Organized convection developed over the Southern Appalachian region in the presence of a very moist and unstable air mass.  Relatively strong winds through a deep portion of the atmosphere helped to produce an extensive outflow boundary resulting in numerous downed trees and significant structural damage to homes and businesses. The powerful thunderstorm complex resulted in four fatalities and 9 injuries.

Thunderstorm Wind in BLOUNT, TENNESSEE
From 05-JUL-12 17:30:00 to 05-JUL-12 17:30:00 (EST-5)
Location: CADES COVE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

One person was killed and three were injured when trees were blown down in the Cades Cove area.

Thunderstorm Wind in SULLIVAN, TENNESSEE
From 05-JUL-12 14:30:00 to 05-JUL-12 14:30:00 (EST-5)
Location: BRISTOL
Magnitude: 60.00 EG
Reported by: Trained Spotter

Two miles east of Bristol a portion of a roof was damaged and one tree was reported down.

Thunderstorm Wind in WASHINGTON, TENNESSEE
From 05-JUL-12 14:54:00 to 05-JUL-12 14:54:00 (EST-5)
Location: JOHNSON CITY
Magnitude: 60.00 EG
Reported by: Amateur Radio

Two large trees were reported down.  The first occurred on Holston Avenue and was six feet in diameter and the second was on Unaka Road and was four feet in diameter.

Thunderstorm Wind in WASHINGTON, TENNESSEE
From 05-JUL-12 15:00:00 to 05-JUL-12 15:00:00 (EST-5)
Location: JOHNSON CITY
Magnitude: 60.00 EG
Reported by: Emergency Manager

Numerous trees and power lines were reported down in Johnson City.

Thunderstorm Wind in SULLIVAN, TENNESSEE
From 05-JUL-12 15:15:00 to 05-JUL-12 15:15:00 (EST-5)
Location: SPRINGDALE
Magnitude: 60.00 EG
Reported by: Trained Spotter

Several trees were reported down in Kingsport.

Thunderstorm Wind in HAWKINS, TENNESSEE
From 05-JUL-12 15:30:00 to 05-JUL-12 15:30:00 (EST-5)
Location: SURGOINSVILLE
Magnitude: 60.00 EG
Reported by: Trained Spotter

One tree was reported down in Surgoinsville.

Thunderstorm Wind in GREENE, TENNESSEE
From 05-JUL-12 15:40:00 to 05-JUL-12 15:40:00 (EST-5)
Location: GREENEVILLE
Magnitude: 60.00 EG
Reported by: State Official

Several trees were reported down across the county.

Thunderstorm Wind in HAWKINS, TENNESSEE
From 05-JUL-12 15:40:00 to 05-JUL-12 15:40:00 (EST-5)
Location: ROGERSVILLE
Magnitude: 60.00 EG
Reported by: State Official

Numerous trees were reported down across the county.

Thunderstorm Wind in CAMPBELL, TENNESSEE
From 05-JUL-12 16:15:00 to 05-JUL-12 16:15:00 (EST-5)
Location: FORDTOWN
Magnitude: 60.00 EG
Reported by: State Official

Numerous trees were reported down from Jellico to La Follette.

Thunderstorm Wind in HAWKINS, TENNESSEE
From 05-JUL-12 16:20:00 to 05-JUL-12 16:20:00 (EST-5)
Location: BULLS GAP
Magnitude: 60.00 EG
Reported by: Newspaper

Numerous trees were reported down countywide including one that fell on a trailer in Bulls Gap.

Thunderstorm Wind in HAMBLEN, TENNESSEE
From 05-JUL-12 16:22:00 to 05-JUL-12 16:22:00 (EST-5)
Location: WITT
Magnitude: 60.00 EG
Reported by: State Official

A few trees were reported down in the Witt community.

Thunderstorm Wind in UNION, TENNESSEE
From 05-JUL-12 16:25:00 to 05-JUL-12 16:25:00 (EST-5)
Location: LUTTRELL
Magnitude: 60.00 EG
Reported by: Trained Spotter

Numerous trees and power lines were reported down in Luttrell.

Thunderstorm Wind in CLAIBORNE, TENNESSEE
From 05-JUL-12 16:29:00 to 05-JUL-12 16:29:00 (EST-5)
Location: TAZEWELL
Magnitude: 60.00 EG
Reported by: Amateur Radio

Several trees were reported down in Tazewell.

Thunderstorm Wind in JEFFERSON, TENNESSEE
From 05-JUL-12 16:30:00 to 05-JUL-12 16:30:00 (EST-5)
Location: FRENCH MILL
Magnitude: 60.00 EG
Reported by: Amateur Radio

Several trees were reported down near the intersection of East Dumplin Valley Road and highway 92.

Thunderstorm Wind in HAMBLEN, TENNESSEE
From 05-JUL-12 16:30:00 to 05-JUL-12 16:30:00 (EST-5)
Location: MORRISTOWN
Magnitude: 60.00 EG
Reported by: Newspaper

A few trees were reported down near Old Stage Road.

Thunderstorm Wind in SCOTT, TENNESSEE
From 05-JUL-12 16:40:00 to 05-JUL-12 16:40:00 (EST-5)
Location: HUNTSVILLE
Magnitude: 60.00 EG
Reported by: State Official

A few trees were reported down across the county.

Thunderstorm Wind in HAMILTON, TENNESSEE
From 05-JUL-12 16:55:00 to 05-JUL-12 16:55:00 (EST-5)
Location: APISON
Magnitude: 60.00 EG
Reported by: Emergency Manager

Several trees and power lines were reported down. One of the trees was reported down on a vehicle.

