The largest severe weather event of the 2018 summer affected the eastern parts of Middle Tennessee from the evening hours on July 20 into the morning hours on July 21. Several supercell thunderstorms first spread southeastward out of southern Kentucky during the evening on July 20, bringing numerous reports of large hail and damaging winds to the Upper Cumberland. Later in the evening and continuing into the early morning hours on July 21, additional strong to severe thunderstorms developed east of I-65, bringing numerous more reports of large hail and wind damage. Finally, an isolated elevated supercell thunderstorm developed in the early morning hours on July 21 and moved southeastward across De Kalb, White, and Van Buren Counties, dropping large hail up to golf ball size in several areas. In addition to the severe weather reports, these thunderstorms produced copious amounts of cloud to ground lightning, resulting in widespread power outages to many counties in the Upper Cumberland.

Lightning in CUMBERLAND, TENNESSEE
From 21-JUL-18 00:32:00 to 21-JUL-18 00:32:00 (CST-6)
Location: CROSSVILLE
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Lightning struck a transformer and caught it on fire on Main Street in Crossville.

Thunderstorm Wind in WILSON, TENNESSEE
From 21-JUL-18 00:35:00 to 21-JUL-18 00:35:00 (CST-6)
Location: TUCKERS XRDS
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down across the roadway at 4033 Bluebird Road.

Thunderstorm Wind in WILSON, TENNESSEE
From 21-JUL-18 00:38:00 to 21-JUL-18 00:38:00 (CST-6)
Location: LEBANON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down into the roadway at 1200 Africa Road.

Thunderstorm Wind in WILSON, TENNESSEE
From 21-JUL-18 00:39:00 to 21-JUL-18 00:39:00 (CST-6)
Location: LEBANON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Power lines were blown down on Tennessee Blvd at Baddour Parkway.

Thunderstorm Wind in WHITE, TENNESSEE
From 21-JUL-18 00:42:00 to 21-JUL-18 00:42:00 (CST-6)
Location: SPARTA
Magnitude: 45.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Social Media

A Facebook photo showed a tree was uprooted at the White County Public Library in Sparta.

Thunderstorm Wind in WILSON, TENNESSEE
From 21-JUL-18 00:45:00 to 21-JUL-18 00:45:00 (CST-6)
Location: SHOP SPGS
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A large tree was blown across the roadway on Sparta Pike at Young Road.

Thunderstorm Wind in WILSON, TENNESSEE
From 21-JUL-18 00:35:00 to 21-JUL-18 00:35:00 (CST-6)
Location: TUCKERS XRDS
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down that blocked the right lane of I-40 westbound.

Thunderstorm Wind in WILSON, TENNESSEE
From 21-JUL-18 00:38:00 to 21-JUL-18 00:38:00 (CST-6)
Location: LEBANON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree fell onto a jeep in Lebanon.

Hail in CLAY, TENNESSEE
From 20-JUL-18 18:30:00 to 20-JUL-18 18:30:00 (CST-6)
Location: PEA RIDGE STORE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter size hail reported in Pea Ridge.

Hail in PICKETT, TENNESSEE
From 20-JUL-18 18:32:00 to 20-JUL-18 18:32:00 (CST-6)
Location: BYRDSTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Facebook photos showed dime to quarter size hail in Byrdstown.

Thunderstorm Wind in OVERTON, TENNESSEE
From 20-JUL-18 18:44:00 to 20-JUL-18 18:44:00 (CST-6)
Location: HILHAM
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down at 170 Standing Stone Park Highway in Hilham.

Thunderstorm Wind in WARREN, TENNESSEE
From 21-JUL-18 01:15:00 to 21-JUL-18 01:15:00 (CST-6)
Location: MC MINNVILLE
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

The Southern Standard newspaper reported numerous trees were blown down all across Warren County with some trees falling on houses.

Thunderstorm Wind in COFFEE, TENNESSEE
From 21-JUL-18 01:55:00 to 21-JUL-18 01:55:00 (CST-6)
Location: HILLSBORO
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down across eastern Coffee County.

Thunderstorm Wind in GRUNDY, TENNESSEE
From 21-JUL-18 02:25:00 to 21-JUL-18 02:25:00 (CST-6)
Location: MONTEAGLE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down in Monteagle.

Hail in DEKALB, TENNESSEE
From 21-JUL-18 04:10:00 to 21-JUL-18 04:10:00 (CST-6)
Location: SMITHVILLE MUNI ARPT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A Facebook photo showed hail up to half dollar size covered a patio in Smithville.

