A warm front lifted north across northern Ohio during the afternoon hours of May 31st.  A cold front followed during the evening.  Showers and thunderstorms developed in association with both of these fronts.   Slow moving thunderstorms produced heavy rainfall which caused flash flooding in a few areas.  Rainfall rates at times were between two and three inches per hour.  A few locations received more than four inches of rainfall.  The flooding was the worst in western Geauga County were the damage was extensive.  A few storms also became severe with minor damage reported.

Flash Flood in CRAWFORD, OHIO
From 31-MAY-10 17:36:00 to 31-MAY-10 19:00:00 (EST-5)
Location: RIDGETON
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Slow moving thunderstorms moved across portions of Seneca, Wyandot, Marion and Crawford Counties.  Rainfall rates exceeded two inches per hour at times causing many streams and creeks to leave their banks.  A trained spotter measured a storm total of 3.41 inches of rainfall in Bucyrus.   Many roads and streets had to be closed because of flooding.  The flooding was the worst along the U.S. Route 30 corridor in Wyandot and Crawford Counties.  Between one and two feet of swiftly flowing water was reported on State Route 4 in Bucyrus.  At least one vehicle became stranded in the flood waters.  Many homes sustained damage, mainly from basement flooding.

Flash Flood in ERIE, OHIO
From 31-MAY-10 16:44:00 to 31-MAY-10 19:00:00 (EST-5)
Location: CASTALIA
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Slow moving thunderstorms dumped locally heavy rainfall on portions of Erie and Sandusky Counties.  Rainfall rates at times were between two and three inches per hour.  A storm total of 3.98 inches of rainfall was measured in Bellevue with 3.48 inches reported a mile north of Bellevue.  A spotter in Bloomingville measured a total of 3.90 inches of rain.  Widespread flooding occurred across southwestern Erie County, northwestern Huron County and eastern Sandusky County.  The worst flooding was in the Bellevue area.  To the north of Bellevue, State Route 269 along with Hale, Potter and Portland Roads had be be closed because of flooding.  Over two feet of water was also reported on U.S Route 20 in Bellevue.   Several cars became stranded in the flood waters.  Many other secondary roads in the area also experienced flooding.  Several dozens homes sustained damage, mainly from basement flooding.

Hail in GEAUGA, OHIO
From 31-MAY-10 12:13:00 to 31-MAY-10 12:13:00 (EST-5)
Location: CHARDON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail was observed.

Thunderstorm Wind in LUCAS, OHIO
From 31-MAY-10 11:51:00 to 31-MAY-10 11:51:00 (EST-5)
Location: MAUMEE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Thunderstorm winds downed a couple large tree limbs.

Thunderstorm Wind in WOOD, OHIO
From 31-MAY-10 11:51:00 to 31-MAY-10 11:51:00 (EST-5)
Location: PERRYSBURG
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm winds snapped a couple power poles and large tree limbs.

Hail in SENECA, OHIO
From 31-MAY-10 11:48:00 to 31-MAY-10 11:48:00 (EST-5)
Location: TIFFIN
Magnitude: 1.25 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Half dollar sized hail was observed.

Flash Flood in ASHTABULA, OHIO
From 31-MAY-10 13:45:00 to 31-MAY-10 16:00:00 (EST-5)
Location: CLARK CORNERS
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Slow moving thunderstorms dumped locally heavy rainfall on portions of Ashtabula County.  Rainfall rates at times were more than two inches per hour.  Small streams and creeks in the northeastern corner of the county left their banks causing some flooding.  State Route 7 was flooded in three locations between State Route 84 and Hildom Road.  Water flowing over the ground leaked into the basement of a home along State Route 7 and caused a fair amount of damage.  Several secondary roads in the area also had to be closed because of flooding.  Local residents indicated that this flooding was the worst they had seen in the area in nearly 40 years.

Flash Flood in GEAUGA, OHIO
From 31-MAY-10 12:55:00 to 31-MAY-10 16:00:00 (EST-5)
Location: CHARDON
Flood cause: Heavy Rain
Property damage: 4.50M
Crop damage: 0.00K
Reported by: Law Enforcement

Slow moving thunderstorms dumped locally heavy rainfall on portions of Lake, Geauga and Cuyahoga Counties.  Rainfall rates of between two and three inches per hour caused flash flooding.  The worst flooding occurred in Chester Township in northwestern Geauga County.  An automated rain gauge just east of Chesterland measured 3.62 inches of rain with most of this rainfall falling between noon and 1:30 pm.  Flooding along several streams and small rivers was reported in Chester Township.  Extensive flooding was reported in a neighborhood just southwest of the intersection of U.S. Route 322 and State Route 306.  Homes along Marilyn Drive and Wyandot Road had up to two feet of water on their ground floors.  Several people had to be rescued from their homes.  A large portion of the downtown business district in Chesterland saw flood waters at least two feet deep.  Extensive damage was reported to most of the businesses.  Portions of U.S Route 322 and State Route 306 were washed out.  Damage was also reported to several other state routes in the area.  Significant flooding was also reported along County Line Road in Chagrin Falls.   Dozens of streets had to be briefly closed because of flooding.  An 18 year old had to be rescued from the Chagrin River in Russell Township.  Flood waters reportedly toppled many trees along the river near where rescue occurred. The West Geauga School District had to cancel classes on June 1st because of flood damage.   Hundreds of homes sustained flood damages during this event.  Most of the damage was from basement flooding, but a few dozen buildings and homes did sustain major damage.

Thunderstorm Wind in PORTAGE, OHIO
From 31-MAY-10 11:25:00 to 31-MAY-10 11:25:00 (EST-5)
Location: SUFFIELD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds toppled many trees in Suffield Township.

Thunderstorm Wind in LUCAS, OHIO
From 31-MAY-10 12:05:00 to 31-MAY-10 12:05:00 (EST-5)
Location: MAUMEE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds downed a couple small trees.

Thunderstorm Wind in HANCOCK, OHIO
From 31-MAY-10 14:21:00 to 31-MAY-10 14:21:00 (EST-5)
Location: FINDLAY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds were estimated to be 60 mph.

Thunderstorm Wind in ASHTABULA, OHIO
From 31-MAY-10 12:48:00 to 31-MAY-10 12:48:00 (EST-5)
Location: ASHTABULA CO ARPT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

An automated sensor at the Ashtabula County Airport measured a 60 mph thunderstorm wind gust.

Thunderstorm Wind in HURON, OHIO
From 31-MAY-10 19:29:00 to 31-MAY-10 19:29:00 (EST-5)
Location: NORWALK
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds downed a large tree.