Scattered supercell thunderstorms developed ahead of a cold front across the central and eastern portions of Middle Tennessee. Numerous reports of large hail and wind damage were received, with some hail as large as baseballs measured.  The hailstorm in Murfreesboro caused millions of dollars in damage, making it one of the worst on record in the state.

Hail in DAVIDSON, TENNESSEE
From 18-OCT-11 13:25:00 to 18-OCT-11 13:25:00 (CST-6)
Location: MADISON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny size hail was reported in Madison.

Hail in BEDFORD, TENNESSEE
From 18-OCT-11 13:58:00 to 18-OCT-11 13:58:00 (CST-6)
Location: SHELBYVILLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to golfball size was reported west of Shelbyville.

Hail in COFFEE, TENNESSEE
From 18-OCT-11 14:00:00 to 18-OCT-11 14:05:00 (CST-6)
Location: TULLAHOMA
Magnitude: 2.75 
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Trained Spotter

Hail ranging from quarter to baseball size damaged numerous cars, homes, businesses, and schools in and around Tullahoma. The majority of the hail was quarter to golfball size, but some hailstones were reportedly up to baseball size. Videos showed the hail fell for around five minutes.

Hail in MACON, TENNESSEE
From 18-OCT-11 14:06:00 to 18-OCT-11 14:06:00 (CST-6)
Location: ROCKY MOUND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in RUTHERFORD, TENNESSEE
From 18-OCT-11 14:20:00 to 18-OCT-11 14:20:00 (CST-6)
Location: COMPTON
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two trees were blown down with windows broken out in homes. Winds were estimated up to 65 mph.

Hail in WILSON, TENNESSEE
From 18-OCT-11 14:39:00 to 18-OCT-11 14:39:00 (CST-6)
Location: LEBANON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BEDFORD, TENNESSEE
From 18-OCT-11 15:55:00 to 18-OCT-11 15:55:00 (CST-6)
Location: RICHMOND
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WILSON, TENNESSEE
From 18-OCT-11 14:48:00 to 18-OCT-11 14:56:00 (CST-6)
Location: GREENWOOD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in CLAY, TENNESSEE
From 18-OCT-11 14:52:00 to 18-OCT-11 14:52:00 (CST-6)
Location: HERMITAGE SPGS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Thunderstorm Wind in WARREN, TENNESSEE
From 18-OCT-11 14:48:00 to 18-OCT-11 14:48:00 (CST-6)
Location: VIOLA
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Warren County 911 Center reported a power line blown down with hail of unknown size near Viola.

Thunderstorm Wind in GILES, TENNESSEE
From 18-OCT-11 15:50:00 to 18-OCT-11 15:50:00 (CST-6)
Location: PULASKI
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Trees were reportedly blown down on the north side of Pulaski with power outages in the area.

Hail in SUMNER, TENNESSEE
From 18-OCT-11 13:36:00 to 18-OCT-11 13:39:00 (CST-6)
Location: HENDERSONVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in RUTHERFORD, TENNESSEE
From 18-OCT-11 14:10:00 to 18-OCT-11 14:26:00 (CST-6)
Location: RUCKER
Magnitude: 2.75 
Property damage: 5.00M
Crop damage: 0.00K
Reported by: Trained Spotter

Hail ranging from quarter up to baseball size fell across a wide area from Barfield northward through central Murfreesboro and across the Murfreesboro Municipal Airport. Some hailstones were measured up to baseball size in Barfield, but most of the hail was quarter to golfball size from Murfreesboro northward to east of Walterhill. Hail also reportedly covered the ground in Murfreesboro. Thousands of cars were damaged by the hail, along with hundreds of homes and businesses, resulting in millions of dollars in damage. Up to two dozen planes at the Murfreesboro Municipal Airport were also battered by the hail resulting in $500,000 damage, including holes punctured in the wings of some planes. This was the worst known October hail storm in the history of Rutherford County.

Hail in COFFEE, TENNESSEE
From 18-OCT-11 14:20:00 to 18-OCT-11 14:25:00 (CST-6)
Location: MANCHESTER
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Half dollar to golfball size hail was reported in Manchester. Videos showed the hail fell for around five minutes.