Thunderstorm Wind in SEVIER, TENNESSEE
From 05-JUL-12 16:55:00 to 05-JUL-12 16:55:00 (EST-5)
Location: CATLETTSBURG
Magnitude: 60.00 EG
Property damage: 1.00M
Crop damage: 0.00K
Reported by: State Official

A roof was blown off of a commercial structure.

Thunderstorm Wind in SEVIER, TENNESSEE
From 05-JUL-12 17:00:00 to 05-JUL-12 17:00:00 (EST-5)
Location: FRENCH BROAD
Magnitude: 60.00 EG
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Newspaper

Major damage was reported at the Mountain Cove Marina where two docks were damaged.

Thunderstorm Wind in KNOX, TENNESSEE
From 05-JUL-12 17:00:00 to 05-JUL-12 17:00:00 (EST-5)
Location: WEST KNOXVILLE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A few trees were reported down and the roof was damaged at a commercial structure on
John Sevier Highway.

Thunderstorm Wind in MORGAN, TENNESSEE
From 05-JUL-12 17:00:00 to 05-JUL-12 17:00:00 (EST-5)
Location: LAVENDER
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple trees were reported down.

Thunderstorm Wind in SEVIER, TENNESSEE
From 05-JUL-12 17:05:00 to 05-JUL-12 17:05:00 (EST-5)
Location: PIGEON FORGE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

A few trailers were damaged and several trees were reported down in a campground on Wears Valley Road.

Thunderstorm Wind in BLOUNT, TENNESSEE
From 05-JUL-12 17:15:00 to 05-JUL-12 17:15:00 (EST-5)
Location: FOREST HILL
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A few trees were reported down one mile south of Maryville.

Thunderstorm Wind in BLOUNT, TENNESSEE
From 05-JUL-12 17:20:00 to 05-JUL-12 17:20:00 (EST-5)
Location: MARYVILLE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

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

Thunderstorm Wind in LOUDON, TENNESSEE
From 05-JUL-12 17:40:00 to 05-JUL-12 17:40:00 (EST-5)
Location: HIGHLAND PARK
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Several trees and power lines were reported down across the county.

Thunderstorm Wind in ROANE, TENNESSEE
From 05-JUL-12 17:40:00 to 05-JUL-12 17:40:00 (EST-5)
Location: ROCKWOOD
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees were reported down in Rockwood.

Thunderstorm Wind in MORGAN, TENNESSEE
From 05-JUL-12 18:00:00 to 05-JUL-12 18:00:00 (EST-5)
Location: SUNBRIGHT
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Structural damage was reported at the Sunbright city garage. Also, numerous trees and power lines were reported down across the county.

Thunderstorm Wind in POLK, TENNESSEE
From 05-JUL-12 18:15:00 to 05-JUL-12 18:15:00 (EST-5)
Location: CHANCEYTOWN
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A few trees were reported down in Ducktown.

Thunderstorm Wind in MEIGS, TENNESSEE
From 05-JUL-12 18:15:00 to 05-JUL-12 18:15:00 (EST-5)
Location: DECATUR
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Numerous trees were reported down across the county.

Thunderstorm Wind in RHEA, TENNESSEE
From 05-JUL-12 18:20:00 to 05-JUL-12 18:20:00 (EST-5)
Location: SPRING CITY
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Numerous trees were reported down across the county.

Thunderstorm Wind in MCMINN, TENNESSEE
From 05-JUL-12 18:24:00 to 05-JUL-12 18:24:00 (EST-5)
Location: ATHENS
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees were reported down in Athens.

Thunderstorm Wind in MARION, TENNESSEE
From 05-JUL-12 12:45:00 to 05-JUL-12 12:45:00 (CST-6)
Location: DIXIE LEE
Magnitude: 50.00 EG
Reported by: State Official

Several trees were reported down in the vicinity of Battle Creek.

Thunderstorm Wind in HAMILTON, TENNESSEE
From 05-JUL-12 18:38:00 to 05-JUL-12 18:38:00 (EST-5)
Location: BARTLEBAUGH
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A houseboat capsized on Chickamauga Lake north of Chattanooga. A two year old female toddler and her grandmother were trapped under the boat when it capsized resulting in their deaths.

Thunderstorm Wind in BLOUNT, TENNESSEE
From 05-JUL-12 17:30:00 to 05-JUL-12 17:30:00 (EST-5)
Location: TREMONT
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

One person was killed and four were injured when trees were blown down at the Abrams Creek Campground.

Thunderstorm Wind in POLK, TENNESSEE
From 05-JUL-12 18:30:00 to 05-JUL-12 18:30:00 (EST-5)
Location: BENTON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A few trees were reported down on highway 33.

Thunderstorm Wind in HAMBLEN, TENNESSEE
From 05-JUL-12 16:20:00 to 05-JUL-12 16:20:00 (EST-5)
Location: MORRISTOWN
Magnitude: 60.00 EG
Reported by: Trained Spotter

A few trees were reported down on Henry Street in Morristown.

Thunderstorm Wind in KNOX, TENNESSEE
From 05-JUL-12 16:35:00 to 05-JUL-12 16:35:00 (EST-5)
Location: WEST KNOXVILLE
Magnitude: 60.00 EG
Reported by: Trained Spotter

One tree and numerous limbs were reported down on Ruggles Ferry Road.