A very unstable airmass was in place south of a warm front in the area. This unstable airmass led to the development of widespread severe weather.

Hail in ROSS, OHIO
From 10-MAY-11 15:28:00 to 10-MAY-11 15:32:00 (EST-5)
Location: FRANKFORT
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in ROSS, OHIO
From 10-MAY-11 15:37:00 to 10-MAY-11 15:41:00 (EST-5)
Location: KNOCKEMSTIFF
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in SCIOTO, OHIO
From 10-MAY-11 15:28:00 to 10-MAY-11 15:32:00 (EST-5)
Location: PORTSMOUTH
Magnitude: 0.75 
Reported by: Public

Hail in MERCER, OHIO
From 10-MAY-11 15:16:00 to 10-MAY-11 15:20:00 (EST-5)
Location: MARIA STEIN
Magnitude: 0.88 
Reported by: Public

Hail in ROSS, OHIO
From 10-MAY-11 15:18:00 to 10-MAY-11 15:22:00 (EST-5)
Location: FRANKFORT
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in ROSS, OHIO
From 10-MAY-11 15:25:00 to 10-MAY-11 15:29:00 (EST-5)
Location: CHILLICOTHE
Magnitude: 0.75 
Reported by: Public

Hail in ROSS, OHIO
From 10-MAY-11 15:42:00 to 10-MAY-11 15:45:00 (EST-5)
Location: NORTH FORK VLG
Magnitude: 1.75 
Reported by: Public

Hail in SCIOTO, OHIO
From 10-MAY-11 15:40:00 to 10-MAY-11 15:44:00 (EST-5)
Location: SCIOTOVILLE
Magnitude: 0.75 
Reported by: Emergency Manager

Hail in ROSS, OHIO
From 10-MAY-11 15:41:00 to 10-MAY-11 15:45:00 (EST-5)
Location: CHLLCTH ROSS CO ARPT
Magnitude: 0.75 
Reported by: Public

Hail in MERCER, OHIO
From 10-MAY-11 17:05:00 to 10-MAY-11 17:15:00 (EST-5)
Location: ROCKFORD
Magnitude: 0.75 
Reported by: Trained Spotter

Hail in AUGLAIZE, OHIO
From 10-MAY-11 16:02:00 to 10-MAY-11 16:06:00 (EST-5)
Location: WAPAKONETA
Magnitude: 0.75 
Reported by: Law Enforcement

Hail in SCIOTO, OHIO
From 10-MAY-11 18:34:00 to 10-MAY-11 18:38:00 (EST-5)
Location: WHEELERSBURG
Magnitude: 0.88 
Reported by: Public

Hail in PICKAWAY, OHIO
From 10-MAY-11 21:10:00 to 10-MAY-11 21:14:00 (EST-5)
Location: TARLTON
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in ROSS, OHIO
From 10-MAY-11 21:13:00 to 10-MAY-11 21:17:00 (EST-5)
Location: THRIFTON
Magnitude: 1.00 
Reported by: Broadcast Media

Hail in ROSS, OHIO
From 10-MAY-11 22:25:00 to 10-MAY-11 22:29:00 (EST-5)
Location: BAINBRIDGE
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in ADAMS, OHIO
From 10-MAY-11 23:07:00 to 10-MAY-11 23:11:00 (EST-5)
Location: PEEBLES
Magnitude: 1.00 
Reported by: Public

Hail in ADAMS, OHIO
From 10-MAY-11 23:28:00 to 10-MAY-11 23:32:00 (EST-5)
Location: BLUE CREEK
Magnitude: 1.75 
Reported by: Public

Hail in CLARK, OHIO
From 10-MAY-11 23:48:00 to 10-MAY-11 23:52:00 (EST-5)
Location: SOUTH CHARLESTON
Magnitude: 1.25 
Reported by: Public

Hail in CLARK, OHIO
From 10-MAY-11 23:24:00 to 10-MAY-11 23:28:00 (EST-5)
Location: SOUTH VIENNA
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in CHAMPAIGN, OHIO
From 11-MAY-11 00:00:00 to 11-MAY-11 00:04:00 (EST-5)
Location: MUTUAL
Magnitude: 0.75 
Reported by: Public

Hail in FAYETTE, OHIO
From 11-MAY-11 00:20:00 to 11-MAY-11 00:24:00 (EST-5)
Location: WASHINGTON COURT HOU
Magnitude: 1.00 
Reported by: Public

Thunderstorm Wind in SCIOTO, OHIO
From 10-MAY-11 15:20:00 to 10-MAY-11 15:23:00 (EST-5)
Location: PORTSMOUTH
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were reported down due to damaging thunderstorm winds.

