Marginally supportive shear and plenty of CAPE combine to produce numerous severe thunderstorms that grew upscale into a mesoscale convective system. This MCS progressed from west to east across eastern Tennessee, bringing numerous reports of damaging winds and isolated flash flooding.

Hail in KNOX, TENNESSEE
From 12-AUG-23 14:02:00 to 12-AUG-23 14:02:00 (EST-5)
Location: HALLS XRDS
Magnitude: 1.00 
Reported by: Public

Thunderstorm Wind in MARION, TENNESSEE
From 12-AUG-23 11:52:00 to 12-AUG-23 11:52:00 (CST-6)
Location: SEQUATCHIE
Magnitude: 52.00 EG
Reported by: 911 Call Center

Multiple trees blown down by severe thunderstorm winds across the county.

Thunderstorm Wind in CAMPBELL, TENNESSEE
From 12-AUG-23 13:06:00 to 12-AUG-23 13:06:00 (EST-5)
Location: DE LAP
Magnitude: 52.00 EG
Reported by: 911 Call Center

Several trees blown down by powerful thunderstorm winds.

Thunderstorm Wind in HAMILTON, TENNESSEE
From 12-AUG-23 13:16:00 to 12-AUG-23 13:16:00 (EST-5)
Location: COULTERVILLE
Magnitude: 52.00 EG
Reported by: Public

A few trees blown down by severe thunderstorm wind gusts.

Thunderstorm Wind in SEQUATCHIE, TENNESSEE
From 12-AUG-23 12:16:00 to 12-AUG-23 12:16:00 (CST-6)
Location: LEWIS CHAPEL
Magnitude: 52.00 EG
Reported by: Public

A few trees blown down by severe thunderstorm wind gusts.

Thunderstorm Wind in SEQUATCHIE, TENNESSEE
From 12-AUG-23 12:16:00 to 12-AUG-23 12:16:00 (CST-6)
Location: LEWIS CHAPEL
Magnitude: 52.00 EG
Reported by: Public

A few trees blown down by severe thunderstorm wind gusts.

Thunderstorm Wind in MORGAN, TENNESSEE
From 12-AUG-23 13:33:00 to 12-AUG-23 13:33:00 (EST-5)
Location: DEER LODGE
Magnitude: 52.00 EG
Reported by: 911 Call Center

Several trees blown down by severe thunderstorm wind gusts.

Thunderstorm Wind in SCOTT, TENNESSEE
From 12-AUG-23 13:33:00 to 12-AUG-23 13:33:00 (EST-5)
Location: ROBBINS
Magnitude: 52.00 EG
Reported by: 911 Call Center

Several trees blown down by severe thunderstorm winds.

Thunderstorm Wind in RHEA, TENNESSEE
From 12-AUG-23 13:36:00 to 12-AUG-23 13:36:00 (EST-5)
Location: MONTAGUE
Magnitude: 52.00 EG
Reported by: 911 Call Center

Multiple trees and powerlines blown down by severe thunderstorm gusts.

Thunderstorm Wind in MORGAN, TENNESSEE
From 12-AUG-23 13:43:00 to 12-AUG-23 13:43:00 (EST-5)
Location: DEERMONT
Magnitude: 52.00 EG
Reported by: Public

Several trees blown down by powerful thunderstorm winds.

Thunderstorm Wind in KNOX, TENNESSEE
From 12-AUG-23 13:51:00 to 12-AUG-23 13:51:00 (EST-5)
Location: WHITES VLG
Magnitude: 52.00 EG
Reported by: 911 Call Center

Large tree blown down by thunderstorm winds near intersection.

Thunderstorm Wind in BLEDSOE, TENNESSEE
From 12-AUG-23 12:54:00 to 12-AUG-23 12:54:00 (CST-6)
Location: LEES STATION
Magnitude: 52.00 EG
Reported by: 911 Call Center

Several trees blown down by severe thunderstorm wind gusts.

