An upper level jet stream tracking through the Ohio Valley combined with low pressure at the surface to produce severe thunderstorms during the afternoon of March 23rd. Several supercells developed producing large hail.  There were also a few thunderstorm line segments with damaging wind gusts ahead of drier air rapidly advancing from the west. A second round of thunderstorms occurred closer to the main cold front during the evening of March 23rd to just after midnight on March 24th.

Hail in DELAWARE, OHIO
From 23-MAR-11 15:01:00 to 23-MAR-11 15:06:00 (EST-5)
Location: AFRICA
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in ADAMS, OHIO
From 23-MAR-11 15:08:00 to 23-MAR-11 15:12:00 (EST-5)
Location: WINCHESTER
Magnitude: 60.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

The frame of a commercial barn was blown fifty feet from the foundation.

Thunderstorm Wind in PIKE, OHIO
From 23-MAR-11 15:34:00 to 23-MAR-11 15:38:00 (EST-5)
Location: PIKETON
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A house trailer that was being towed was blown over due to damaging thunderstorm winds.

Thunderstorm Wind in PIKE, OHIO
From 23-MAR-11 15:35:00 to 23-MAR-11 15:39:00 (EST-5)
Location: WAKEFIELD
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power lines were reported down due to damaging thunderstorm winds.

Thunderstorm Wind in SCIOTO, OHIO
From 23-MAR-11 15:42:00 to 23-MAR-11 15:43:00 (EST-5)
Location: PORTSMOUTH
Magnitude: 66.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees were reported down due to damaging thunderstorm winds.

Hail in DARKE, OHIO
From 23-MAR-11 14:02:00 to 23-MAR-11 14:06:00 (EST-5)
Location: GREENVILLE
Magnitude: 0.88 
Reported by: Law Enforcement

Hail in ROSS, OHIO
From 23-MAR-11 14:20:00 to 23-MAR-11 14:24:00 (EST-5)
Location: FRANKFORT
Magnitude: 0.75 
Reported by: Amateur Radio

Hail in MIAMI, OHIO
From 23-MAR-11 14:30:00 to 23-MAR-11 14:36:00 (EST-5)
Location: TROY
Magnitude: 0.75 
Reported by: County Official

Hail in ROSS, OHIO
From 23-MAR-11 14:31:00 to 23-MAR-11 14:35:00 (EST-5)
Location: CHILLICOTHE
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in FRANKLIN, OHIO
From 23-MAR-11 15:00:00 to 23-MAR-11 15:04:00 (EST-5)
Location: DUBLIN
Magnitude: 0.75 
Reported by: Amateur Radio

Hail in FRANKLIN, OHIO
From 23-MAR-11 15:23:00 to 23-MAR-11 15:27:00 (EST-5)
Location: DUBLIN
Magnitude: 0.75 
Reported by: Trained Spotter

Thunderstorm Wind in FAIRFIELD, OHIO
From 23-MAR-11 15:46:00 to 23-MAR-11 15:47:00 (EST-5)
Location: LNCSTER FRFLD CO ARP
Magnitude: 52.00 MG
Reported by: ASOS

Hail in MIAMI, OHIO
From 23-MAR-11 14:35:00 to 23-MAR-11 14:40:00 (EST-5)
Location: TROY
Magnitude: 1.00 
Reported by: Public

Hail in ROSS, OHIO
From 23-MAR-11 14:18:00 to 23-MAR-11 14:22:00 (EST-5)
Location: FRANKFORT
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in BUTLER, OHIO
From 23-MAR-11 13:02:00 to 23-MAR-11 13:06:00 (EST-5)
Location: MAUD
Magnitude: 1.00 
Reported by: Public

Hail in ROSS, OHIO
From 23-MAR-11 14:31:00 to 23-MAR-11 14:35:00 (EST-5)
Location: CHILLICOTHE
Magnitude: 1.75 
Reported by: Public

Hail in ADAMS, OHIO
From 23-MAR-11 21:52:00 to 23-MAR-11 21:56:00 (EST-5)
Location: BENTONVILLE
Magnitude: 1.00 
Reported by: Public

Hail in DARKE, OHIO
From 23-MAR-11 20:09:00 to 23-MAR-11 20:13:00 (EST-5)
Location: GREENVILLE
Magnitude: 0.75 
Reported by: Trained Spotter

Hail in HAMILTON, OHIO
From 23-MAR-11 21:12:00 to 23-MAR-11 21:16:00 (EST-5)
Location: HARRISON
Magnitude: 0.88 
Reported by: Public

Hail in WARREN, OHIO
From 23-MAR-11 12:55:00 to 23-MAR-11 12:59:00 (EST-5)
Location: MASON
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in WARREN, OHIO
From 23-MAR-11 13:23:00 to 23-MAR-11 13:27:00 (EST-5)
Location: MORROW
Magnitude: 0.88 
Reported by: Public

Hail in CLINTON, OHIO
From 23-MAR-11 13:40:00 to 23-MAR-11 13:44:00 (EST-5)
Location: WILMINGTON
Magnitude: 0.75 
Reported by: Public

Hail in FAYETTE, OHIO
From 23-MAR-11 13:53:00 to 23-MAR-11 13:57:00 (EST-5)
Location: WASHINGTON COURT HOU
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in BUTLER, OHIO
From 23-MAR-11 14:01:00 to 23-MAR-11 14:05:00 (EST-5)
Location: MIDDLETOWN
Magnitude: 0.88 
Reported by: Public

Hail in CLINTON, OHIO
From 23-MAR-11 13:29:00 to 23-MAR-11 13:34:00 (EST-5)
Location: BLANCHESTER
Magnitude: 1.25 
Reported by: Public

Thunderstorm Wind in BUTLER, OHIO
From 23-MAR-11 13:07:00 to 23-MAR-11 13:12:00 (EST-5)
Location: MIDDLETOWN
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Two trees were reported down due to damaging thunderstorm winds.

