A warm front lifted north across northern Ohio during the afternoon hours of May 27th.  Showers and thunderstorms developed along this front.  A few of the thunderstorms became severe and locally heavy rainfall was also reported.  Flash flooding occurred in Ottawa and Sandusky Counties.

Hail in SANDUSKY, OHIO
From 27-MAY-09 14:00:00 to 27-MAY-09 14:00:00 (EST-5)
Location: FREMONT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny size hail was reported.

Thunderstorm Wind in CUYAHOGA, OHIO
From 27-MAY-09 14:19:00 to 27-MAY-09 14:19:00 (EST-5)
Location: WESTLAKE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds downed a tree.

Thunderstorm Wind in CUYAHOGA, OHIO
From 27-MAY-09 14:25:00 to 27-MAY-09 14:25:00 (EST-5)
Location: NORTH OLMSTED
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds downed a large tree limb.  The limb knocked some power lines down.

Thunderstorm Wind in LAKE, OHIO
From 27-MAY-09 14:25:00 to 27-MAY-09 14:25:00 (EST-5)
Location: MENTOR
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds downed a small tree.

Thunderstorm Wind in LAKE, OHIO
From 27-MAY-09 15:30:00 to 27-MAY-09 15:30:00 (EST-5)
Location: PAINESVILLE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds downed a tree.

Hail in PORTAGE, OHIO
From 27-MAY-09 16:10:00 to 27-MAY-09 16:10:00 (EST-5)
Location: KENT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny size hail was reported.

Flash Flood in OTTAWA, OHIO
From 27-MAY-09 13:33:00 to 27-MAY-09 19:00:00 (EST-5)
Location: PORT CLINTON
Flood cause: Heavy Rain
Property damage: 2.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Slow moving, training thunderstorms produced torrential rainfall in Port Clinton, flooding nearly every street in town.  Basement flooding was common due to the high water in the streets.  The hospital lobby experienced flooding starting around 2:33pm local time, with water one to two feet deep just outside the main entrance.  The foundation of a bank building at East 2nd and Madison collapsed around 3:55pm.  3.75 inches of rain fell in one hour at the sewage treatment plant between 1:30pm and 2:30pm.  Storm total rainfall of 5.1 inches was measured in Port Clinton, with 4.5 inches measured on Harbor Road just east of town.

Flash Flood in SANDUSKY, OHIO
From 27-MAY-09 13:50:00 to 27-MAY-09 19:30:00 (EST-5)
Location: SLAGER ARPT
Flood cause: Heavy Rain
Property damage: 1.25M
Crop damage: 20.00K
Reported by: Law Enforcement

Slow moving training thunderstorms developed across central and eastern portions of Sandusky County between 330pm and 5pm local time.  Torrential rainfall of up to 4.5 inches in two hours caused widespread flash flooding in Fremont.  Flooding was reported in both the Sheriff Department and Health Department buildings.  Many commercial and residential basements in Fremont flooded.  High water stranded cars on roadways throughout town, including  portions of US Route 20 and State Route 53.  Flash Flooding was also reported along Muskellunge Creek just west of Fremont.