Showers with isolated thunderstorms developed along and ahead of a cold front across northern Ohio. These storms produced moderate to heavy rain concentrated along the frontal boundary stalled over lakeshore counties. The repeating storms brought rainfall of 1 to 3.5 inches, heaviest over Cuyahoga County. Water rescues were made in Lorain and Cuyahoga Counties mainly from overflowing creeks. The Big Creek in Parma (Cuyahoga County) reached  10.43 feet and 2,900 cfs resulting in flooding of a major thruway and business parking lots. Additional flooding occurred across the lakeshore counties from Lorain to Ashtabula Counties.

Flash Flood in LORAIN, OHIO
From 15-MAY-20 17:51:00 to 15-MAY-20 19:00:00 (EST-5)
Location: NORTH RIDGEVILLE
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Lear Nagle north of Chestnut Ridge. Rd. closed due to creek flooding. On Mill Creek Lane two vehicles became submerged in several feet of water with rescues needed. The observed 48 hr rainfall totals were 3.21��� in Elyria.

Flash Flood in CUYAHOGA, OHIO
From 15-MAY-20 16:27:00 to 15-MAY-20 17:30:00 (EST-5)
Location: BROOKLYN
Flood cause: Heavy Rain
Property damage: 3.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Two vehicles stranded in water on W 130th St near I-480. Water rescues needed.

Flash Flood in CUYAHOGA, OHIO
From 15-MAY-20 17:47:00 to 15-MAY-20 19:00:00 (EST-5)
Location: CLEVELAND HGTS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Water over E 105th Street in Cleveland near MLK Drive. An unidentified creek overflowed its banks leading to one trapped vehicle.

Flash Flood in CUYAHOGA, OHIO
From 15-MAY-20 17:02:00 to 15-MAY-20 21:00:00 (EST-5)
Location: BRECKSVILLE
Flood cause: Heavy Rain
Property damage: 4.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Significant flooding of the Chippewa Creek in the Brecksville Reservation notably in the   Brecksville Metropark Reservation.  The USGS gage at Chippewa Creek reached a stage of 8.37 feet at 725 PM with a flow of 3,360 cfs.  This falls between a 25 and 50 year flood. Flooding started in Broadview Heights as early as just after 6 PM with flooding of Broadview, Riverview, and Wiese Roads and by 7 PM the fire department had advised the area about flooding. The Winding Creek area saw high water levels.

Flash Flood in CUYAHOGA, OHIO
From 15-MAY-20 17:06:00 to 15-MAY-20 21:00:00 (EST-5)
Location: SHORT LINE JCT
Flood cause: Heavy Rain
Property damage: 75.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Major flooding in Parma and Brookpark primarily from urban and creek flooding. Big Creek reached 10.43 feet and 2,900 cfs at 6:35 PM, highest level of the year. This flow value falls between a 10 year and a 25 year flood event, however is the second such high flow event since March. Basement flooding started around 6:06 PM in Brookpark, followed shortly by more expansive flooding with a flash flood along the Big Creek leading to major flooding at Brookpark and Tiedeman with one car submerged in the Walmart parking lot. Sam���s Club parking lot also flooded. Other flood reports include Water flooding Ridgewood Golf Course, flowing across Ridge Road and into Ridgewood Lake Park and West Creek of Grantwood overflowing. 24 hr rainfall report from Parma was 2.21��� and 2.80 in Brook Park. 48 hour rainfall amounts of 3.5��� or greater in Olmsted Falls and Elyria.

Flood in CUYAHOGA, OHIO
From 15-MAY-20 17:22:00 to 15-MAY-20 18:30:00 (EST-5)
Location: OLMSTEAD FALLS ARPT
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Employee

Bagley Road Closed due to flooding. Reports of basement flooding.

Flood in LAKE, OHIO
From 15-MAY-20 16:49:00 to 15-MAY-20 18:00:00 (EST-5)
Location: MENTOR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Standing water on both SR-2 and I-90 near SR 615 in Mentor.