Hail in CHAMPAIGN, OHIO
From 11-MAY-11 00:25:00 to 11-MAY-11 00:29:00 (EST-5)
Location: URBANA
Magnitude: 1.00 
Reported by: Public

Hail in CLARK, OHIO
From 11-MAY-11 00:24:00 to 11-MAY-11 00:28:00 (EST-5)
Location: NEW MOOREFIELD
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in CLARK, OHIO
From 11-MAY-11 00:40:00 to 11-MAY-11 00:44:00 (EST-5)
Location: SOUTH CHARLESTON
Magnitude: 1.75 
Reported by: Public

Hail in CLARK, OHIO
From 11-MAY-11 00:59:00 to 11-MAY-11 01:03:00 (EST-5)
Location: SPRINGFIELD
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in CLINTON, OHIO
From 11-MAY-11 02:08:00 to 11-MAY-11 02:12:00 (EST-5)
Location: SABINA
Magnitude: 1.25 
Reported by: Public

Hail in LOGAN, OHIO
From 11-MAY-11 02:58:00 to 11-MAY-11 03:02:00 (EST-5)
Location: MC MORRAN
Magnitude: 1.00 
Reported by: Amateur Radio

Hail in SCIOTO, OHIO
From 10-MAY-11 17:35:00 to 10-MAY-11 17:39:00 (EST-5)
Location: SOUTH WEBSTER
Magnitude: 1.50 
Reported by: Public

Flash Flood in PICKAWAY, OHIO
From 10-MAY-11 17:44:00 to 10-MAY-11 17:48:00 (EST-5)
Location: HAYESVILLE
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two feet of water was flowing across roadways due to heavy rainfall.

Hail in SCIOTO, OHIO
From 10-MAY-11 15:51:00 to 10-MAY-11 15:55:00 (EST-5)
Location: WHEELERSBURG
Magnitude: 0.75 
Reported by: Public

Hail in FAYETTE, OHIO
From 10-MAY-11 22:17:00 to 10-MAY-11 22:21:00 (EST-5)
Location: JEFFERSONVILLE
Magnitude: 1.75 
Reported by: Public

Hail in MADISON, OHIO
From 11-MAY-11 01:07:00 to 11-MAY-11 01:11:00 (EST-5)
Location: LONDON
Magnitude: 0.88 
Reported by: Trained Spotter

Flash Flood in HOCKING, OHIO
From 10-MAY-11 18:00:00 to 11-MAY-11 00:00:00 (EST-5)
Location: LAURELVILLE
Flood cause: Heavy Rain
Property damage: 70.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several evacuations occurred, vehicles were washed off of roadways, and roads were closed due to flash flooding.

Flood in CLARK, OHIO
From 11-MAY-11 12:30:00 to 11-MAY-11 13:15:00 (EST-5)
Location: SOUTH VIENNA
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A few roads were closed in eastern and northeastern portions of the county due to heavy rainfall.

Flash Flood in CLARK, OHIO
From 11-MAY-11 01:58:00 to 11-MAY-11 05:00:00 (EST-5)
Location: CATAWBA
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

One and a half feet of water was reported over a road due to heavy rainfall.

Flash Flood in ROSS, OHIO
From 11-MAY-11 02:35:00 to 11-MAY-11 05:30:00 (EST-5)
Location: FRANKFORT
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Twenty residents were evacuated from their homes and two people were rescued from vehicles due to flash flooding.

Flash Flood in LOGAN, OHIO
From 11-MAY-11 02:58:00 to 11-MAY-11 05:00:00 (EST-5)
Location: MC MORRAN
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

One and a half feet of water was reported near a residence due to heavy rainfall.

Flash Flood in SCIOTO, OHIO
From 10-MAY-11 18:42:00 to 10-MAY-11 23:00:00 (EST-5)
Location: SOUTH WEBSTER
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: County Official

A dozen cars were submerged on a road and water rescues were needed due to the heavy rainfall.

Flash Flood in SCIOTO, OHIO
From 10-MAY-11 20:00:00 to 10-MAY-11 23:00:00 (EST-5)
Location: MINFORD
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: County Official

A water rescue occurred at a home due to flash flooding in the area.

Flash Flood in SCIOTO, OHIO
From 10-MAY-11 20:00:00 to 10-MAY-11 23:00:00 (EST-5)
Location: SOUTH WEBSTER
Flood cause: Heavy Rain
Property damage: 70.00K
Crop damage: 0.00K
Reported by: County Official

Water rescues were needed at several homes due to flash flooding.

