A surface low moved generally eastward from east-central Lower MI to the southeastern shore of Lake Huron during the evening of the 20th. Simultaneously, the low's warm front swept northeastward across southern ON and western NY toward the northern shore of Lake Ontario as the low's trailing cold front moved generally eastward across southeastern Lower MI and far-northeastern IN to central Lake Erie and northeastern OH.
Multiple lines and clusters of multicell thunderstorms persisted generally eastward and southeastward across northern OH during the early through mid-evening hours of the 20th and produced sporadic severe hail and straight-line convective wind damage as the storms encountered moderate to strong MUCAPE and effective bulk shear, respectively, within the warm sector. An embedded supercell produced large hail in Westlake, a western suburb of Cleveland. Although the thunderstorms moved progressively across the area, the thunderstorms produced torrential rainfall across Cuyahoga County, with instantaneous rainfall rates of 4 to 5 inches per hour and rainfall totals of 1.75 to 2.5 inches in a period of one hour or less. The torrential rainfall resulted in instances of flash flooding.

Hail in CUYAHOGA, OHIO
From 20-JUL-23 18:26:00 to 20-JUL-23 18:26:00 (EST-5)
Location: BROOKLYN HGTS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail up to quarter-size at NWS Cleveland Forecast Office in Brooklyn Heights.

Flash Flood in CUYAHOGA, OHIO
From 20-JUL-23 18:53:00 to 20-JUL-23 20:30:00 (EST-5)
Location: SHAKER HGTS
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several roadways around and near downtown Cleveland flooded with cars stranded. Flooding of Doan Brook upstream of Lower Shaker Lake caused flooding of South Park Boulevard.

Thunderstorm Wind in LAKE, OHIO
From 20-JUL-23 17:25:00 to 20-JUL-23 17:25:00 (EST-5)
Location: FAIRPORT HARBOR
Magnitude: 60.00 EG
Property damage: 2.50K
Crop damage: 0.00K
Reported by: Public

Widespread trees downed and siding partially peeled-off from home in Fairport Harbor.

Thunderstorm Wind in ASHTABULA, OHIO
From 20-JUL-23 17:32:00 to 20-JUL-23 17:32:00 (EST-5)
Location: CONNEAUT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple large trees and tree limbs downed in Conneaut.

Thunderstorm Wind in WOOD, OHIO
From 20-JUL-23 17:18:00 to 20-JUL-23 17:18:00 (EST-5)
Location: WALBRIDGE
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Toledo Executive Airport ASOS measured a peak convective wind gust of 59-mph from a thunderstorm.

Hail in CUYAHOGA, OHIO
From 20-JUL-23 18:40:00 to 20-JUL-23 18:40:00 (EST-5)
Location: BEDFORD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to half dollar-size in Bedford.

Thunderstorm Wind in TRUMBULL, OHIO
From 20-JUL-23 18:50:00 to 20-JUL-23 18:50:00 (EST-5)
Location: HOWLAND CORNERS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees downed in Howland Center.

Thunderstorm Wind in MEDINA, OHIO
From 20-JUL-23 18:50:00 to 20-JUL-23 18:50:00 (EST-5)
Location: BRUNSWICK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Tree downed in Brunswick.

Thunderstorm Wind in KNOX, OHIO
From 20-JUL-23 20:10:00 to 20-JUL-23 20:10:00 (EST-5)
Location: BRANDON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Several trees downed in Brandon.

Hail in CUYAHOGA, OHIO
From 20-JUL-23 18:03:00 to 20-JUL-23 18:03:00 (EST-5)
Location: WESTLAKE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to hen egg-size in Westlake.

Thunderstorm Wind in LAKE, OHIO
From 20-JUL-23 17:27:00 to 20-JUL-23 17:27:00 (EST-5)
Location: PAINESVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tree limbs downed in Painesville.

Hail in CUYAHOGA, OHIO
From 20-JUL-23 18:03:00 to 20-JUL-23 18:03:00 (EST-5)
Location: NORTH OLMSTED
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to quarter-size in North Olmsted.

Hail in CUYAHOGA, OHIO
From 20-JUL-23 18:22:00 to 20-JUL-23 18:22:00 (EST-5)
Location: LINNDALE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail up to ping pong ball-size in Brooklyn.

