Strong instability developed during the afternoon of the 21st to the south of a weak boundary sliding south across central Indiana. A shortwave moving across the western Great Lakes contributed to steep low level lapse rates and strong mid-level winds that supported several rounds of strong convection. During the late afternoon, a southeastward-moving bow echo brought wind damage and minor flooding to southeastern Indiana. Throughout the rest of the evening and the early morning hours on the 22nd, several additional rounds of convection, each one just west of the previous round, would bring additional severe weather.  Overnight convection was aided by a strong low level southwesterly jet and the presence of pre-existing boundaries.

Flash Flood in JEFFERSON, INDIANA
From 21-MAY-14 20:01:00 to 21-MAY-14 20:01:00 (EST-5)
Location: MADISON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hanging Rock Hill Road was closed due to high water. A radar estimated rainfall of 2 to 3 inches fell within a two hour period.

Hail in JEFFERSON, INDIANA
From 21-MAY-14 18:50:00 to 21-MAY-14 18:50:00 (EST-5)
Location: ANTIOCH GRANGE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter just west of Madison reported 1 inch hail.

Hail in CLARK, INDIANA
From 21-MAY-14 20:24:00 to 21-MAY-14 20:24:00 (EST-5)
Location: SELLERSBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail was reported in Sellersburg.

Hail in CLARK, INDIANA
From 21-MAY-14 20:28:00 to 21-MAY-14 20:28:00 (EST-5)
Location: ST JOSEPH HILL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter 2 miles southwest of Sellersburg saw 1 inch hail.

Hail in FLOYD, INDIANA
From 21-MAY-14 20:31:00 to 21-MAY-14 20:31:00 (EST-5)
Location: ST JOSEPH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CRAWFORD, INDIANA
From 22-MAY-14 02:48:00 to 22-MAY-14 02:48:00 (EST-5)
Location: SULPHUR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported a large amount of quarter sized hail that whitened the ground just northeast of Sulfur Springs.

Thunderstorm Wind in SCOTT, INDIANA
From 22-MAY-14 00:11:00 to 22-MAY-14 00:11:00 (EST-5)
Location: SCOTTSBURG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Scott County emergency management reported several trees down countywide.

Thunderstorm Wind in HARRISON, INDIANA
From 22-MAY-14 02:20:00 to 22-MAY-14 02:20:00 (EST-5)
Location: NEW SALISBURY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

New Salisbury law enforcement reported a tree down across a road.

Hail in FLOYD, INDIANA
From 21-MAY-14 20:33:00 to 21-MAY-14 20:33:00 (EST-5)
Location: NEW ALBANY
Magnitude: 1.25 
Crop damage: 0.00K
Reported by: Broadcast Media

Local media relayed a report of 1.25 inch hail just north of Interstate 64 in New Albany.

Thunderstorm Wind in WASHINGTON, INDIANA
From 22-MAY-14 00:10:00 to 22-MAY-14 00:10:00 (EST-5)
Location: SALEM
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported that a tree fell onto a home in Salem.

Hail in CRAWFORD, INDIANA
From 22-MAY-14 02:43:00 to 22-MAY-14 02:43:00 (EST-5)
Location: RIDDLE
Magnitude: 1.75 
Reported by: Trained Spotter

A storm that interacted with a previous boundary briefly acquired supercell characteristics and produced golf ball sized hail near Riddle.