Thunderstorms developed in an air mass south of an east through west frontal boundary across Central East through Southeast Tennessee. The atmosphere just ahead of the front was moderately unstable and uncapped with steep lapse rates and 40-50 knots of shear. Most of the storm reports included hail ranging in size from a penny to as large as a quarter. however, baseball size hail was also reported right in the middle of the thunderstorm watch area across Southeast Tennessee.

Thunderstorm Wind in BLEDSOE, TENNESSEE
From 20-MAY-08 13:10:00 to 20-MAY-08 13:10:00 (CST-6)
Location: BELLVIEW
Magnitude: 55.00 EG
Reported by: Law Enforcement

One tree was reported down on Big Spring Road and another tree was down on Miller Road.

Hail in BRADLEY, TENNESSEE
From 20-MAY-08 16:20:00 to 20-MAY-08 16:20:00 (EST-5)
Location: FELKER
Magnitude: 1.00 
Reported by: Law Enforcement

Quarter sized hail was reported across the southern half of the county.

Thunderstorm Wind in BRADLEY, TENNESSEE
From 20-MAY-08 16:15:00 to 20-MAY-08 16:15:00 (EST-5)
Location: FLINT SPGS
Magnitude: 55.00 EG
Reported by: Law Enforcement

One tree was reported down on Poteet Road.

Hail in MONROE, TENNESSEE
From 20-MAY-08 15:25:00 to 20-MAY-08 15:25:00 (EST-5)
Location: CHESTNUT VLY
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter sized hail was reported six miles east northeast of Tellico Plains.

Hail in MONROE, TENNESSEE
From 20-MAY-08 15:27:00 to 20-MAY-08 15:27:00 (EST-5)
Location: CHESTNUT VLY
Magnitude: 2.75 
Reported by: Trained Spotter

Hail continued and increased to baseball size.

Thunderstorm Wind in MONROE, TENNESSEE
From 20-MAY-08 15:00:00 to 20-MAY-08 15:00:00 (EST-5)
Location: MC GHEE
Magnitude: 55.00 EG
Reported by: Amateur Radio

Several trees and power lines were reported down in Vonore and the surrounding area.

Thunderstorm Wind in MONROE, TENNESSEE
From 20-MAY-08 15:25:00 to 20-MAY-08 15:25:00 (EST-5)
Location: TOQUA
Magnitude: 55.00 EG
Reported by: Trained Spotter

Several trees were reported down two miles southeast of Vonore.

Thunderstorm Wind in MONROE, TENNESSEE
From 20-MAY-08 16:20:00 to 20-MAY-08 16:20:00 (EST-5)
Location: SOUTH CENTER
Magnitude: 55.00 EG
Reported by: Law Enforcement

Numerous trees and power lines were reported down across the eastern half of the county.

Thunderstorm Wind in MONROE, TENNESSEE
From 20-MAY-08 15:00:00 to 20-MAY-08 15:00:00 (EST-5)
Location: MC GHEE
Magnitude: 52.00 EG
Reported by: Amateur Radio

Winds were estimated at 60 miles an hour in Vonore.

Hail in UNICOI, TENNESSEE
From 20-MAY-08 14:30:00 to 20-MAY-08 14:30:00 (EST-5)
Location: ROCK CREEK
Magnitude: 0.75 
Reported by: Law Enforcement

Penny sized hail was reported in Erwin.

Hail in GREENE, TENNESSEE
From 20-MAY-08 14:20:00 to 20-MAY-08 14:20:00 (EST-5)
Location: ROCKWOOD HILL
Magnitude: 0.75 
Reported by: Law Enforcement

Penny sized hail was reported near Greeneville.

Thunderstorm Wind in GREENE, TENNESSEE
From 20-MAY-08 14:50:00 to 20-MAY-08 14:50:00 (EST-5)
Location: ALEXANDER MILL
Magnitude: 55.00 EG
Reported by: Utility Company

A couple of trees and power lines were reported down.

Hail in HAMILTON, TENNESSEE
From 20-MAY-08 15:38:00 to 20-MAY-08 15:38:00 (EST-5)
Location: BRAINERD
Magnitude: 1.00 
Reported by: Law Enforcement

Quarter sized hail was reported in East Ridge.

Hail in MONROE, TENNESSEE
From 20-MAY-08 14:50:00 to 20-MAY-08 14:50:00 (EST-5)
Location: MC GHEE
Magnitude: 0.88 
Reported by: Trained Spotter

Nickel sized hail was reported in Vonore.

Hail in MONROE, TENNESSEE
From 20-MAY-08 15:00:00 to 20-MAY-08 15:00:00 (EST-5)
Location: MC GHEE
Magnitude: 1.00 
Reported by: Amateur Radio

Quarter sized hail was reported in Vonore.