Severe thunderstorm watch number 316 was issued at 1530 EST for nearly all of the southern half of Indiana, in addition to sections of neighboring states, with expectations of storms increasing in number and intensity across the watch area due to a destabilizing atmosphere from strong daytime heating. Atmospheric shear of 35 to 45 knots and MLCAPES at or above 2000 J/Kg provided further fuel for severe weather.  With these parameters, the primary threat was large hail and damaging winds.  An additional severe thunderstorm watch, number 317, was issued at 1830 EST to include much of the area north of watch number 316 to account for storms that developed along a residual frontal zone stretching between a weak frontal wave/low across the Illinois/Indiana border and the Ohio River in southern Ohio.

Thunderstorm Wind in HAMILTON, INDIANA
From 30-MAY-09 19:19:00 to 30-MAY-09 19:19:00 (EST-5)
Location: SHERIDAN
Magnitude: 52.00 EG
Reported by: Law Enforcement

Thunderstorm wind gusts were estimated to be at least 60 MPH.  Dime size hail accompanied these winds.

Hail in BOONE, INDIANA
From 30-MAY-09 19:33:00 to 30-MAY-09 19:35:00 (EST-5)
Location: ROSSTON
Magnitude: 0.75 
Reported by: Amateur Radio

Hail in CARROLL, INDIANA
From 30-MAY-09 19:11:00 to 30-MAY-09 19:13:00 (EST-5)
Location: FLORA
Magnitude: 1.00 
Reported by: Law Enforcement

Hail in HENDRICKS, INDIANA
From 30-MAY-09 21:06:00 to 30-MAY-09 21:08:00 (EST-5)
Location: MAPLEWOOD
Magnitude: 1.00 
Reported by: Amateur Radio

Hail in HENDRICKS, INDIANA
From 30-MAY-09 21:25:00 to 30-MAY-09 21:27:00 (EST-5)
Location: PLAINFIELD
Magnitude: 1.00 
Reported by: CoCoRaHS

Hail in HENRY, INDIANA
From 30-MAY-09 18:52:00 to 30-MAY-09 18:54:00 (EST-5)
Location: STRAUGHN
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in FOUNTAIN, INDIANA
From 30-MAY-09 19:51:00 to 30-MAY-09 19:53:00 (EST-5)
Location: COVINGTON
Magnitude: 1.25 
Reported by: Trained Spotter

Hail up to half dollar size was reported by a trained spotter near Covington, Indiana.

Hail in HANCOCK, INDIANA
From 30-MAY-09 20:21:00 to 30-MAY-09 20:23:00 (EST-5)
Location: MT COMFORT
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in HANCOCK, INDIANA
From 30-MAY-09 20:25:00 to 30-MAY-09 20:25:00 (EST-5)
Location: MT COMFORT
Magnitude: 60.00 EG
Reported by: Trained Spotter

Thunderstorm winds blew down trees and limbs near the Mount Comfort, Indiana exit of Interstate 70.  Dime size hail accompanied this thunderstorm.

Hail in MARION, INDIANA
From 30-MAY-09 20:00:00 to 30-MAY-09 20:02:00 (EST-5)
Location: RAVENSWOOD
Magnitude: 1.00 
Reported by: Amateur Radio

Quarter size hail fell in the proximity of the intersection of Keystone and 74th Street in Indianapolis.

Hail in MARION, INDIANA
From 30-MAY-09 20:15:00 to 30-MAY-09 20:17:00 (EST-5)
Location: LAWRENCE
Magnitude: 0.75 
Reported by: Amateur Radio

Hail in MARION, INDIANA
From 30-MAY-09 20:20:00 to 30-MAY-09 20:22:00 (EST-5)
Location: LAWRENCE
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in HOWARD, INDIANA
From 30-MAY-09 19:05:00 to 30-MAY-09 19:07:00 (EST-5)
Location: RUSSIAVILLE
Magnitude: 0.75 
Reported by: Amateur Radio

Hail in MARION, INDIANA
From 30-MAY-09 19:55:00 to 30-MAY-09 19:57:00 (EST-5)
Location: ALLISONVILLE
Magnitude: 1.75 
Reported by: Amateur Radio

Golf ball size hail fell in the proximity of the intersection of 86th Street and Allisonville Road.

Hail in MARION, INDIANA
From 30-MAY-09 19:55:00 to 30-MAY-09 19:57:00 (EST-5)
Location: CASTLETON
Magnitude: 0.75 
Reported by: Amateur Radio

Thunderstorm Wind in MONTGOMERY, INDIANA
From 30-MAY-09 19:55:00 to 30-MAY-09 19:57:00 (EST-5)
Location: CRAWFORDSVILLE
Magnitude: 61.00 EG
Reported by: Broadcast Media

One-inch hail was also reported and is documented separately within this publication.

Hail in SHELBY, INDIANA
From 30-MAY-09 21:00:00 to 30-MAY-09 21:02:00 (EST-5)
Location: MORRISTOWN
Magnitude: 1.75 
Reported by: Amateur Radio

Hail in MARION, INDIANA
From 30-MAY-09 21:20:00 to 30-MAY-09 21:24:00 (EST-5)
Location: VALLEY MILLS
Magnitude: 0.75 
Reported by: Official NWS Observations

Hail in MONTGOMERY, INDIANA
From 30-MAY-09 19:55:00 to 30-MAY-09 19:57:00 (EST-5)
Location: CRAWFORDSVILLE
Magnitude: 1.00 
Reported by: Broadcast Media

Estimated thunderstorm wind gusts up to 70 MPH were reported as well in addition to the hail.  This wind event is also documented separately within this publication.

Hail in FOUNTAIN, INDIANA
From 30-MAY-09 19:50:00 to 30-MAY-09 19:52:00 (EST-5)
Location: COVINGTON
Magnitude: 0.75 
Reported by: Trained Spotter