Severe convection developed ahead of a cold front during the late afternoon through the late evening hours in an atmosphere characterized by high shear with a 40 to 50 knot low level jet and a 120 knot upper level jet but only weak to moderate instability. The result was the tornado which produced EF-3 damage at Greenback and in the southern portion of the Great Smoky Mountain National Park in Eastern Tennessee.

Thunderstorm Wind in CAMPBELL, TENNESSEE
From 23-MAR-11 19:15:00 to 23-MAR-11 19:15:00 (EST-5)
Location: RED ASH
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Several trees were reported down in the county.

Thunderstorm Wind in GRAINGER, TENNESSEE
From 23-MAR-11 20:05:00 to 23-MAR-11 20:05:00 (EST-5)
Location: BLAINE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One tree was reported down at Blaine.

Thunderstorm Wind in GRAINGER, TENNESSEE
From 23-MAR-11 20:05:00 to 23-MAR-11 20:05:00 (EST-5)
Location: WASHBURN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One tree was reported down at Washburn.

Thunderstorm Wind in KNOX, TENNESSEE
From 23-MAR-11 20:10:00 to 23-MAR-11 20:10:00 (EST-5)
Location: WEST KNOXVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One tree was reported down at Spring Hill and another was downed at Buffet Mills.

Thunderstorm Wind in HAWKINS, TENNESSEE
From 23-MAR-11 20:20:00 to 23-MAR-11 20:20:00 (EST-5)
Location: SURGOINSVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One tree was down on Highway 346 in Surgoinsville.

Thunderstorm Wind in COCKE, TENNESSEE
From 23-MAR-11 20:34:00 to 23-MAR-11 20:34:00 (EST-5)
Location: DEL RIO
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One tree was reported down in Del Rio.

Thunderstorm Wind in SEVIER, TENNESSEE
From 23-MAR-11 20:35:00 to 23-MAR-11 20:35:00 (EST-5)
Location: GLADES
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One tree was reported down on the Spur on highway 441 between Gatlinburg and Pigeon Forge.

Thunderstorm Wind in SEVIER, TENNESSEE
From 23-MAR-11 20:35:00 to 23-MAR-11 20:35:00 (EST-5)
Location: CATLETTSBURG
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One tree was reported down on River Divide Road.

Hail in SULLIVAN, TENNESSEE
From 24-MAR-11 00:20:00 to 24-MAR-11 00:20:00 (EST-5)
Location: GALLOWAY MILL
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter size hail was reported.

Thunderstorm Wind in KNOX, TENNESSEE
From 23-MAR-11 15:45:00 to 23-MAR-11 15:45:00 (EST-5)
Location: WEST KNOXVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Two trees were reported down in the county.

Hail in CARTER, TENNESSEE
From 23-MAR-11 16:00:00 to 23-MAR-11 16:00:00 (EST-5)
Location: WINNER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Quarter size hail was reported on Highway 91.

Thunderstorm Wind in JOHNSON, TENNESSEE
From 23-MAR-11 17:45:00 to 23-MAR-11 17:45:00 (EST-5)
Location: DOEVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Several trees were reported down in the Butler area.

Tornado in BLOUNT, TENNESSEE
From 23-MAR-11 20:50:00 to 23-MAR-11 20:55:00 (EST-5)
Location: KISER
Tornado F-scale: EF3
Property damage: 2.50M
Reported by: Amateur Radio

An EF-3 tornado produced 140 mph winds along a 5.8 mile path with a maximum damage path width of 500 yards.  Twenty six homes sustained damage ranging from fifty percent to entirely demolished as a result of the tornado.

Thunderstorm Wind in HAWKINS, TENNESSEE
From 23-MAR-11 20:20:00 to 23-MAR-11 20:20:00 (EST-5)
Location: STRIGGERSVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One tree was reported down on Ebbing Flowing Springs Road.