Flash Flood in SCIOTO, OHIO
From 10-MAY-11 20:05:00 to 10-MAY-11 23:05:00 (EST-5)
Location: WHEELERSBURG
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A road was closed due to water flowing over the roadway.

Flash Flood in ROSS, OHIO
From 10-MAY-11 22:22:00 to 11-MAY-11 00:00:00 (EST-5)
Location: FRANKFORT
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several roads were closed due to heavy rainfall.

Flash Flood in ROSS, OHIO
From 10-MAY-11 22:41:00 to 11-MAY-11 00:00:00 (EST-5)
Location: BAINBRIDGE
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Water covered roadways and caused some road damage due to heavy rainfall.

Flash Flood in CLARK, OHIO
From 11-MAY-11 00:59:00 to 11-MAY-11 05:00:00 (EST-5)
Location: SPRINGFIELD
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several roads had a foot of moving water over them due to heavy rainfall.

Flash Flood in FAYETTE, OHIO
From 11-MAY-11 03:06:00 to 11-MAY-11 05:06:00 (EST-5)
Location: GOOD HOPE
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One family was evacuated from their residence due to flash flooding.

Flood in ROSS, OHIO
From 11-MAY-11 12:30:00 to 11-MAY-11 16:00:00 (EST-5)
Location: FRANKFORT
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple roads were closed due to high waters.

Flash Flood in HARDIN, OHIO
From 11-MAY-11 05:25:00 to 11-MAY-11 06:45:00 (EST-5)
Location: ALGER
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple roads were closed due to flash flooding.

Flood in LOGAN, OHIO
From 11-MAY-11 06:50:00 to 11-MAY-11 13:30:00 (EST-5)
Location: BELLEFONTAINE
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous roads were closed due to heavy rainfall.

Flood in ROSS, OHIO
From 11-MAY-11 07:29:00 to 11-MAY-11 08:30:00 (EST-5)
Location: NORTH FORK VLG
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several roads were closed due to heavy rainfall.

Flood in CHAMPAIGN, OHIO
From 11-MAY-11 06:11:00 to 11-MAY-11 13:00:00 (EST-5)
Location: URBANA
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Roads were flooded and vehicles were stalled in flood waters due to heavy rain.

Flood in CLARK, OHIO
From 11-MAY-11 08:40:00 to 11-MAY-11 13:00:00 (EST-5)
Location: SOUTH CHARLESTON
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A campground was evacuated due to heavy rainfall that caused flooding of the area.

Flood in FAYETTE, OHIO
From 11-MAY-11 08:50:00 to 11-MAY-11 13:00:00 (EST-5)
Location: WASHINGTON COURT HOU
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roads were closed due to high waters.

Flash Flood in CLARK, OHIO
From 11-MAY-11 06:09:00 to 11-MAY-11 07:09:00 (EST-5)
Location: SPRINGFIELD
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Three water rescues occurred due to flash flooding in the area.

Flood in SCIOTO, OHIO
From 10-MAY-11 23:00:00 to 12-MAY-11 12:00:00 (EST-5)
Location: JUNIOR FURNACE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Flooding that was caused by heavy rains on May 10th continued into the day on May 12th. A man wading through chest deep water along Pine Creek in southeast Scioto County Ohio was pulled under around 1000 on May 12, 2011.  His body was recovered during the early afternoon of May 12, 2011.

Flash Flood in MADISON, OHIO
From 11-MAY-11 03:10:00 to 11-MAY-11 05:10:00 (EST-5)
Location: SOUTH SOLON
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A road was closed due to flash flooding caused by heavy rain.

Flash Flood in CLARK, OHIO
From 11-MAY-11 02:30:00 to 11-MAY-11 05:30:00 (EST-5)
Location: SPRINGFIELD
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

One foot of water was reported over several roadways due to heavy rainfall.

Hail in PIKE, OHIO
From 10-MAY-11 15:19:00 to 10-MAY-11 15:23:00 (EST-5)
Location: BEAVER
Magnitude: 0.88 
Reported by: Public

Hail in SHELBY, OHIO
From 10-MAY-11 15:30:00 to 10-MAY-11 15:34:00 (EST-5)
Location: HOUSTON
Magnitude: 1.00 
Reported by: CoCoRaHS

Hail in FAYETTE, OHIO
From 10-MAY-11 22:42:00 to 10-MAY-11 22:46:00 (EST-5)
Location: WASHINGTON COURT HOU
Magnitude: 0.75 
Reported by: Public