Isolated Thunderstorm developed in a warm and humid airmass over central Ohio during the late afternoon and evening hours.
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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 Thunderstorm developed in a warm and humid airmass over central Ohio during the late afternoon and evening hours.
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 Sep 18, 2:58 PM EST, 2 hours 47 minutes earlier.
Area Forecast Discussion National Weather Service Wilmington OH 358 PM EDT Sun Sep 18 2016 .SYNOPSIS... Moisture associated with weak low pressure will move east tonight. Dry weather is expected Monday through Friday when high pressure is forecast to build across the region. A frontal boundary will provide the focus for thunderstorm development next weekend. && .NEAR TERM /UNTIL 6 AM MONDAY MORNING/... Moisture continues to stream northeastward along the Appalachians on a southwest flow on the east flank of an upper trough. Though widespread precip remains well to the east, isolated showers are lingering in limited moisture and weak instability on the western periphery of this system. Kept low chance pops through the evening, with a diminishing trend expected tonight with loss of daytime heating and with upper support gradually weakening. Cooler temperatures filtering in from the northwest coupled with radiational cooling will lead overnight lows in the upper 50s in northwest counties, while lows should stay up in the mid 60s southeast due to thicker clouds. && .SHORT TERM /6 AM MONDAY MORNING THROUGH TUESDAY NIGHT/... For Monday, upper trough axis will be east of the area, while a flattened ridge pushes in from the west. This will allow high pressure to develop at the surface, which will remain over the area through Tuesday. This regime is expected to result in dry weather for the ILN area. Mostly sunny skies and weak warm advection will result in a modest warming trend. Look for highs mainly in the low 80s Monday, rising the mid 80s Tuesday. && .LONG TERM /WEDNESDAY THROUGH SUNDAY/... Above normal temperatures and generally dry weather expected through the week. Mid/upr level ridge over the southern US with a band of westerlies through the Great Lakes to start the long term. Precipitation wail be confined to region close to weak surface front which lays out parallel to the upper level flow across the Great Lakes. The mid/upr level ridge over the southern US will expand north and east, becoming centered over the southeast by the end of the week. Temperatures will start out with highs 80 to 85 on Wednesday, warming to the mid and upper 80s with muggy air returning by Friday and Saturday. Upper level trof to track east across the northern Plains into the western Great Lakes by next Monday. Model solutions differ on timing but generally have trended slower. Given high amplitude flow, a slower soln is reasonable. So have limited pops to slight chance of a shower or thunderstorm Saturday afternoon and chance pops Sunday. && .AVIATION /20Z SUNDAY THROUGH FRIDAY/... MVFR CIGs from this morning will continue to lift in favor of VFR conditions this afternoon. Hi-res models continue to indicate spotty -SHRA development this afternoon, especially across central OH. Some isolated development has already taken place, but expect coverage to be limited enough to maintain just a VCSH for KCMH and KLCK thru the afternoon. Winds will remain light and variable this afternoon ahead of a very weak cold front. Winds will remain light/calm overnight, leading to the potential for BR development once again, especially for eastern sites where drier air will be slower to filter in. Although slightly drier air will be moving into the area, calm winds/clear skies may allow VSBYs at KLUK to go IFR at times towards 12z Monday. VFR conditions are expected after 13z Monday, with perhaps just a few passing cirrus through 18z. Winds will remain light out of the north on Monday. OUTLOOK...No significant weather expected. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS...Coniglio NEAR TERM...Coniglio SHORT TERM...Coniglio LONG TERM...AR AVIATION...KC
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE WILMINGTON OH 525 AM EDT SUN SEP 18 2016 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-190930- 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- 525 AM EDT SUN SEP 18 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL INDIANA...SOUTHEAST INDIANA...NORTHEAST KENTUCKY...NORTHERN KENTUCKY...CENTRAL OHIO...SOUTHWEST OHIO AND WEST CENTRAL OHIO. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
The Cincinnati radar (KILN), 79 km away, was scanning. The volume nearest the first event began at 22:45 UTC.
4 flash flood. Local standard time, as filed.
State Routes 316 and 752 were closed due to high water in the South Bloomfield area.
A passenger was stuck in a vehicle on Moull Street due to high water.
An estimated 2 feet of water was covering Tammy Louise Drive.
Cromley Street was closed due to high water.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2016Every state in 2016This day in weather historyWarnings in Ohio, September 2016
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: 650738, 650737, 650736, 650735.