A series of upper level disturbances moving across the region brought several rounds of severe storms through the day.
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.
A series of upper level disturbances moving across the region brought several rounds of severe storms through the day.
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 10, 5:59 AM EST, 2 hours 51 minutes earlier.
Area Forecast Discussion National Weather Service Wilmington OH 659 AM EDT Mon Jul 10 2017 .SYNOPSIS... Disturbances traveling along a slow moving front will provide the focus for thunderstorms today through Tuesday. Hot temperatures are expected Wednesday when the front is forecast to lift north of the area. The likelihood for thunderstorms will return Thursday as the front sags south toward the Ohio River. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... Surface map show a strengthening front extending to Northwest Ohio from low pressure centered over Iowa. Thunderstorms have already developed and are affecting western counties early this morning, so increased pops as high as categorical there. Convection will continue to form through today in persistent instability on a humid southerly flow. A massive thunderstorm complex that developed over Minnesota north of the surface low may also reach northern locations by late this afternoon. Some thunderstorms may become severe in an environment containing moderate to strong CAPE of around 3000 J/KG, and rather potent wind fields that will aid in storm organization and strength. Locations that receive repeated rounds of convection may experience localized flooding. High temperatures in the mid and upper 80s will be close to normal. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM TUESDAY/... With the frontal boundary remaining in Ohio, the threat for thunderstorms will persist tonight through Tuesday. Timing and location of mesoscale elements is uncertain, but it appears that a round of thunderstorms triggered by a short wave rippling along the front will affect mainly northern locations tonight. Following a diurnal lull Tuesday morning, additional thunderstorms may develop Tuesday afternoon as the front sags farther south to Central Ohio. Expect temperatures to stay near normal, with highs in the mid and upper 80s. && .LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/... A surface front is expected to lift north Wednesday with pops decreasing from south to north. In the warm sector, Wednesday looks to be the warmest day of the week with highs from the upper 80s north to the lower 90s south. Surface wave to track through the Great Lakes with associated cold front dropping south into the Ohio Valley Thursday night/early Friday. This front will increase chances for thunderstorms and therefore have continued high chance pops Thursday. On the warm side of the system, expect high mainly in the mid and upper 80s Thursday. In the wake of the front surface high pressure to build southeast into the region later Friday into Saturday. Expect dry conditions with cooler temperatures. Highs Friday and Saturday are forecast in the lower and middle 80s. In the northwest flow the model solutions are showing a secondary front which drops southeast through the Ohio Valley. Considerable timing differences exist regarding this feature. Due to uncertainty and lack of moisture will limit any mention of precipitation to slight chance pops Saturday night into early Sunday. Highs on Sunday look to continue close to normal, ranging from the lower 80s north and mid 80s south. Surface high pressure to provide dry weather and cooler temperatures with highs on Monday ranging from near 80 north to the lower 80s south. && .AVIATION /12Z MONDAY THROUGH FRIDAY/... VFR is forecast through the TAF period. However, disturbances along a developing boundary, in conjunction with increasing moisture and instability, will produce thunderstorms at TAF sites. There is greater than average uncertainty today, due to the difficulty that models have in resolving mesoscale convection. Initial round of thunderstorms that developed earlier this morning are now moving east of TAF sites. Additional thunderstorms are forecast to develop and affect TAF sites by this afternoon. Handled with VCTS since timing and duration are uncertain. Went with VCSH for evening when instability may have been depleted loss of daytime and by earlier convection. Low level jet close to 35 knots required addition of wind shear to all sites after 00z Tuesday. Added VCSH to northern sites with the front nearby. Winds will gust around 20 knots from the southwest this afternoon as the pressure gradient tightens ahead of the slowly approaching boundary. OUTLOOK...Thunderstorms possible Tuesday and then again Thursday and Friday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS...Coniglio NEAR TERM...Coniglio SHORT TERM...Coniglio LONG TERM...AR AVIATION...Coniglio
Hazardous Weather Outlook National Weather Service Wilmington OH 528 AM EDT Mon Jul 10 2017 INZ050-058-059-OHZ026-034-035-042>046-051>056-060>065-073-074-110930- 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- 528 AM EDT Mon Jul 10 2017 This Hazardous Weather Outlook is for East Central Indiana, Central Ohio, Southwest Ohio and West Central Ohio. .DAY ONE...Today and Tonight. Several rounds of thunderstorms are expected to move across the region today. Some of these storms could produce damaging straight line winds and large hail. Heavy rainfall may also occur which could lead to localized flooding. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot and humid conditions are expected Wednesday and Thursday which may result in heat indices rising into the mid to upper 90s both days. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. INZ066-073>075-080-KYZ089>100-OHZ070>072-077>082-088-110930- 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- 528 AM EDT Mon Jul 10 2017 This Hazardous Weather Outlook is for Southeast Indiana, Northeast Kentucky, Northern Kentucky and Southwest Ohio. .DAY ONE...Today and Tonight. Thunderstorms developing today will result in heavy downpours that may cause localized flooding. In addition, some thunderstorms may produce isolated damaging wind gusts and large hail. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot and humid conditions are expected Wednesday and Thursday which may result in heat indices rising into the mid to upper 90s both days. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Wilmington OH
615 AM EDT MON JUL 10 2017
OHZ026-101100-
Hardin OH-
615 AM EDT MON JUL 10 2017
...THUNDERSTORMS WILL AFFECT HARDIN COUNTY UNTIL 700 AM EDT...
