An outflow boundary from a complex of thunderstorms building across the Mid South interacted with moderate to strongly unstable air across Eastern Tennessee mainly north of interstate 40. The slow moving storms produced mainly wind damage with some hail as well as some flash flooding.

Thunderstorm Wind in HAMBLEN, TENNESSEE
From 21-MAY-13 18:15:00 to 21-MAY-13 18:15:00 (EST-5)
Location: MORRISTOWN
Magnitude: 50.00 EG
Reported by: State Official

Twelve trees were reported down in the county.

Thunderstorm Wind in JEFFERSON, TENNESSEE
From 21-MAY-13 18:30:00 to 21-MAY-13 18:30:00 (EST-5)
Location: JEFFERSON CITY
Magnitude: 50.00 EG
Reported by: NWS Employee

A few trees were reported down near East Dumplin Valley Road.

Thunderstorm Wind in GREENE, TENNESSEE
From 21-MAY-13 19:20:00 to 21-MAY-13 19:20:00 (EST-5)
Location: GREENEVILLE
Magnitude: 50.00 EG
Reported by: State Official

Several trees were reported down across the county.

Thunderstorm Wind in GREENE, TENNESSEE
From 21-MAY-13 19:24:00 to 21-MAY-13 19:24:00 (EST-5)
Location: GREENEVILLE
Magnitude: 50.00 EG
Reported by: State Official

Several trees were reported down across the county.

Hail in SULLIVAN, TENNESSEE
From 21-MAY-13 19:25:00 to 21-MAY-13 19:25:00 (EST-5)
Location: GALLOWAY MILL
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter size hail was reported in Bluff City.

Hail in SULLIVAN, TENNESSEE
From 21-MAY-13 19:40:00 to 21-MAY-13 19:40:00 (EST-5)
Location: GALLOWAY MILL
Magnitude: 1.00 
Reported by: State Official

Quarter size hail was reported in Bluff City.

Thunderstorm Wind in SULLIVAN, TENNESSEE
From 21-MAY-13 19:45:00 to 21-MAY-13 19:45:00 (EST-5)
Location: BLOUNTVILLE
Magnitude: 50.00 EG
Reported by: State Official

Several trees were reported down across the county.

Flash Flood in SEVIER, TENNESSEE
From 21-MAY-13 19:00:00 to 21-MAY-13 20:30:00 (EST-5)
Location: SEVIERVILLE ARPT
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Flash flooding around intersection of Earnest McMahon Rd and Pullen Road.

Flash Flood in SEVIER, TENNESSEE
From 21-MAY-13 19:30:00 to 21-MAY-13 21:00:00 (EST-5)
Location: KODAK
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Cars stranded on Black Oak Ridge Road near southwest end of Douglas Lake.

Thunderstorm Wind in WASHINGTON, TENNESSEE
From 21-MAY-13 19:45:00 to 21-MAY-13 19:45:00 (EST-5)
Location: JONESBORO
Magnitude: 50.00 EG
Reported by: State Official

Many trees were reported down across the county.

Flash Flood in UNICOI, TENNESSEE
From 21-MAY-13 20:30:00 to 21-MAY-13 22:30:00 (EST-5)
Location: ERWIN
Flood cause: Heavy Rain
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Widespread flash flooding over the northern portion of the county from Erwin northward. Numerous road closures. Water intrusion into a dozen homes and several businesses. Roads undercut. Two evacuations.

Thunderstorm Wind in SCOTT, TENNESSEE
From 21-MAY-13 15:30:00 to 21-MAY-13 15:30:00 (EST-5)
Location: ELVA
Magnitude: 50.00 EG
Reported by: State Official

A few trees were reported down in the Big South Fork National River and Recreation Area.

Thunderstorm Wind in SCOTT, TENNESSEE
From 21-MAY-13 15:35:00 to 21-MAY-13 15:35:00 (EST-5)
Location: ROBBINS
Magnitude: 50.00 EG
Reported by: State Official

A few trees were reported down in Robbins.

Thunderstorm Wind in BLOUNT, TENNESSEE
From 21-MAY-13 17:00:00 to 21-MAY-13 17:00:00 (EST-5)
Location: HAPPY VLY
Magnitude: 50.00 EG
Reported by: State Official

Trees and power lines were downed in Happy Valley.

Thunderstorm Wind in GREENE, TENNESSEE
From 21-MAY-13 17:00:00 to 21-MAY-13 17:00:00 (EST-5)
Location: GREENEVILLE
Magnitude: 50.00 EG
Reported by: State Official

Several trees were reported down across the county.

Thunderstorm Wind in JEFFERSON, TENNESSEE
From 21-MAY-13 17:30:00 to 21-MAY-13 17:30:00 (EST-5)
Location: DANDRIDGE
Magnitude: 50.00 EG
Reported by: State Official

Several trees were downed across the county with a concentration near Dandridge.

Thunderstorm Wind in SEVIER, TENNESSEE
From 21-MAY-13 17:30:00 to 21-MAY-13 17:30:00 (EST-5)
Location: CATLETTSBURG
Magnitude: 50.00 EG
Reported by: Department of Highways

A few trees were reported down across the county.

Thunderstorm Wind in BLOUNT, TENNESSEE
From 21-MAY-13 17:30:00 to 21-MAY-13 17:30:00 (EST-5)
Location: MARYVILLE
Magnitude: 50.00 EG
Reported by: State Official

Two trees were reported down in Maryville.

Flash Flood in CARTER, TENNESSEE
From 21-MAY-13 19:50:00 to 21-MAY-13 22:30:00 (EST-5)
Location: HAMPTON
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Roads washed out by flash flooding.

Flash Flood in CARTER, TENNESSEE
From 21-MAY-13 20:20:00 to 21-MAY-13 22:30:00 (EST-5)
Location: HAMPTON
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Ritter Town Road and Browns Branch Road impacted by water and debris. Some homes with water in basements. A few evacuations occurred. Car stranded in water.