Hail in CUYAHOGA, OHIO
From 20-JUL-23 18:36:00 to 20-JUL-23 18:36:00 (EST-5)
Location: VALLEY VIEW
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail up to ping pong ball-size in Valley View.

Thunderstorm Wind in HURON, OHIO
From 20-JUL-23 18:41:00 to 20-JUL-23 18:41:00 (EST-5)
Location: NEW LONDON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees downed in New London.

Thunderstorm Wind in SENECA, OHIO
From 20-JUL-23 18:49:00 to 20-JUL-23 18:49:00 (EST-5)
Location: BLOOMVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Two trees downed in Bloomville.

Flash Flood in CUYAHOGA, OHIO
From 20-JUL-23 18:40:00 to 20-JUL-23 20:30:00 (EST-5)
Location: WESTLAKE
Flood cause: Heavy Rain
Property damage: 3500.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flash flooding across the western suburbs of Cleveland, including Bay Village, North Olmsted, Fairview Park, Rocky River and Lakewood. Notable road closures due to flooding include I-90 East near McKinley Avenue and West 117th Avenue between Berea Road and Detroit Avenue in Lakewood, West 130th Street and Bellaire Road and West 150th Street north of Brookpark Road in Cleveland. Great Northern Avenue north of Brookpark Road was flooded with several feet of standing water in North Olmsted. Extensive basement flooding reported, including between 1 to 2 dozen basements in Bay Village and 175 basements in Fairview Park.

Hail in OTTAWA, OHIO
From 20-JUL-23 16:39:00 to 20-JUL-23 16:39:00 (EST-5)
Location: LAKESHORE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to half dollar-size about seven-miles NNE of Oak Harbor.

Thunderstorm Wind in MEDINA, OHIO
From 20-JUL-23 18:55:00 to 20-JUL-23 18:55:00 (EST-5)
Location: MEDINA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Tree downed in Medina.

Thunderstorm Wind in TRUMBULL, OHIO
From 20-JUL-23 19:00:00 to 20-JUL-23 19:00:00 (EST-5)
Location: CHURCHILL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees downed in Liberty Township.

Hail in CUYAHOGA, OHIO
From 20-JUL-23 18:18:00 to 20-JUL-23 18:18:00 (EST-5)
Location: PARMA HGTS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to golf ball-size in Parma Heights.

Hail in CUYAHOGA, OHIO
From 20-JUL-23 18:22:00 to 20-JUL-23 18:22:00 (EST-5)
Location: PARMA
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to ping pong ball-size in Parma.

Thunderstorm Wind in HANCOCK, OHIO
From 20-JUL-23 18:09:00 to 20-JUL-23 18:09:00 (EST-5)
Location: VANLUE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Top of maple tree snapped-off and limb snapped-off separate tree in Vanlue.

Flash Flood in CUYAHOGA, OHIO
From 20-JUL-23 19:25:00 to 20-JUL-23 21:00:00 (EST-5)
Location: (CLE)HOPKINS INTL AR
Flood cause: Heavy Rain
Property damage: 350.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several flooded roadways near Cleveland Hopkins International Airport, including OH-237 South near Brookpark Road and Snow Road at OH-237. Several cars inundated by flood waters, requiring assistance from Cleveland Hopkins Airport Fire Rescue. More than one dozen flooded basements reported in Parma and North Royalton. Flooded roadways in Parma and North Royalton include Regency Drive, State Road, Thoreau Drive, Antoinette Drive, and North Akins Road near South Gateway Drive.

Thunderstorm Wind in CUYAHOGA, OHIO
From 20-JUL-23 18:08:00 to 20-JUL-23 18:08:00 (EST-5)
Location: FAIRVIEW
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Tree downed about two-miles ENE of Fairview Park.

Thunderstorm Wind in MEDINA, OHIO
From 20-JUL-23 18:50:00 to 20-JUL-23 18:50:00 (EST-5)
Location: BRUNSWICK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Power pole downed along Laurel Road, between South Carpenter Road and Eisenhower Drive.

