A strong cold front moved through the region, preceded by numerous thunderstorms during the evening hours on December 5th and into the early morning on the 6th. Large hail, a few tornadoes, and an isolated damaging wind event accompanied the strongest storms. There were four tornadoes that touched down in the Tennessee border counties of western Kentucky. A loose clustering of storms and embedded supercells caused most of the severe weather in the evening. Overnight, the severe weather was mostly in the form of a convective line with embedded mesoscale circulations. The severe storm environment was characterized by weak instability but very strong wind shear.

Tornado in CALLOWAY, KENTUCKY
From 06-DEC-21 03:36:00 to 06-DEC-21 03:43:00 (CST-6)
Location: LYNN GROVE
Tornado F-scale: EF1
Property damage: 225.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado continued into Calloway County from Graves County. Trees were snapped or uprooted. Near the end of the damage track, a tree landed on a house. Many large tree branches were down. Three large pole barns were destroyed, and structural damage occurred to nearby houses, including roof damage. Vehicles were damaged. The tornado track ended only a few miles southwest of Murray. Peak winds in the Calloway County portion of the tornado were estimated near 100 mph.

Thunderstorm Wind in CALLOWAY, KENTUCKY
From 06-DEC-21 03:50:00 to 06-DEC-21 03:50:00 (CST-6)
Location: MURRAY
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Significant tree and power line damage was reported along and near Highway 280.

Tornado in TODD, KENTUCKY
From 06-DEC-21 04:33:00 to 06-DEC-21 04:42:00 (CST-6)
Location: TRESS SHOP
Tornado F-scale: EF1
Property damage: 150.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado tracked from west to east, passing just north of Elkton by only about one mile. Several older barns were damaged or destroyed. Many large trees were uprooted or snapped. Two semi trailers were flipped over. One of the trailers, which was at the intersection of Highways 181 and 106, was storing construction equipment. There was minor roof damage. Peak winds were estimated near 90 mph.

Tornado in LIVINGSTON, KENTUCKY
From 05-DEC-21 20:24:00 to 05-DEC-21 20:25:00 (CST-6)
Location: LEDBETTER
Tornado F-scale: EF0
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A towboat captain on the Ohio River near the confluence of the Tennessee River reported a tornado narrowly missed the boat as it crossed the river.  The tornado ripped the flag off the flagpole on the bow of the vessel. No other damage was reported. Peak winds were estimated near 65 mph.

Tornado in GRAVES, KENTUCKY
From 06-DEC-21 03:34:00 to 06-DEC-21 03:36:00 (CST-6)
Location: TRI CITY
Tornado F-scale: EF0
Property damage: 4.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Along the Graves County portion of the path, many large tree branches were down. The short portion of the path in Graves County was rated EF-0. The tornado then proceeded into Calloway County.

Tornado in TODD, KENTUCKY
From 06-DEC-21 04:40:00 to 06-DEC-21 04:45:00 (CST-6)
Location: NORTH ZION
Tornado F-scale: EF0
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several sheds experienced roof damage and/or wall collapse. The tornado tracked along a nearly five-mile path between Trenton and Allensville, ending at Highway 102. Peak winds were estimated near 85 mph.

Tornado in GRAVES, KENTUCKY
From 06-DEC-21 03:23:00 to 06-DEC-21 03:29:00 (CST-6)
Location: WINGO
Tornado F-scale: EF0
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This weak tornado tracked across rural farm country between Wingo and Cuba. Mainly trees and large tree branches were down. There was damage to a few barns and a chicken house. Peak winds were estimated near 85 mph.

Hail in BALLARD, KENTUCKY
From 05-DEC-21 19:16:00 to 05-DEC-21 19:16:00 (CST-6)
Location: GAGE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HOPKINS, KENTUCKY
From 05-DEC-21 20:30:00 to 05-DEC-21 20:30:00 (CST-6)
Location: MADISONVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCCRACKEN, KENTUCKY
From 05-DEC-21 19:35:00 to 05-DEC-21 19:35:00 (CST-6)
Location: PADUCAH
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in MCCRACKEN, KENTUCKY
From 05-DEC-21 19:29:00 to 05-DEC-21 19:35:00 (CST-6)
Location: LONE OAK
Magnitude: 1.50 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail was reported a few miles northwest through southwest of Lone Oak. Most of the hail was dime sized, but the largest stone was 1.5 inches. Some hail damage was reported to vehicles near Lone Oak.

Hail in CALLOWAY, KENTUCKY
From 06-DEC-21 03:50:00 to 06-DEC-21 03:50:00 (CST-6)
Location: ALMO
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer