A strong cold front approached the Tennessee Valley and southern Appalachians during the late afternoon and evening hours of Monday, June 21. A warm and humid air mass ahead of the front (following the remnants of Tropical Storm Claudette) led to the development of numerous clusters of strong to severe thunderstorms that tracked from west to east. The main impact from these storms was damaging winds, with two dozen reports of wind damage in the form of down trees and power lines. A barn was destroyed in Roane County, and a metal frame building was damaged in Speedwell in Claiborne County. In addition to the damaging winds, golf ball sized hail occurred in Hancock County.

Hail in HANCOCK, TENNESSEE
From 21-JUN-21 16:08:00 to 21-JUN-21 16:08:00 (EST-5)
Location: LUTHER
Magnitude: 1.50 
Reported by: Public

Thunderstorm Wind in MORGAN, TENNESSEE
From 21-JUN-21 15:45:00 to 21-JUN-21 15:45:00 (EST-5)
Location: SHADY GROVE
Magnitude: 52.00 EG
Reported by: 911 Call Center

A few trees were blown down.

Thunderstorm Wind in MORGAN, TENNESSEE
From 21-JUN-21 16:09:00 to 21-JUN-21 16:09:00 (EST-5)
Location: WARTBURG
Magnitude: 52.00 EG
Reported by: 911 Call Center

A few trees were blown down.

Thunderstorm Wind in ANDERSON, TENNESSEE
From 21-JUN-21 16:15:00 to 21-JUN-21 16:15:00 (EST-5)
Location: BUFFALO
Magnitude: 52.00 EG
Reported by: Law Enforcement

A few trees were blown down.

Thunderstorm Wind in HANCOCK, TENNESSEE
From 21-JUN-21 16:24:00 to 21-JUN-21 16:24:00 (EST-5)
Location: YOUNT TOWN
Magnitude: 52.00 EG
Reported by: Public

Two trees were blown down.

Thunderstorm Wind in CLAIBORNE, TENNESSEE
From 21-JUN-21 16:25:00 to 21-JUN-21 16:25:00 (EST-5)
Location: SPEEDWELL
Magnitude: 56.00 EG
Reported by: Emergency Manager

Numerous trees were blown down throughout the county, in addition to downed powerlines. A metal frame building was damaged, with a portion of the roof removed.

Thunderstorm Wind in SCOTT, TENNESSEE
From 21-JUN-21 16:28:00 to 21-JUN-21 16:28:00 (EST-5)
Location: ONEIDA SCOTT ARPT
Magnitude: 52.00 EG
Reported by: Law Enforcement

Several trees were blown down across the south end of the county.

Thunderstorm Wind in CLAIBORNE, TENNESSEE
From 21-JUN-21 16:29:00 to 21-JUN-21 16:29:00 (EST-5)
Location: DILLEY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A few trees were blown down.

Thunderstorm Wind in KNOX, TENNESSEE
From 21-JUN-21 16:50:00 to 21-JUN-21 16:50:00 (EST-5)
Location: COPPER RIDGE
Magnitude: 61.00 EG
Reported by: Public

Numerous trees were blown down across north Knox County. Radar estimated winds were near 70 mph.

Thunderstorm Wind in KNOX, TENNESSEE
From 21-JUN-21 16:51:00 to 21-JUN-21 16:51:00 (EST-5)
Location: CORINTH
Magnitude: 52.00 EG
Reported by: 911 Call Center

A few trees were blown down.

Thunderstorm Wind in UNION, TENNESSEE
From 21-JUN-21 17:07:00 to 21-JUN-21 17:07:00 (EST-5)
Location: RIDENOUR
Magnitude: 52.00 EG
Reported by: 911 Call Center

A few trees were blown down.

Thunderstorm Wind in GRAINGER, TENNESSEE
From 21-JUN-21 17:12:00 to 21-JUN-21 17:12:00 (EST-5)
Location: AVONDALE SPGS
Magnitude: 52.00 EG
Reported by: 911 Call Center

Several trees were blown down.

Thunderstorm Wind in CLAIBORNE, TENNESSEE
From 21-JUN-21 17:17:00 to 21-JUN-21 17:17:00 (EST-5)
Location: OAK GROVE
Magnitude: 52.00 EG
Reported by: 911 Call Center

Several trees were blown down across the county.

Thunderstorm Wind in CLAIBORNE, TENNESSEE
From 21-JUN-21 17:18:00 to 21-JUN-21 17:18:00 (EST-5)
Location: DILLEY
Magnitude: 52.00 EG
Reported by: Public

Several trees were blown down near the Clairfield area.

Thunderstorm Wind in MONROE, TENNESSEE
From 21-JUN-21 17:35:00 to 21-JUN-21 17:35:00 (EST-5)
Location: LAKESIDE
Magnitude: 52.00 EG
Reported by: 911 Call Center

Several trees down across northern Monroe County.

Thunderstorm Wind in BLOUNT, TENNESSEE
From 21-JUN-21 18:12:00 to 21-JUN-21 18:12:00 (EST-5)
Location: SINGLETON
Magnitude: 52.00 EG
Reported by: 911 Call Center

Several trees were blown down across the county.

Thunderstorm Wind in BLOUNT, TENNESSEE
From 21-JUN-21 18:13:00 to 21-JUN-21 18:13:00 (EST-5)
Location: LANIER
Magnitude: 52.00 EG
Reported by: 911 Call Center

Trees were blown down across the area.

Thunderstorm Wind in ROANE, TENNESSEE
From 21-JUN-21 18:35:00 to 21-JUN-21 18:35:00 (EST-5)
Location: ROCKWOOD
Magnitude: 52.00 EG
Reported by: 911 Call Center

Numerous trees and powerlines were blown down throughout the county. The Rockwood area was hit the hardest, and a barn was destroyed.