Thunderstorm Wind in SUMMIT, OHIO
From 20-JUL-23 18:50:00 to 20-JUL-23 18:50:00 (EST-5)
Location: MACEDONIA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several tree limbs and entire trees downed in Macedonia.

Thunderstorm Wind in LAKE, OHIO
From 20-JUL-23 17:18:00 to 20-JUL-23 17:18:00 (EST-5)
Location: MENTOR ON THE LAKE
Magnitude: 60.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Power pole snapped and fell onto car. Also, numerous trees downed, one of which damaged a shed. All of this damage occurred on the north side of Mentor-on-the-Lake, near Mentor Lagoons.

Thunderstorm Wind in LAKE, OHIO
From 20-JUL-23 17:18:00 to 20-JUL-23 17:18:00 (EST-5)
Location: MENTOR
Magnitude: 60.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Public

Large tree downed onto car and large tree branch downed onto another car in Mentor.

Thunderstorm Wind in CUYAHOGA, OHIO
From 20-JUL-23 18:24:00 to 20-JUL-23 18:24:00 (EST-5)
Location: BEREA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Several large tree limbs snapped and an entire tree downed in Berea.

Hail in CUYAHOGA, OHIO
From 20-JUL-23 18:25:00 to 20-JUL-23 18:25:00 (EST-5)
Location: WALTON HILLS
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to ping pong ball-size in Seven Hills.

Thunderstorm Wind in SUMMIT, OHIO
From 20-JUL-23 19:40:00 to 20-JUL-23 19:40:00 (EST-5)
Location: COMET
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees downed in New Franklin.

Thunderstorm Wind in MAHONING, OHIO
From 20-JUL-23 19:57:00 to 20-JUL-23 19:57:00 (EST-5)
Location: POLAND
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snapped tree limbs caused roof damage about two-miles east of Boardman.

Thunderstorm Wind in CUYAHOGA, OHIO
From 20-JUL-23 18:03:00 to 20-JUL-23 18:03:00 (EST-5)
Location: NORTH OLMSTED
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees downed in North Olmsted.

Thunderstorm Wind in HANCOCK, OHIO
From 20-JUL-23 17:50:00 to 20-JUL-23 17:50:00 (EST-5)
Location: JENERA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several tree limbs downed in Jenera.

Thunderstorm Wind in CUYAHOGA, OHIO
From 20-JUL-23 18:12:00 to 20-JUL-23 18:12:00 (EST-5)
Location: LAKEWOOD
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Large tree branch snapped near Lakewood Park in Lakewood.

Thunderstorm Wind in LORAIN, OHIO
From 20-JUL-23 17:56:00 to 20-JUL-23 17:56:00 (EST-5)
Location: AVON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two trees downed about two-miles east of Avon.

Hail in LORAIN, OHIO
From 20-JUL-23 17:54:00 to 20-JUL-23 17:54:00 (EST-5)
Location: AVON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail up to quarter-size in Avon.

Hail in CUYAHOGA, OHIO
From 20-JUL-23 18:12:00 to 20-JUL-23 18:12:00 (EST-5)
Location: LAKEWOOD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail up to quarter-size in Lakewood.

Flash Flood in CUYAHOGA, OHIO
From 20-JUL-23 19:25:00 to 20-JUL-23 21:00:00 (EST-5)
Location: SHORT LINE JCT
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Flash flooding along Big Creek from just north of Brookpark Road downstream through the Cleveland Metroparks Zoo. The USGS river gage reading at Big Creek near Brooklyn (Brookpark Road) rose from 3.8 feet to a crest of 11.2 feet in 90 minutes, with the flooded creek causing flooding of a parking lot with less than 5 parked cars inundated. Downstream, the USGS river gage reading at Big Creek at Cleveland (Cleveland Metroparks Zoo) rose from 5.0 feet to a crest of 12.9 feet in 70 minutes. Flooding from the creek caused minor damage to festival displays staged in the low lying areas of the Zoo near the creek.

Thunderstorm Wind in ASHLAND, OHIO
From 20-JUL-23 19:07:00 to 20-JUL-23 19:07:00 (EST-5)
Location: SAVANNAH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A few trees downed about four-miles ENE of Savannah.