A cold front moved southeastward from Lower Michigan to Lake Erie during the evening and overnight of the 15th and then stalled in vicinity of the southern lakeshore by daybreak. This was in response to one surface low moving northeastward from southwestern Quebec toward the mouth of the Saint Lawrence River, while another low moved along the front from eastern Iowa to near the Michigan/Indiana border. Ahead of the front, several multicell thunderstorms generated damaging wind gusts in northern Ohio on the 15th and 16th. These storms occurred in a warm sector comprised of moderate to strong instability and DCAPE, and moderate effective bulk shear. Training thunderstorms along and ahead of the cold front during the afternoon and evening hours of the 16th led to flooding and flash flooding across portions of the area. Widespread rainfall amounts up to one inch were reported, with several swaths of rainfall from 2.5 to 4 where the flooding occurred.

Flash Flood in ASHLAND, OHIO
From 16-JUL-21 19:51:00 to 17-JUL-21 00:30:00 (EST-5)
Location: PARADISE HILL
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous road closures across the northern part of the county due to flooding, including the city of Ashland. Water was overtopping a pond and flowing across OH-250 into another pond near Bailey Lakes. 3' to 3.5' of water flowing over multiple roadways in Sullivan Township, where multiple roads were impassable with several residents unable to leave their homes. Culvert was washed out on Township Highway 673 between CR-620 and OH-58 due to flooding of Orange Creek.

Flash Flood in MEDINA, OHIO
From 16-JUL-21 20:30:00 to 16-JUL-21 22:30:00 (EST-5)
Location: HOMERVILLE
Flood cause: Heavy Rain
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Washed out culvert at Camp Road and Greenwich Road just west of Homerville. Significant flowing water over New London Eastern Road near Brandon Lane.

Thunderstorm Wind in HOLMES, OHIO
From 16-JUL-21 16:06:00 to 16-JUL-21 16:09:00 (EST-5)
Location: MILLERSBURG
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree damage in Millersburg and a separate tree down one-mile ENE of Millersburg.

Flash Flood in MAHONING, OHIO
From 16-JUL-21 16:30:00 to 16-JUL-21 19:00:00 (EST-5)
Location: SOUTHERN AIRWAYS ARP
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Extensive street and basement flooding in the Boardman and Struthers areas. A few reports, photos, and videos of up to 3 ft. of standing water on roadways, but a majority of roadway flooding ranged from a few inches up to knee deep water.

Thunderstorm Wind in GEAUGA, OHIO
From 15-JUL-21 18:07:00 to 15-JUL-21 18:07:00 (EST-5)
Location: MONTVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Several large tree limbs down two-miles north of Montville.

Thunderstorm Wind in ASHTABULA, OHIO
From 15-JUL-21 18:22:00 to 15-JUL-21 18:36:00 (EST-5)
Location: STONEVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree down at OH-43 and Mead Hollow Road, about six-miles WNW of Orwell. Another tree down along New Hudson Road, about two-miles northwest of Orwell.

Flood in TRUMBULL, OHIO
From 16-JUL-21 12:30:00 to 16-JUL-21 13:30:00 (EST-5)
Location: BAZETTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Trumbull County Fairgrounds was flooded due to a short burst of heavy rainfall. Water was generally ankle to knee deep throughout the fairgrounds, briefly closing rides and one parking lot. Radar estimated rainfall of 1 to 1.25 in thirty minutes to one hour.

Flash Flood in HURON, OHIO
From 16-JUL-21 19:05:00 to 16-JUL-21 22:00:00 (EST-5)
Location: CELERYVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Sheriff's office reported 30-40 road closures in the southern part of Huron county due to flooding. US-250 was inundated with several feet of water at a railroad underpass southwest of New London, and several cars became stranded in the floodwaters. Standing and flowing water 4 to 8 deep was reported in Willard, with minor street flooding in New London. Radar estimated a swath of 1.5 to 2 of rainfall in just under a 3 hour period.

Thunderstorm Wind in ASHTABULA, OHIO
From 15-JUL-21 18:45:00 to 15-JUL-21 18:45:00 (EST-5)
Location: ORWELL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Trees down in Orwell.

Thunderstorm Wind in GEAUGA, OHIO
From 15-JUL-21 17:57:00 to 15-JUL-21 17:57:00 (EST-5)
Location: THOMPSON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Trees down in Thompson.

Thunderstorm Wind in HOLMES, OHIO
From 16-JUL-21 15:56:00 to 16-JUL-21 15:56:00 (EST-5)
Location: GLENMONT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees down about one-mile southwest of Glenmont.

Flash Flood in CRAWFORD, OHIO
From 16-JUL-21 19:20:00 to 17-JUL-21 00:30:00 (EST-5)
Location: MONNETT
Flood cause: Heavy Rain
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Widespread flooding in northern Crawford county. Several roadways with flowing water over the road due to flooding of Broken Sword Creek north and northwest of Bucyrus, including OH-4 and OH-19. Water several feet deep at Temple Road and Bethel Road northwest of Bucyrus. Several inches of water flowing over OH-98 near Sulphur Springs. Tiffin Street Trailer Park flooded in Bucyrus. Water 2-3 ft. deep on roadways in Sulphur Springs. OH-602 closed between Remlinger Road and OH-98 due to flooding of a tributary of the Sandusky River. Radar estimated a swath of 2 to 3.5 of rainfall across the northern part of the county in a 3 hour period.

Flash Flood in RICHLAND, OHIO
From 16-JUL-21 19:30:00 to 16-JUL-21 22:00:00 (EST-5)
Location: VERNON JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Reports of numerous road closures across the northern part of the county due to flooding, including OH-603, OH-96, OH-13, and Sampsel Road. Flooding of Clear Creek closed Clear Creek Road between Town Line Road and the Ashland County Line. Mickey Road and Rogers Lane 1 mile SSE of Shelby had 3 ft. of water on the roadway. Radar estimated a swath of 1.5 to 2.5 of rainfall across the northern part of the county in a 3 hour period.