Showers and thunderstorms formed during the evening hours on the 12th.  A weak low pressure was over southern Ohio.  Minor flash flooding occurred in Jackson County.
After a lull in the rain during the morning into the early afternoon on the 13th, a mesoscale convective complex moved southeast through southern Ohio during the mid and late afternoon.
After another lull during the evening, more thunderstorms formed by late evening on the 13th in southeast Ohio.  These moved southeast and caused repetitive showers.  The heaviest rains were from Jackson County through Gallia County.  The 24 hour rain maximum was from an automatic gauge near Rio Grande with 3.98 inches.  Another gauge in Gallia County at Northup measured 3.23 inches.  Two gauges around Jackson measured 2.68 and 2.03 inches of rain.  The cooperative observer in Gallipolis measured 2.25 inches. Significant flash flooding occurred.
Finally, more thunderstorms formed in northern Ohio ahead of a cold front and mid level disturbance during the midday and early afternoon on the 14th.  These storms formed into a squall line and moved southeast, through southern Ohio during the late afternoon.  Rain amounts of a half inch to an inch in an hour were enough to cause minor flash flooding, since streams were running well above normal and soils were saturated.  In less than 8 days, the rain total at both Waterloo and Gallipolis was around 6.1 inches.
The last event from this multiple day episode was from the slow responding Symmes Creek in Lawrence County.

Flash Flood in JACKSON, OHIO
From 13-JUL-15 23:30:00 to 14-JUL-15 11:00:00 (EST-5)
Location: WELLINGTON
Flood cause: Heavy Rain
Property damage: 800.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Many roads became impassable.  Water rescues from vehicles occurred around the communities of Coalton and Oak Hil.  Evacuations occurred in the town of Jackson. Water collected in yards and around homes.  Most of the damage reported to the county involved its road system.  A few small roads had culverts washed out.  Some of the flooded streams included Salt Lick and Four Mile.

Flash Flood in VINTON, OHIO
From 14-JUL-15 01:45:00 to 14-JUL-15 04:30:00 (EST-5)
Location: HOPE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Many roads flooded and became impassable, including areas around McArthur and Zaleski.

Flash Flood in GALLIA, OHIO
From 14-JUL-15 01:15:00 to 14-JUL-15 06:30:00 (EST-5)
Location: CROWN CITY
Flood cause: Heavy Rain
Property damage: 1.00M
Crop damage: 0.00K
Reported by: 911 Call Center

Many roads were flooded and closed.  Damage occurred to some of those roads.  Gravel roads became mud paths when the gravel was washed away.  Culverts were unearthed and roads washed out. There were several water rescues from vehicles.  The hardest hit area was around Centerville and Rio Grande.  Basements were flooded in Gallipolis, with damage to furnaces.

Flash Flood in ATHENS, OHIO
From 14-JUL-15 01:30:00 to 14-JUL-15 04:30:00 (EST-5)
Location: JACKSONVILLE
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Creeks flooded and closed roads, including Kasler Creek.

Thunderstorm Wind in WASHINGTON, OHIO
From 14-JUL-15 15:30:00 to 14-JUL-15 15:30:00 (EST-5)
Location: STANLEYVILLE
Magnitude: 74.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The first damage was found near Glenwood Lane where mutiple trees were damaged.  The rain gutters of a house were damaged by falling tree branches.  More tree damage was found along Windy Point Drive and Grant Edwards Drive.  A large tree was snapped and fell onto the corner of a house causing roof damage.  Damage went further east to near Sherry Drive. At least 1 vehicle was damaged.

Flood in LAWRENCE, OHIO
From 15-JUL-15 11:00:00 to 17-JUL-15 22:00:00 (EST-5)
Location: WATERLOO
Flood cause: Heavy Rain
Property damage: 325.00K
Crop damage: 200.00K
Reported by: River/Stream Gage

The gauge on Symmes Creek at Aid crested around 22.77 feet just before dawn on the 16th.  Bankfull is around 19 feet. Water flooded fields, closed roads, and surrounded a few homes around Waterloo, Arabia, Aid, and Willow Wood.  Preliminary damage assessment had 1 single family house with minor flood damage when a portion of its foundation was undercut by the stream.  One other single family house had water in its basement, while a mobile home had water in its crawl space. The lower hay and corn fields along the stream were damaged.
It took until late on the 17th before water levels receded back to below bankfull.

Thunderstorm Wind in PERRY, OHIO
From 14-JUL-15 13:55:00 to 14-JUL-15 13:55:00 (EST-5)
Location: ZIONTOWN
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were blown down on Township Road 19.

Thunderstorm Wind in JACKSON, OHIO
From 14-JUL-15 15:40:00 to 14-JUL-15 15:40:00 (EST-5)
Location: WELLSTON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were blown down.