Thunderstorm Wind in JACKSON, TENNESSEE
From 20-JUL-18 18:49:00 to 20-JUL-18 18:49:00 (CST-6)
Location: FLYNNS LICK
Magnitude: 45.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down in the Flynns Lick area.

Hail in DEKALB, TENNESSEE
From 21-JUL-18 04:15:00 to 21-JUL-18 04:15:00 (CST-6)
Location: INDIAN MOUND
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A Twitter report indicated golf ball size hail fell in eastern De Kalb County.

Hail in WHITE, TENNESSEE
From 21-JUL-18 04:16:00 to 21-JUL-18 04:16:00 (CST-6)
Location: CENTER PT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A Twitter report indicated pea to golf ball size hail fell on the De Kalb/White County line.

Hail in JACKSON, TENNESSEE
From 20-JUL-18 18:49:00 to 20-JUL-18 18:49:00 (CST-6)
Location: FLYNNS LICK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Dime size hail was reported in the Flynns Lick area.

Hail in PICKETT, TENNESSEE
From 20-JUL-18 18:50:00 to 20-JUL-18 18:50:00 (CST-6)
Location: CEDAR HILL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Facebook photos showed quarter size hail in the Cedar Grove area.

Hail in CLAY, TENNESSEE
From 20-JUL-18 19:07:00 to 20-JUL-18 19:07:00 (CST-6)
Location: CELINA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter size hail was reported in Celina.

Hail in JACKSON, TENNESSEE
From 20-JUL-18 19:13:00 to 20-JUL-18 19:13:00 (CST-6)
Location: UNION HILL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Dime to nickel size hail was reported on Gainesboro Grade near the Jackson/Putnam County line.

Hail in VAN BUREN, TENNESSEE
From 21-JUL-18 04:43:00 to 21-JUL-18 04:43:00 (CST-6)
Location: PHIFERES
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Quarter size hail was reported at the Fall Creek Falls campground.

Hail in VAN BUREN, TENNESSEE
From 21-JUL-18 04:42:00 to 21-JUL-18 04:42:00 (CST-6)
Location: PHIFERES
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A Facebook report indicated dime size hail fell in Fall Creek Falls State Park.

Thunderstorm Wind in CLAY, TENNESSEE
From 20-JUL-18 19:08:00 to 20-JUL-18 19:08:00 (CST-6)
Location: MIDWAY
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down on Moss Arcot Road.

Thunderstorm Wind in FENTRESS, TENNESSEE
From 20-JUL-18 19:16:00 to 20-JUL-18 19:16:00 (CST-6)
Location: JAMESTOWN
Magnitude: 45.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Minor roof damage occurred to a house in Jamestown just off Highway 52 East.

Thunderstorm Wind in FENTRESS, TENNESSEE
From 20-JUL-18 18:58:00 to 20-JUL-18 18:58:00 (CST-6)
Location: RIVERTON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down on Old Stevens Road.

Hail in PUTNAM, TENNESSEE
From 20-JUL-18 19:20:00 to 20-JUL-18 19:20:00 (CST-6)
Location: BLOOMINGTON SPGS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter size hail was reported near Cumby Road at Gainesboro Grade.

Hail in PUTNAM, TENNESSEE
From 20-JUL-18 19:23:00 to 20-JUL-18 19:23:00 (CST-6)
Location: COOKEVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PUTNAM, TENNESSEE
From 20-JUL-18 19:24:00 to 20-JUL-18 19:24:00 (CST-6)
Location: ALGOOD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Facebook reports indicated golfball size hail fell near Algood Elementary School.

Hail in PUTNAM, TENNESSEE
From 20-JUL-18 19:25:00 to 20-JUL-18 19:25:00 (CST-6)
Location: ALGOOD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in OVERTON, TENNESSEE
From 20-JUL-18 19:25:00 to 20-JUL-18 19:25:00 (CST-6)
Location: LIVINGSTON ARPT
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees were blown down in Livingston including on Preston Street, West Main Street, Monterey Highway, 1972 Villa Drive, and 900 North Church Street. Power lines were also blown down at 605 High Street.

Hail in PUTNAM, TENNESSEE
From 20-JUL-18 19:29:00 to 20-JUL-18 19:29:00 (CST-6)
Location: COOKEVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in OVERTON, TENNESSEE
From 20-JUL-18 19:30:00 to 20-JUL-18 19:30:00 (CST-6)
Location: BEELER HILL
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down on Rushing Springs Road.

Hail in PUTNAM, TENNESSEE
From 20-JUL-18 19:31:00 to 20-JUL-18 19:31:00 (CST-6)
Location: COOKEVILLE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A Twitter tSpotter report indicated quarter to half dollar size hail fell in Cookeville.

