Severe thunderstorms and heavy rain developed ahead of and along a slow moving cold front sinking south across the area during the afternoon and evening of May 30th. Thunderstorms filled in during the late afternoon hours in the unstable and moist environment ahead of the front.  Severe thunderstorms brought downed trees and penny to quarter size hail to portions of northern Ohio, including Huron, Lorain, Cuyahoga, Summit, and Geauga Counties.  An estimated 13,000 people reportedly lost power in Cuyahoga County alone.  The numerous rounds of rain also resulted in flash flooding across the central portion of Cuyahoga County. Numerous reports of flooded roadways were received across Parma, Brooklyn, Brooklyn Center, Cuyahoga Heights, and Cleveland Heights with water reportedly up to the bumper in many areas. I-77 had to be closed due to 2 to 3 feet of water on the interstate near Grant.  I-480 and I-490 both had flooded entrance and exit ramps.  Cars were reported washed off the road into ditches along Old Denison Ave. and Memphis Ave in Brooklyn.  West Creek came out of its banks and flooded Broadview and Snow Roads in Parma.  The flooding developed as torrential rain moved through the urban corridor with much of this area receiving between 1.5 and 3.0 inches of rain in 2 hours with storm totals reports of 2.5 to 4 inches of rain.

Flash Flood in CUYAHOGA, OHIO
From 30-MAY-15 18:09:00 to 30-MAY-15 21:00:00 (EST-5)
Location: BROOKLYN
Flood cause: Heavy Rain
Property damage: 600.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Numerous reports of flooded roadways across Parma, Brooklyn, Brooklyn Center, Cuyahoga Heights, and Cleveland Heights with water reportedly up to the bumper in many areas. I-77 had to be closed near Grant with 2 to 3 feet.  I-480 at Ridge Rd Exit was completely flooded.  Cars were reported washed off the road along Old Denison Ave. and Memphis Ave in Brooklyn.  West Creek came out of its banks and flooded Broadview and Snow Roads in Parma.  Poe Rd. flooded in Brooklyn Center.  Flowing water and dangerous conditions reported near E 55th St and I-490.  The flooding developed as torrential rain moved through the urban corridor with much of this area receiving between 1.5 and 3.0 inches of rain in 2 hours with storm totals reports of 2.5 to 4 inches of rain.

Thunderstorm Wind in LUCAS, OHIO
From 30-MAY-15 14:40:00 to 30-MAY-15 14:40:00 (EST-5)
Location: PT PLACE
Magnitude: 50.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported large limbs and some power lines brought down due to thunderstorm winds.

Thunderstorm Wind in GEAUGA, OHIO
From 30-MAY-15 17:31:00 to 30-MAY-15 17:31:00 (EST-5)
Location: BAINBRIDGE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

Dispatch reported trees down in Bainbridge.

Thunderstorm Wind in CUYAHOGA, OHIO
From 30-MAY-15 16:39:00 to 30-MAY-15 16:39:00 (EST-5)
Location: LINNDALE
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

The public reported large trees down across Fulton Road at Archmere and Northcliff and W 58th Street in Brooklyn.  Penny size hail accompanied the storm.

Thunderstorm Wind in CUYAHOGA, OHIO
From 30-MAY-15 16:15:00 to 30-MAY-15 16:18:00 (EST-5)
Location: PARMA
Magnitude: 50.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Social Media

Trees down in Parma and a Wall collapsed at Brookpark Auto Auction due to thunderstorm winds.

Hail in CUYAHOGA, OHIO
From 30-MAY-15 16:45:00 to 30-MAY-15 16:45:00 (EST-5)
Location: LAKESHORE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained weather spotter reported penny size hail in Bedford.

Hail in SUMMIT, OHIO
From 30-MAY-15 17:18:00 to 30-MAY-15 17:18:00 (EST-5)
Location: TWINSBURG
Magnitude: 1.00 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

The public reported quarter size hail in Twinsburg.

Hail in LORAIN, OHIO
From 30-MAY-15 17:18:00 to 30-MAY-15 17:18:00 (EST-5)
Location: LA GRANGE
Magnitude: 1.00 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

The public reported quarter size hail in LaGrange.

Thunderstorm Wind in CUYAHOGA, OHIO
From 30-MAY-15 17:58:00 to 30-MAY-15 18:00:00 (EST-5)
Location: BROOKLYN HGTS
Magnitude: 50.00 EG
Property damage: 70.00K
Crop damage: 0.00K
Reported by: State Official

Widespread wind damage in Brooklyn Heights. Trees also down on Fairmount Rd in Cleveland Heights and in Shaker Heights.

Hail in CUYAHOGA, OHIO
From 30-MAY-15 17:59:00 to 30-MAY-15 17:59:00 (EST-5)
Location: GARFIELD HGTS
Magnitude: 1.00 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported quarter size hail in Garfield Heights.

Thunderstorm Wind in HURON, OHIO
From 30-MAY-15 18:22:00 to 30-MAY-15 18:22:00 (EST-5)
Location: WILLARD
Magnitude: 52.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained weather spotter estimated wind gusts of 60 to 70 mph with branches down across the area.

Hail in CUYAHOGA, OHIO
From 30-MAY-15 17:43:00 to 30-MAY-15 17:43:00 (EST-5)
Location: JAITE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported penny size hail.

Thunderstorm Wind in LORAIN, OHIO
From 30-MAY-15 17:15:00 to 30-MAY-15 17:15:00 (EST-5)
Location: CLEARVIEW
Magnitude: 50.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The fire department reported several large limbs down in Lorain from thunderstorm winds.