak low pressure and a cold front will continue to move southeast of the Ohio River through this evening. Numerous showers and thunderstorms will continue through early evening, then they should decrease in coverage and shift off to the southeast overnight. The threat for locally heavy rainfall/flash flooding, along with isolated damaging wind gusts, will persist into early evening. Otherwise, skies are expected to clear overnight. The exception will be our southeast/far southern zones where stratus and/or patchy fog may develop late. Lows will fall into the lower to mid 60s. && .SHORT TERM /6 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/... Models are in good agreement in terms of synoptic features through the short term period. An upper level low will have closed off over Lake Erie/northeast Ohio by Sunday morning. This feature will move slowly south over eastern Ohio during the day. Diurnal heating/instability, along with the proximity of the low, will bring a low chance of showers/storms during the afternoon/early evening. Pcpn will be diurnally driven and should taper off/dissipate near or after sunset. Then, skies will vary from mostly clear to partly cloudy Sunday night. Highs on Sunday will peak into the lower 80s with lows Sunday night falling into the lower to mid 60s once again. && .LONG TERM /MONDAY THROUGH SATURDAY/... Stacked cutoff low in eastern Ohio will hang tough through Monday with just a slight eastward jog into western PA overnight. Thunderstorms that were in forecast have been downsized to just instability showers with marginal moisture profiles and a broad source of lift over the CWA in a cold advection pattern. Better storm threat will occur south and east of the closed low, where some warm advection may be pulled into the mix, which is well out of the ILN forecast area. Chances of rain will remain capped at 30% during this time, and even this seems to be a high end forecast. This weak threat will persist into the daylight hours on Tuesday, primarily in the eastern CWA - upper Scioto Valley/Columbus metro area with widely scattered showers or maybe passing sprinkles during the daylight hours. The next rain threat will occur Wednesday - possibly late Tuesday night west of the I-75 corridor as a warm front lifts northeast through Indiana in the wake of an upper level ridge passing east through the Ohio Valley. Activity will continue Wednesday night in a scattered nature, then pick back up on Thursday. Thursday activity occurs as the warm sector combines with the closing proximity of the upper low in the Great Lakes, and what appears to be at this moment in time a good bit of shortwave energy rounding the upper low over our area. The surface cold front should cross Thursday night and be followed closely by the axis of the upper low on Friday morning, with just a few lingering showers and possibly a thunderstorm occurring in the cold pool with the upper trough's passage on Friday. While some frontal remnants may be found south of the Ohio River on Saturday, will keep this period of the forecast dry for now. Temperatures will be near climo on highs with a peak on Tuesday in the mid to upper 80s in the areas that get a good bit of sunshine (mainly west), and again in the south and east Wednesday in the warm sector ahead of the expected rainfall. While we remain warm sectored on Thursday, significant threat of rain will hamper temperatures from rising past the low 80s anywhere. These readings in the low 80s and near 80 will continue for the remainder of the forecast in a cooler temperature advection in northerly surface flow. After lower 60s Monday night, overnight lows will be in the middle 60s for the bulk of the forecast. Upper 60s will be more common on Wed and Thurs night given the waa and increased moisture. && .AVIATION /20Z SATURDAY THROUGH THURSDAY/... Upper level energy digging into the central Great Lakes will push weak low pressure and a frontal boundary near and along the Ohio River southeast through this evening. Showers and thunderstorms will be most numerous for the KILN/KCVG/KLUK terminals and have this handled this with MVFR/IFR conditions with thunderstorms/heavy rain. Farther north, some lingering MVFR conditions with mainly showers can be expected until about 21Z, then skies should clear. For tonight, the cold front will move away to the southeast while an upper level closed low develops over Lakes Erie. Skies will become mostly clear. Models indicate that stratus and/or at least patchy fog may develop along and south of the Ohio River. This should stay just south of all TAF sites, except KLUK, which could develop some river fog. Have placed an IFR visibility restriction at KLUK for now. On Sunday, the center of the upper level closed low will drift slowly south over eastern Ohio. Diurnal heating will bring at least scattered cumulus clouds to the region. Max day time instability and the proximity of the low may pop an afternoon to early evening shower/storm. Coverage is too small to place in the terminals at this time. OUTLOOK...Thunderstorms will be possible on Wednesday and Thursday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS...Hickman NEAR TERM...Hickman SHORT TERM...Hickman LONG TERM...Franks AVIATION...Hickman
Hazardous Weather Outlook National Weather Service Wilmington OH 345 PM EDT Sat Aug 11 2018 INZ066-073>075-080-KYZ089>100-OHZ070>072-077>082-088-121200- Franklin IN-Ripley-Dearborn-Ohio-Switzerland-Carroll-Gallatin-Boone- Kenton-Campbell-Owen-Grant-Pendleton-Bracken-Robertson-Mason-Lewis- Butler-Warren-Clinton-Hamilton-Clermont-Brown-Highland-Adams-Pike- Scioto- 345 PM EDT Sat Aug 11 2018 This Hazardous Weather Outlook is for Southeast Indiana, Northeast Kentucky, Northern Kentucky, South Central Ohio and Southwest Ohio. .DAY ONE...This Afternoon and Tonight. Thunderstorms will move across the area through early evening. Flash flooding will be possible, along with isolated damaging wind gusts. .DAYS TWO THROUGH SEVEN...Sunday through Friday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. INZ050-058-059-OHZ026-034-035-042>046-051>056-060>065-073-074-121200- 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-Ross-Hocking- 345 PM EDT Sat Aug 11 2018 This Hazardous Weather Outlook is for East Central Indiana, Central Ohio, South Central Ohio and West Central Ohio. .DAY ONE...This Afternoon and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Wilmington OH
343 PM EDT SAT AUG 11 2018
KYZ092-093-096-097-OHZ078-112015-
Pendleton KY-Kenton KY-Campbell KY-Bracken KY-Clermont OH-
343 PM EDT SAT AUG 11 2018
...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN KENTON...NORTHWESTERN
BRACKEN...CAMPBELL...NORTHERN PENDLETON AND SOUTHERN CLERMONT
COUNTIES UNTIL 415 PM EDT...