Hail in HIGHLAND, OHIO
From 23-MAR-11 14:04:00 to 23-MAR-11 14:09:00 (EST-5)
Location: GREENFIELD
Magnitude: 1.75 
Reported by: Public

Hail in SCIOTO, OHIO
From 23-MAR-11 22:28:00 to 23-MAR-11 22:32:00 (EST-5)
Location: PORTSMOUTH
Magnitude: 0.75 
Reported by: Trained Spotter

Hail in SCIOTO, OHIO
From 23-MAR-11 22:34:00 to 23-MAR-11 22:38:00 (EST-5)
Location: WHEELERSBURG
Magnitude: 0.75 
Reported by: Trained Spotter

Hail in BUTLER, OHIO
From 23-MAR-11 14:05:00 to 23-MAR-11 14:09:00 (EST-5)
Location: HAMILTON
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in HAMILTON, OHIO
From 23-MAR-11 14:18:00 to 23-MAR-11 14:21:00 (EST-5)
Location: INDIAN HILL VLG
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large tree was blown down onto a car.  One person in the car was injured.

Thunderstorm Wind in HIGHLAND, OHIO
From 23-MAR-11 15:02:00 to 23-MAR-11 15:06:00 (EST-5)
Location: EAST DANVILLE
Magnitude: 55.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

A greenhouse collapsed due to damaging thunderstorm winds.  One woman was injured inside the greenhouse when it collapsed.

Hail in CLINTON, OHIO
From 23-MAR-11 14:21:00 to 23-MAR-11 14:25:00 (EST-5)
Location: CLARKSVILLE
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in ROSS, OHIO
From 23-MAR-11 14:38:00 to 23-MAR-11 14:42:00 (EST-5)
Location: ADELPHI
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in CLINTON, OHIO
From 23-MAR-11 14:44:00 to 23-MAR-11 14:48:00 (EST-5)
Location: MARTINSVILLE
Magnitude: 1.25 
Reported by: Public

Thunderstorm Wind in CLERMONT, OHIO
From 23-MAR-11 14:40:00 to 23-MAR-11 14:44:00 (EST-5)
Location: NEW RICHMOND
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Large branches were broken due to damaging thunderstorm winds.

Thunderstorm Wind in BROWN, OHIO
From 23-MAR-11 15:10:00 to 23-MAR-11 15:14:00 (EST-5)
Location: RUSSELLVILLE
Magnitude: 52.00 MG
Reported by: Amateur Radio

Thunderstorm Wind in FAYETTE, OHIO
From 23-MAR-11 14:48:00 to 23-MAR-11 14:52:00 (EST-5)
Location: STAUNTON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power poles were blown down due to damaging thunderstorm winds.

Thunderstorm Wind in HIGHLAND, OHIO
From 23-MAR-11 15:01:00 to 23-MAR-11 15:05:00 (EST-5)
Location: BELFAST
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A roof was blown off of a garage due to damaging thunderstorm winds.

Thunderstorm Wind in HIGHLAND, OHIO
From 23-MAR-11 15:03:00 to 23-MAR-11 15:07:00 (EST-5)
Location: FAIRFAX
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees were reported down due to damaging thunderstorm winds.

Thunderstorm Wind in ADAMS, OHIO
From 23-MAR-11 15:10:00 to 23-MAR-11 15:11:00 (EST-5)
Location: CHERRY FORK
Magnitude: 56.00 MG
Reported by: Amateur Radio

Thunderstorm Wind in ADAMS, OHIO
From 23-MAR-11 15:34:00 to 23-MAR-11 15:38:00 (EST-5)
Location: PEEBLES
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees and power lines were reported down due to damaging thunderstorm winds.

Hail in FRANKLIN, OHIO
From 23-MAR-11 15:05:00 to 23-MAR-11 15:09:00 (EST-5)
Location: DUBLIN
Magnitude: 1.75 
Reported by: Public

Thunderstorm Wind in SCIOTO, OHIO
From 23-MAR-11 15:42:00 to 23-MAR-11 15:43:00 (EST-5)
Location: CAMP OYO
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A woman was killed by a falling tree while she was camping at the Shawnee State Forest.

Thunderstorm Wind in BROWN, OHIO
From 23-MAR-11 15:25:00 to 23-MAR-11 15:26:00 (EST-5)
Location: ABERDEEN
Magnitude: 52.00 EG
Reported by: Public

The wind gust was estimated.

Hail in ROSS, OHIO
From 23-MAR-11 14:39:00 to 23-MAR-11 14:43:00 (EST-5)
Location: KINGSTON
Magnitude: 1.00 
Reported by: Amateur Radio

Hail in CHAMPAIGN, OHIO
From 23-MAR-11 14:36:00 to 23-MAR-11 14:40:00 (EST-5)
Location: NORTH LEWISBURG
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in MIAMI, OHIO
From 23-MAR-11 14:15:00 to 23-MAR-11 14:19:00 (EST-5)
Location: COVINGTON
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in FAYETTE, OHIO
From 23-MAR-11 13:43:00 to 23-MAR-11 13:48:00 (EST-5)
Location: WASHINGTON COURT HOU
Magnitude: 1.00 
Reported by: Trained Spotter