Thunderstorm Wind in JACKSON, OHIO
From 14-JUL-15 15:24:00 to 14-JUL-15 15:24:00 (EST-5)
Location: JACKSON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were blown down.

Thunderstorm Wind in VINTON, OHIO
From 14-JUL-15 15:30:00 to 14-JUL-15 15:30:00 (EST-5)
Location: WILKESVILLE
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were blown down.  One tree fell onto a barn.

Flash Flood in JACKSON, OHIO
From 12-JUL-15 22:45:00 to 13-JUL-15 01:15:00 (EST-5)
Location: COALTON
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: 911 Call Center

The heaviest rain fell to the northeast through southeast of the community of Jackson.  Roads were closed due to flooding, including Routes 32, 788 and 93.

Thunderstorm Wind in JACKSON, OHIO
From 14-JUL-15 15:40:00 to 14-JUL-15 15:40:00 (EST-5)
Location: OAK HILL
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were blown down.

Thunderstorm Wind in GALLIA, OHIO
From 14-JUL-15 15:42:00 to 14-JUL-15 15:42:00 (EST-5)
Location: RIO GRANDE
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were blown down.

Thunderstorm Wind in MEIGS, OHIO
From 14-JUL-15 15:48:00 to 14-JUL-15 15:48:00 (EST-5)
Location: MIDDLEPORT
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were blown down.  One tree fell onto a house.

Thunderstorm Wind in MEIGS, OHIO
From 14-JUL-15 15:50:00 to 14-JUL-15 15:50:00 (EST-5)
Location: MIDDLEPORT
Magnitude: 52.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees fell and brought down power lines.

Flash Flood in GALLIA, OHIO
From 13-JUL-15 00:00:00 to 13-JUL-15 01:00:00 (EST-5)
Location: CENTERPOINT
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Indian Creek flooded and closed Route 279 near Route 35.

Thunderstorm Wind in JACKSON, OHIO
From 13-JUL-15 14:15:00 to 13-JUL-15 14:16:00 (EST-5)
Location: OAK HILL
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were blown down around Oak Hill.

Thunderstorm Wind in GALLIA, OHIO
From 14-JUL-15 15:54:00 to 14-JUL-15 15:54:00 (EST-5)
Location: FAIRFIELD
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were blown down.

Thunderstorm Wind in GALLIA, OHIO
From 14-JUL-15 15:55:00 to 14-JUL-15 15:55:00 (EST-5)
Location: ADDISON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were blown down.

Thunderstorm Wind in LAWRENCE, OHIO
From 13-JUL-15 14:54:00 to 13-JUL-15 14:54:00 (EST-5)
Location: ATHALIA
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were blown down.

Hail in JACKSON, OHIO
From 13-JUL-15 21:55:00 to 13-JUL-15 21:55:00 (EST-5)
Location: WINCHESTER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in LAWRENCE, OHIO
From 14-JUL-15 16:06:00 to 14-JUL-15 16:06:00 (EST-5)
Location: LAWRENCE FURNACE
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees fell along Township Road 150.

Flash Flood in LAWRENCE, OHIO
From 14-JUL-15 17:15:00 to 14-JUL-15 19:00:00 (EST-5)
Location: KELLEY MILLS
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Small streams quickly rose and closed roads.  One example was Four Mile Creek north of Proctorville.  Prickley Ash Creek damaged the Pleasants Valley Freewill Church along Country Road 27 near Pedro. The building was moved off its foundation.  There was 32 inches of water inside.  One mobile home along Route 93 was destroyed by flood waters.  A few other homes had minor damage.

Flash Flood in GALLIA, OHIO
From 14-JUL-15 17:20:00 to 14-JUL-15 18:30:00 (EST-5)
Location: GALLIPOLIS
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Streams quickly rose and flooded streets.  In addition, urban flash flooding occurred in the town of Gallipolis.

Flash Flood in JACKSON, OHIO
From 14-JUL-15 17:15:00 to 14-JUL-15 18:30:00 (EST-5)
Location: JACKSON
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Streams overflowed onto roads.  In addition, urban street flooding occurred.

Thunderstorm Wind in WASHINGTON, OHIO
From 14-JUL-15 15:32:00 to 14-JUL-15 15:32:00 (EST-5)
Location: CAYWOOD
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A couple of houses lost shingles or pieces of siding.  Multiple trees were snapped or uprooted.

Thunderstorm Wind in WASHINGTON, OHIO
From 14-JUL-15 15:34:00 to 14-JUL-15 15:34:00 (EST-5)
Location: CAYWOOD
Magnitude: 65.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The final damage near Marietta was along Grub Road.  Here a garage was slightly shifted off its foundation.  Additional trees were damaged.