At 343 PM EDT, radar indicated a strong thunderstorm near New
Richmond, moving southeast at 25 mph.
STORM HAZARDS INCLUDE...
Winds to 45 mph...
One half inch diameter hail...
Locations impacted include...
Independence, Alexandria, Walton, Claryville, New Richmond, Felicity,
Butler, Ryland Heights, Mentor, Moscow, Neville, California, Chilo,
Mount Auburn, Visalia, Atwood, Willow Grove, Bradford, Grants Lick
and Saltair.
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 3874 8452 3879 8453 3879 8458 3893 8460
3900 8422 3893 8403 3890 8404 3875 8417
3869 8446
TIME...MOT...LOC 1943Z 301DEG 23KT 3893 8433
HatzosPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
359 PM EDT SAT AUG 11 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0335 PM FLASH FLOOD 1 SE CONCORD 38.68N 83.48W
08/11/2018 LEWIS KY 911 CALL CENTER
WATER FLOWING OVER PORTION OF KY 8 NEAR CONCORD. TIME
ESTIMATED.
&&
KCPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
401 PM EDT SAT AUG 11 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0335 PM FLASH FLOOD 1 SSW VANCEBURG 38.58N 83.33W
08/11/2018 LEWIS KY 911 CALL CENTER
WATER FLOWING OVER A PORTION OF KY 59. TIME ESTIMATED.
&&
KCSpecial Weather Statement
National Weather Service Wilmington OH
409 PM EDT SAT AUG 11 2018
KYZ093-096-097-OHZ078-112030-
Pendleton KY-Campbell KY-Bracken KY-Clermont OH-
409 PM EDT SAT AUG 11 2018
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN BRACKEN...SOUTHERN
CAMPBELL...NORTHEASTERN PENDLETON AND SOUTHERN CLERMONT COUNTIES
UNTIL 430 PM EDT...
At 409 PM EDT, radar indicated a strong thunderstorm near Neville,
moving southeast at 25 mph.
STORM HAZARDS INCLUDE...
Winds to 45 mph...
One half inch diameter hail...
Locations impacted include...
New Richmond, Felicity, Butler, Mentor, Moscow, Neville, California,
Chilo, Mount Auburn, Willow Grove, Bradford, Grants Lick, Gubser
Mill, Peach Grove, Ivor, Campbell County Lake, Point Isabel,
Johnsville, Woolcutt and Lenoxburg.
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 3884 8442 3895 8433 3893 8415 3888 8404
3870 8407 3872 8432
TIME...MOT...LOC 2009Z 297DEG 24KT 3887 8429
HatzosSpecial Weather Statement
National Weather Service Wilmington OH
449 PM EDT SAT AUG 11 2018
KYZ097>099-OHZ079-081-112115-
Robertson KY-Mason KY-Bracken KY-Adams OH-Brown OH-
449 PM EDT SAT AUG 11 2018
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT MASON...ROBERTSON...
SOUTHEASTERN BRACKEN...SOUTHEASTERN BROWN AND SOUTHWESTERN ADAMS
COUNTIES UNTIL 515 PM EDT...
At 449 PM EDT, radar indicated strong thunderstorms along a line
extending from Ripley to 7 miles south of Brooksville, moving
southeast at 20 mph.
STORM HAZARDS INCLUDE...
Winds to 40 mph...
One half inch diameter hail...
Locations impacted include...
Maysville, Washington, Manchester, Ripley, Aberdeen, Lewisburg,
Brooksville, Decatur, Russellville, Mount Olivet, Dover, Germantown,
Sardis, Blue Licks Battlefield, Murphysville, Burika, Alhambra,
Stonewall, Bradysville and Mays Lick.
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 3856 8416 3864 8415 3872 8397 3888 8381
3885 8356 3868 8362 3867 8364 3863 8364
3857 8366 3849 8376 3846 8386 3849 8393
3846 8397 3843 8399
TIME...MOT...LOC 2049Z 294DEG 16KT 3876 8381 3859 8402
HatzosSpecial Weather Statement
National Weather Service Wilmington OH
501 PM EDT SAT AUG 11 2018
INZ074-112130-
Dearborn IN-
501 PM EDT SAT AUG 11 2018
...A STRONG THUNDERSTORM WILL AFFECT CENTRAL DEARBORN COUNTY UNTIL
530 PM EDT...
At 501 PM EDT, radar indicated a strong thunderstorm near Moores
Hill, moving southeast at 20 mph.
STORM HAZARDS INCLUDE...
Winds to 40 mph...
Pea size hail...
Locations impacted include...
Lawrenceburg, Greendale, Aurora, Hidden Valley, Bright, Guilford,
Wilmington, Logan, Manchester, Mount Sinai, Dover and New Alsace.
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 3915 8508 3927 8498 3923 8483 3911 8482
3908 8486 3907 8489 3906 8490 3903 8488
3901 8490 3902 8491 3901 8493 3901 8494
3900 8495
TIME...MOT...LOC 2101Z 313DEG 19KT 3916 8500
HatzosThe Cincinnati radar (KILN), 103 km away, was scanning. The volume nearest the first event began at 21:20 UTC.
1 thunderstorm wind. Local standard time, as filed.
A couple of trees were reported knocked down on Soap Hill Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2018Every state in 2018This day in weather historyWarnings in Indiana, 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: 764538.