Dew points across the region during the morning of the event were in the lower 70s with high moisture content throughout the air column. A prefrontal trough moved southward into the region during the morning hours of the 13th, triggering convection.  The environment supported very high rainfall rates of 4 inches an hour or greater in strong storms.  All combined conditions favored a high risk of heavy rain and flooding. A Flash Flood Watch was issued for the area on Wednesday July 12 in effect through the morning of July 14.
Major flooding occurred in Hancock county where 3 to locally 6 inches of rain fell during the early morning hours of July 13th 2017. Significant river flooding occurred on the Blanchard River. Overland flooding also occurred in Wood, Seneca, Sandusky, and Wyandot  counties. The Portage River reached moderate flood stage, and the Sandusky River reached minor flood stage.

Flood in HANCOCK, OHIO
From 13-JUL-17 06:00:00 to 15-JUL-17 23:00:00 (EST-5)
Location: (FDY)FINDLAY ARPT
Flood cause: Heavy Rain
Property damage: 12.00M
Crop damage: 1.50M
Reported by: Emergency Manager

Major flooding occurred in Hancock county starting on July 13 and lasting through the 15th. Three to locally five inches of rain fell during the early morning hours of July 13th producing widespread overland flooding, localized flash flooding, and shortly thereafter significant river flooding on the Blanchard River and tributaries Eagle and Lye Creeks.
The week prior to this event had been wetter than normal with a minor flooding event on the Eagle Creek near Findlay. Rainfall over the prior few days saturated the top soil with standing water in many locations across northern and northwest Ohio, rivers and creeks remained above normal. The environment for the 13th were supportive of heavy rain. The WFO CLE issued a Flash Flood Watch for the area on Wednesday July 12 at 3 pm in effect for that night through the morning of July 14.  Dew points across the region during the morning of the event were in the lower 70s with high moisture content throughout the air column. A pre-frontal trough moved southward into the region during the morning hours of the 13th, triggering convection. The warm cloud depth at times reached over 13,000 feet, anomalously high even for July.  The environment supported very high rainfall rates of 4 inches an hour or greater in strong storms.  All combined conditions favor a high risk of flash flooding  with concerns for subsequent river flooding.
The Blanchard River reached it���s fifth highest level on record at a stage of 16.5 feet midday on the 14th. Both the Eagle and Lye Creeks produced major flooding as well. In all damages exceeded $10 million mostly in Findlay; 5 homes destroyed, 21 with major damage, 114 with minor damage, and 285 affected properties.
Access in and around Findlay was significantly hampered. Elsewhere in Hancock County over 3 dozen roads were closed due to flooding. No reports of damages to bridges or washouts of roads.  Some stormwater drainage issues caused or exasperated the flooding in some areas, but the majority of the impacts were from the Blanchard River or the Eagle and Lye Creeks.
Hancock County lands are predominantly used for agricultural purposes. Standing flood waters produced widespread damage to crops. Most notably impacted were the soy bean fields.

Flood in WYANDOT, OHIO
From 13-JUL-17 10:00:00 to 14-JUL-17 09:45:00 (EST-5)
Location: CAREY
Flood cause: Heavy Rain
Property damage: 650.00K
Crop damage: 0.00K
Reported by: County Official

Heavy rainfall on the morning of July 13th caused the Spring Run to over-top it���s levees around 1045 am. By 11 am State Route 103 and 23 north were shut down. By 1140 am water started to inundate downtown Carey. Major flooding into homes and businesses in Carey occurred around 5 pm when water was at it���s deepest up to 6��� deep. Sixty homes were affected, many from backups of storm drainage. Six to seven homes had water on West Ogg Street mainly from Spring Run. Dozens of businesses directly impacted, mostly with basement flooding. The water receded by 3 am Friday morning. The Tymochee Creek washed out some cross roads near ST RT 103 and RT 106. The waste water plant measured 3.8  in the southeast part of town, while unofficial reports of 5.5 in northern part of town. Radar estimates rainfall amounts between 4 and 6 inches of rain fell between 4 and 7 inches of rainfall during the same time period.

Flood in SENECA, OHIO
From 13-JUL-17 05:00:00 to 14-JUL-17 09:00:00 (EST-5)
Location: FOSTORIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

On the morning of July 13 heavy rain produced some overland flooding in Seneca County. Fostoria measured 3.20��� between 4-6 am. Road flooding was common across the area including US 224-west of Tiffin and SR53 south of Tiffin. Numerous local road closures occured across the county.

Flood in WOOD, OHIO
From 13-JUL-17 11:00:00 to 14-JUL-17 03:00:00 (EST-5)
Location: RISING SUN
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rainfall fell over Wood County on the morning of July 13. NWS has no official records of rainfall amounts over the hardest hit areas, however unofficial observations from farmers in the area report as much as 6 to 8 inches near Pemberville. Most of the rain fell between 4 and 6 am. The most notable issues were in Wayne where multiple homes saw basement flooding. At the peak people drove through a foot of water on South Street. In North Baltimore a 12 year old boy had to be rescued as a tributary to the Portage River overflowed it's banks into the park where the child was playing. In Fostoria several roads were closed due to flooding with several vehicles stranded.

Flood in SANDUSKY, OHIO
From 13-JUL-17 10:00:00 to 15-JUL-17 11:00:00 (EST-5)
Location: WOODVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rain fell over Sandusky County on the morning of the 13th. The heavy rain fell onto already saturated ground conditions from previously heavy rainfall during the week. Most small stream and creeks overflowed their banks across the County. Flooding caused extensive road closures across the county, but no inundation of homes or businesses. A few of the road closures: County Roads 164, 146,153 flooded. SR 19 closed near Muddy Creek in Kingsway.

Flash Flood in HANCOCK, OHIO
From 13-JUL-17 04:35:00 to 13-JUL-17 09:00:00 (EST-5)
Location: MC COMB
Flood cause: Heavy Rain
Property damage: 575.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rain moved into Hancock County shortly after 2 am on July 13th. Between 3 and 4 am 2.60��� of rain fell near the reservoir east of Findlay, with an additional 1.46��� between 4 and 5 am with a storm total of 4.61���. A cocorahs observer measured 4.66��� in Findlay, with unofficial reports of 5��� or greater in the county.
Several roads flooded, up to 2' of water in spots. Intersection of Westmoor Rd. and Sweetwater in the northwest corner of Findlay had 2' to 3' of water. At 6 am several cars were reported stranded in town. The flooding destroyed a home on U.S. 224 West of Findlay as McKinnis Run rose pushing 2-3 foot of water into the house. Three other houses just to the north of the destroyed home had 3-5 and upwards of 8-10 inches of water in their homes. In all 25 homes were flooded, most with basement flooding.