By late afternoon on April 28th, a stationary boundary lay across southwestern Indiana from Dubois County to near Louisville. This boundary separated a capped but very unstable air mass on its south side from cooler air to the north.  Early in the afternoon severe storms developed across southern Illinois.  One storm developed into a high precipitation supercell and moved southeast right along this boundary.  It spread a lengthy path of golf-ball to occasionally tennis ball sized hail from Orange County, Indiana to just west of Louisville, Kentucky.

Hail in ORANGE, INDIANA
From 28-APR-12 17:57:00 to 28-APR-12 17:57:00 (EST-5)
Location: YOUNGS CREEK
Magnitude: 1.50 
Reported by: NWS Employee

Hail in CRAWFORD, INDIANA
From 28-APR-12 18:02:00 to 28-APR-12 18:02:00 (EST-5)
Location: ENGLISH
Magnitude: 1.00 
Reported by: Law Enforcement

Thunderstorm Wind in CRAWFORD, INDIANA
From 28-APR-12 18:05:00 to 28-APR-12 18:05:00 (EST-5)
Location: MARENGO
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Crawford County emergency management reported power lines down near Marengo. Also, several vehicles were damaged by hail.

Hail in WASHINGTON, INDIANA
From 28-APR-12 18:18:00 to 28-APR-12 18:18:00 (EST-5)
Location: FREDDRICKSBURG
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in HARRISON, INDIANA
From 28-APR-12 18:22:00 to 28-APR-12 18:22:00 (EST-5)
Location: PALMYRA
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in HARRISON, INDIANA
From 28-APR-12 18:20:00 to 28-APR-12 18:20:00 (EST-5)
Location: RAMSEY
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in HARRISON, INDIANA
From 28-APR-12 18:25:00 to 28-APR-12 18:25:00 (EST-5)
Location: NEW SALISBURY
Magnitude: 1.75 
Reported by: Trained Spotter

Thunderstorm Wind in HARRISON, INDIANA
From 28-APR-12 18:25:00 to 28-APR-12 18:25:00 (EST-5)
Location: NEW SALISBURY
Magnitude: 60.00 EG
Reported by: Law Enforcement

Local emergency management reported several trees down near New Salisbury.

Hail in HARRISON, INDIANA
From 28-APR-12 18:30:00 to 28-APR-12 18:30:00 (EST-5)
Location: CRANDALL
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in HARRISON, INDIANA
From 28-APR-12 18:31:00 to 28-APR-12 18:31:00 (EST-5)
Location: CRANDALL
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in FLOYD, INDIANA
From 28-APR-12 18:39:00 to 28-APR-12 18:39:00 (EST-5)
Location: GEORGETOWN
Magnitude: 1.75 
Reported by: Emergency Manager

Thunderstorm Wind in HARRISON, INDIANA
From 28-APR-12 18:30:00 to 28-APR-12 18:30:00 (EST-5)
Location: BRADFORD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Local media reported that power lines were downed near Bradford.

Hail in ORANGE, INDIANA
From 28-APR-12 17:43:00 to 28-APR-12 17:43:00 (EST-5)
Location: FRENCH LICK MUNI ARP
Magnitude: 2.75 
Reported by: Law Enforcement

Law enforcement reported baseball sized hail near the French Lick Municipal Airport.

Hail in CRAWFORD, INDIANA
From 28-APR-12 18:12:00 to 28-APR-12 18:12:00 (EST-5)
Location: MILLTOWN
Magnitude: 1.75 
Reported by: Emergency Manager

Golf ball sized hail fell in Milltown.  A separate report of 1 inch hail was relayed by a spotter.