Thunderstorm Wind in JACKSON, TENNESSEE
From 20-JUL-18 19:33:00 to 20-JUL-18 19:33:00 (CST-6)
Location: CENTER GROVE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees and power lines were blown down on Cummins Mill Road.

Hail in OVERTON, TENNESSEE
From 20-JUL-18 19:34:00 to 20-JUL-18 19:34:00 (CST-6)
Location: LIVINGSTON ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in PUTNAM, TENNESSEE
From 20-JUL-18 19:35:00 to 20-JUL-18 19:35:00 (CST-6)
Location: COOKEVILLE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in PUTNAM, TENNESSEE
From 20-JUL-18 19:35:00 to 20-JUL-18 19:35:00 (CST-6)
Location: JEREMIAH
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down near Zeb Warren Road at Ben Mason Road.

Thunderstorm Wind in PUTNAM, TENNESSEE
From 20-JUL-18 20:15:00 to 20-JUL-18 20:15:00 (CST-6)
Location: DOUBLE SPGS
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down on Wakefield Drive near County Farm Road.

Thunderstorm Wind in PUTNAM, TENNESSEE
From 20-JUL-18 20:17:00 to 20-JUL-18 20:17:00 (CST-6)
Location: DOUBLE SPGS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were snapped and uprooted around the Post Oak Shade Church at Thomas Road and Pippin Road.

Thunderstorm Wind in PUTNAM, TENNESSEE
From 20-JUL-18 20:20:00 to 20-JUL-18 20:20:00 (CST-6)
Location: HOLLADAY
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

Numerous trees were blown down that blocked the Cane Creek Park mountain bike trail causing it to be closed for 2 to 3 weeks.

Hail in PUTNAM, TENNESSEE
From 20-JUL-18 20:22:00 to 20-JUL-18 20:22:00 (CST-6)
Location: COOKEVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in CUMBERLAND, TENNESSEE
From 20-JUL-18 20:27:00 to 20-JUL-18 20:27:00 (CST-6)
Location: PLEASANT HILL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Dime size hail was reported in Pleasant Hill.

Thunderstorm Wind in CUMBERLAND, TENNESSEE
From 20-JUL-18 20:51:00 to 20-JUL-18 20:51:00 (CST-6)
Location: NEW ERA
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees, power lines, and a transformer were blown down on Vandever Road.

Thunderstorm Wind in JACKSON, TENNESSEE
From 20-JUL-18 22:57:00 to 20-JUL-18 22:57:00 (CST-6)
Location: MC COINSVILLE
Magnitude: 45.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A large tree was blown down that blocked Highway 56 South.

Thunderstorm Wind in PUTNAM, TENNESSEE
From 20-JUL-18 23:15:00 to 20-JUL-18 23:15:00 (CST-6)
Location: BLOOMINGTON SPGS
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A power pole was blown down at Cumby Road and Pippin Road.

Thunderstorm Wind in PUTNAM, TENNESSEE
From 20-JUL-18 23:40:00 to 20-JUL-18 23:40:00 (CST-6)
Location: DOUBLE SPGS
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and power lines were blown down along Pippin Road.

Thunderstorm Wind in MACON, TENNESSEE
From 20-JUL-18 23:40:00 to 20-JUL-18 23:40:00 (CST-6)
Location: LAFAYETTE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Numerous trees and some power lines were blown down across Macon County mainly from Lafayette eastward.

Thunderstorm Wind in PUTNAM, TENNESSEE
From 20-JUL-18 23:48:00 to 20-JUL-18 23:48:00 (CST-6)
Location: MONTEREY
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees were blown down all across Putnam County.

Thunderstorm Wind in PUTNAM, TENNESSEE
From 20-JUL-18 23:59:00 to 20-JUL-18 23:59:00 (CST-6)
Location: COOKEVILLE
Magnitude: 45.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several trees were blown down in Cookeville.

Hail in SMITH, TENNESSEE
From 21-JUL-18 00:25:00 to 21-JUL-18 00:25:00 (CST-6)
Location: CARTHAGE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CUMBERLAND, TENNESSEE
From 21-JUL-18 00:30:00 to 21-JUL-18 00:30:00 (CST-6)
Location: OZONE
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Social Media

Several trees were blown down in Ozone and Westel.

Thunderstorm Wind in CUMBERLAND, TENNESSEE
From 21-JUL-18 00:30:00 to 21-JUL-18 00:30:00 (CST-6)
Location: CROSSVILLE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Department of Highways

Cumberland County Highway Department reported numerous trees were blown down blocking roadways all across Cumberland County.