At 614 AM EDT, radar indicated an area of strong thunderstorms
moving east at 25 mph across Hardin county. These storms will
produce very heavy rain.
STORM HAZARDS INCLUDE...
Winds to 30 mph...
Very heavy rain...
Locations impacted include...
Kenton, Ada, Forest, Dunkirk, Alger, Blanchard, Roundhead, Mount
Victory, Mcguffey, Ridgeway, Patterson, Dola, Grant, Silver Creek,
Jumbo, Huntersville, Pfeiffer, Walton, Hepburn and Mentzer.
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 8343 4050 8342 4050 8352 4051 8356
4053 8388 4070 8388 4082 8387
TIME...MOT...LOC 1014Z 266DEG 23KT 4076 8378
ARThe Cincinnati radar (KILN), 38 km away, was scanning. The volume nearest the first event began at 13:50 UTC.
10 thunderstorm wind, 9 flash flood, 8 hail, 1 flood, 1 tornado. Local standard time, as filed.
Two trees were downed near the Little Miami River bridge on U.S. Route 22.
A tree fell onto an SUV.
A couple of trees were downed in Genoa and Porter Townships.
Several small trees were downed.
There were several reports of 1.00 inch diameter hail on the south side of Hilliard.
An 18 inch diameter branch was downed on the OSU campus.
A six inch branch was downed at the intersection of 4th Avenue and North High Street.
Several trees were downed on Dry Creek Road.
Trees were downed on Welsh Hills Road.
Interstate 71 was closed at 5th Avenue due to high water.
Several roads were closed along Hamilton Road due to high water.
Portions of Dublin Road were flooded and impassable between Fishinger and Davidson Roads.
Quarter to Ping Pong sized Hail fell in the Lancaster area.
Several trees were downed at the intersection of State Routes 312 and 664.
Numerous trees and power lines were downed.
High water was covering several neighborhood roads.
A creek overflowed onto Robinwood Avenue.
High water was reported on Bridgestone Drive.
High water was reported on North Columbus Street.
High water was reported in numerous locations along State Route 159.
State Route 93 was closed in both directions due to high water between State Routes 312 and 668.
The tornado touched down near Winkler Road just west of State Route 49. As the tornado moved east, damage was observed at a residence on the southwest corner of Winkler Road and Short Road. The tornado damaged the roof of a home and several nearby trees were also damaged.
As the tornado continued east, it caused damage to the roof of a house west of Wabash Road, along with damage to trees on the property.
The tornado moved east-southeast across Hill Road, crossing Winkler Road and damaging crops and trees along its path. Rotational scarring was noted in the corn fields adjacent to Winkler Road and Jordan Road.
The tornado crossed Jordan Road, moving east-southeast to near the intersection of Lee Road and Erastus-Durbin Road. At a property on the southeast corner of this intersection, one outbuilding was destroyed, with its debris scattered into the field to the east.
The tornado damaged another area of trees along Township Line Road and then continued east-southeast into open fields north of Rockford West Road before it dissipated.
Some water rescues were needed in Wapakoneta due to rising water.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2017Every state in 2017This day in weather historyThe tornado archive for Ohio, 2017Warnings in Ohio, July 2017
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: 700197, 700202, 700198, 700199, 700201, 700203, 700656, 700204, 700205, 700206, 700207, 700208, 700210, 700212, 700215, 700217, 700219, 700220, 700221, 700222, 700223, 700225, 700228, 700229, 700658, 700657, 700659, 700660, 700661.