This was a synoptic scale event.  A strong north to south temperature gradient existed along the Interstate 70 corridor in Ohio.  Low pressure moved out of Illinois in the morning, reaching western Pennsylvania by evening.
Individual thunderstorm cells developed in western Ohio and southern Indiana around midday.  Hail was initially the main impact, but higher wind gusts developed as the thunderstorm complex matured.
A separate batch of showers and thunderstorms developed closer to the cold front and reached into southeast Ohio during the late evening.

Hail in VINTON, OHIO
From 23-MAR-11 15:00:00 to 23-MAR-11 15:00:00 (EST-5)
Location: CREOLA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ATHENS, OHIO
From 23-MAR-11 15:40:00 to 23-MAR-11 15:40:00 (EST-5)
Location: ATHENS
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Mariner

Several trees were blown down.

Hail in ATHENS, OHIO
From 23-MAR-11 15:25:00 to 23-MAR-11 15:25:00 (EST-5)
Location: THE PLAINS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Post Office

Hail in ATHENS, OHIO
From 23-MAR-11 15:50:00 to 23-MAR-11 15:50:00 (EST-5)
Location: COOLVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PERRY, OHIO
From 23-MAR-11 14:30:00 to 23-MAR-11 14:30:00 (EST-5)
Location: THORNVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in LAWRENCE, OHIO
From 23-MAR-11 16:27:00 to 23-MAR-11 16:27:00 (EST-5)
Location: PROCTORVILLE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large branches were snapped off trees.  Minor roof damage occurred to a few homes.

Thunderstorm Wind in LAWRENCE, OHIO
From 23-MAR-11 16:15:00 to 23-MAR-11 16:15:00 (EST-5)
Location: LINNVILLE
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wind gust of 70 mph was measured by a spotter around Willow Wood.

Thunderstorm Wind in JACKSON, OHIO
From 23-MAR-11 16:00:00 to 23-MAR-11 16:00:00 (EST-5)
Location: OAK HILL
Magnitude: 56.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A barn and outbuildings were damaged.  A nearby roof to a home was damaged.

Hail in LAWRENCE, OHIO
From 23-MAR-11 22:50:00 to 23-MAR-11 22:50:00 (EST-5)
Location: PROCTORVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ATHENS, OHIO
From 23-MAR-11 15:15:00 to 23-MAR-11 15:15:00 (EST-5)
Location: ATHENS
Magnitude: 1.75 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large hail dented a few vehicles.

Hail in WASHINGTON, OHIO
From 23-MAR-11 15:55:00 to 23-MAR-11 15:55:00 (EST-5)
Location: LITTLE HOCKING
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHINGTON, OHIO
From 23-MAR-11 15:10:00 to 23-MAR-11 15:10:00 (EST-5)
Location: BEVERLY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in VINTON, OHIO
From 23-MAR-11 15:10:00 to 23-MAR-11 15:10:00 (EST-5)
Location: NEW PLYMOUTH
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Post Office