Thunderstorm Wind in UNION, TENNESSEE
From 12-AUG-23 13:59:00 to 12-AUG-23 13:59:00 (EST-5)
Location: IRWIN
Magnitude: 52.00 EG
Reported by: Public

A few trees blown down by severe thunderstorm winds.

Thunderstorm Wind in KNOX, TENNESSEE
From 12-AUG-23 13:58:00 to 12-AUG-23 13:58:00 (EST-5)
Location: POWELL ARPT
Magnitude: 52.00 EG
Reported by: 911 Call Center

Large tree blown down by thunderstorm winds blocking lanes on road.

Thunderstorm Wind in MEIGS, TENNESSEE
From 12-AUG-23 14:14:00 to 12-AUG-23 14:14:00 (EST-5)
Location: GOODFIELD
Magnitude: 52.00 EG
Reported by: Public

Several trees blown down by thunderstorm winds.

Thunderstorm Wind in MONROE, TENNESSEE
From 12-AUG-23 14:32:00 to 12-AUG-23 14:32:00 (EST-5)
Location: SWEETWATER
Magnitude: 52.00 EG
Reported by: Public

Several trees blown down by severe thunderstorm wind gusts.

Thunderstorm Wind in MCMINN, TENNESSEE
From 12-AUG-23 14:34:00 to 12-AUG-23 14:34:00 (EST-5)
Location: FAIRVIEW
Magnitude: 52.00 EG
Reported by: Public

Multiple trees blown down by powerful wind gusts.

Thunderstorm Wind in GRAINGER, TENNESSEE
From 12-AUG-23 14:39:00 to 12-AUG-23 14:39:00 (EST-5)
Location: THORN HILL
Magnitude: 52.00 EG
Reported by: Public

A few trees blown down by powerful thunderstorm winds.

Thunderstorm Wind in MORGAN, TENNESSEE
From 12-AUG-23 14:30:00 to 12-AUG-23 14:30:00 (EST-5)
Location: LAVENDER
Magnitude: 52.00 EG
Reported by: Public

A few trees were blown down by severe thunderstorm winds.

Thunderstorm Wind in UNION, TENNESSEE
From 12-AUG-23 14:45:00 to 12-AUG-23 14:45:00 (EST-5)
Location: HICKORY STAR LNDG
Magnitude: 52.00 EG
Reported by: Public

Several trees were blown down by severe thunderstorm winds.

Thunderstorm Wind in KNOX, TENNESSEE
From 12-AUG-23 14:48:00 to 12-AUG-23 14:48:00 (EST-5)
Location: ARLINGTON
Magnitude: 52.00 EG
Reported by: 911 Call Center

A large tree was blown down by severe thunderstorm wind gusts and blocked traffic on roadway.

Thunderstorm Wind in KNOX, TENNESSEE
From 12-AUG-23 14:48:00 to 12-AUG-23 14:48:00 (EST-5)
Location: KIMBERLIN HGTS
Magnitude: 52.00 EG
Reported by: 911 Call Center

A large tree was blown down by severe thunderstorm wind gusts and blocked traffic. In addition, several other trees nearby were also felled by the winds.

Thunderstorm Wind in KNOX, TENNESSEE
From 12-AUG-23 14:51:00 to 12-AUG-23 14:51:00 (EST-5)
Location: MOORELAND HGTS
Magnitude: 52.00 EG
Reported by: 911 Call Center

Several trees were blown down along the roadways by severe thunderstorm wind gusts.

Thunderstorm Wind in SEVIER, TENNESSEE
From 12-AUG-23 15:02:00 to 12-AUG-23 15:02:00 (EST-5)
Location: MC MAHAN
Magnitude: 52.00 EG
Reported by: Public

Multiple trees were blown down by severe thunderstorm wind gusts.

Thunderstorm Wind in BLOUNT, TENNESSEE
From 12-AUG-23 14:55:00 to 12-AUG-23 14:55:00 (EST-5)
Location: SIXMILE
Magnitude: 52.00 MG
Reported by: Trained Spotter

Severe wind gust was recorded on a home weather station.

Thunderstorm Wind in KNOX, TENNESSEE
From 12-AUG-23 15:04:00 to 12-AUG-23 15:04:00 (EST-5)
Location: JOHN SEVIER STATION
Magnitude: 52.00 EG
Reported by: 911 Call Center

A large tree was blown down by severe thunderstorm winds and blocked Skyview Drive.

Thunderstorm Wind in CAMPBELL, TENNESSEE
From 12-AUG-23 14:20:00 to 12-AUG-23 14:20:00 (EST-5)
Location: JACKSBORO
Magnitude: 52.00 EG
Reported by: 911 Call Center

Multiple trees were blown down by severe thunderstorm wind gusts.

Thunderstorm Wind in ANDERSON, TENNESSEE
From 12-AUG-23 14:25:00 to 12-AUG-23 14:25:00 (EST-5)
Location: SCARBORO
Magnitude: 52.00 EG
Reported by: Public

Several trees were blown down across the local area by severe thunderstorm winds.

Thunderstorm Wind in KNOX, TENNESSEE
From 12-AUG-23 15:20:00 to 12-AUG-23 15:20:00 (EST-5)
Location: BURLINGTON
Magnitude: 52.00 EG
Reported by: 911 Call Center

A large tree was blown down by severe thunderstorm winds and blocked a lane of traffic on local road.

Thunderstorm Wind in SEVIER, TENNESSEE
From 12-AUG-23 15:20:00 to 12-AUG-23 15:20:00 (EST-5)
Location: SEVIERVILLE
Magnitude: 52.00 EG
Reported by: 911 Call Center

A few trees across the area were blown down by powerful thunderstorm winds.

Thunderstorm Wind in COCKE, TENNESSEE
From 12-AUG-23 15:42:00 to 12-AUG-23 15:42:00 (EST-5)
Location: BYBEE
Magnitude: 52.00 EG
Reported by: 911 Call Center

Several trees and powerlines were blown down by severe thunderstorm winds.

Thunderstorm Wind in SEVIER, TENNESSEE
From 12-AUG-23 15:45:00 to 12-AUG-23 15:45:00 (EST-5)
Location: PINE GROVE
Magnitude: 52.00 EG
Reported by: Public

A few trees were blown down by powerful thunderstorm gusts.

Thunderstorm Wind in SEVIER, TENNESSEE
From 12-AUG-23 15:47:00 to 12-AUG-23 15:47:00 (EST-5)
Location: PITNER
Magnitude: 52.00 EG
Reported by: Trained Spotter

Several large trees were felled by thunderstorm winds and blocked traffic on local road.

Thunderstorm Wind in UNICOI, TENNESSEE
From 12-AUG-23 16:26:00 to 12-AUG-23 16:26:00 (EST-5)
Location: COFFEE RIDGE
Magnitude: 52.00 EG
Reported by: Public

Several trees, and a sign, were blown over by severe thunderstorm winds.

Thunderstorm Wind in BLOUNT, TENNESSEE
From 12-AUG-23 15:15:00 to 12-AUG-23 15:15:00 (EST-5)
Location: KINZEL SPGS
Magnitude: 52.00 EG
Reported by: Public

Multiple trees were blown down by severe thunderstorm gusts.

Thunderstorm Wind in JEFFERSON, TENNESSEE
From 12-AUG-23 14:50:00 to 12-AUG-23 14:50:00 (EST-5)
Location: FLAT GAP
Magnitude: 52.00 EG
Reported by: NWS Employee

A large tree was blown down by severe winds alongside the intersection of two local roads.

Flash Flood in SCOTT, TENNESSEE
From 12-AUG-23 15:30:00 to 12-AUG-23 16:10:00 (EST-5)
Location: COAL HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Portions of Wolf Creek Road flooded.

Flash Flood in SEVIER, TENNESSEE
From 12-AUG-23 15:43:00 to 12-AUG-23 16:45:00 (EST-5)
Location: SEYMOUR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Photos of flooded roads.