Clusters of storms, followed by a bowing line of thunderstorms, organized and accelerated east-northeastward during the overnight and wee morning hours. Several tornadoes accompanied mesovortices along the bowing line of storms. In addition, a particularly strong microburst was associated with the line. Finally, the occurrence of multiple thunderstorms resulted in localized flash flooding in the Pennyrile region. A mid-level shortwave trough moved east across the southern Plains. A belt of stronger southwesterly 500 mb winds spread northeast ahead of the trough into southeast Missouri and Arkansas. Instability was sufficient for a round of severe  thunderstorms to occur.

Tornado in HICKMAN, KENTUCKY
From 04-MAY-21 02:31:00 to 04-MAY-21 02:38:00 (CST-6)
Location: OAKTON
Tornado F-scale: EF1
Property damage: 350.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Multiple trees were snapped. Many tree branches and some trees fell on multiple homes, which inflicted damage. At one point there were 65 trees covering main and secondary roads across the county. All main roads were back open on the afternoon of the 4th, and crews then focused on secondary roads. Many roads were closed as cleanup continued. Emergency management reported 28 residential structures had some form of damage, and a dozen commercial structures were damaged as well. These included farming structures and equipment. One family was displaced from their mobile home because of damage from a fallen tree. A county state of emergency was declared. Peak winds were estimated near 105 mph.

Hail in FULTON, KENTUCKY
From 04-MAY-21 00:50:00 to 04-MAY-21 00:50:00 (CST-6)
Location: CRUTCHFIELD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in FULTON, KENTUCKY
From 04-MAY-21 02:33:00 to 04-MAY-21 02:41:00 (CST-6)
Location: JORDAN
Tornado F-scale: EF2
Property damage: 310.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

One home was destroyed, with the roof removed. Multiple outbuildings collapsed. Multiple large trees were snapped and uprooted. Peak winds were estimated near 125 mph.

Tornado in GRAVES, KENTUCKY
From 04-MAY-21 02:59:00 to 04-MAY-21 03:00:00 (CST-6)
Location: MAYFIELD GRAVES ARPT
Tornado F-scale: EF1
Property damage: 15.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The narrow, well-defined path was in a rural farmland and wooded area. A well-constructed modern home suffered minor to moderate roof damage. The tornado followed a creek bed for the last quarter mile, where a small patch of very large trees was snapped or uprooted. A well head was blown into a house, damaging the siding. Peak winds were estimated near 95 mph.

Thunderstorm Wind in GRAVES, KENTUCKY
From 04-MAY-21 03:01:00 to 04-MAY-21 03:02:00 (CST-6)
Location: TRI CITY
Magnitude: 65.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

There were numerous trees down and some outbuildings damaged in the southeast corner of Graves County.

Tornado in GRAVES, KENTUCKY
From 04-MAY-21 02:55:00 to 04-MAY-21 03:00:00 (CST-6)
Location: CUBA
Tornado F-scale: EF1
Property damage: 165.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Several farm buildings, including a large shop, lost parts or all of their roofs, with several smaller structures destroyed. At least a couple of homes had mainly minor damage to roofs or siding. Dozens of large trees were snapped or uprooted. The tornado travelled right along Highway 94 from southwest of Cuba to the Lynnville area. Peak winds were estimated near 95 mph.

Thunderstorm Wind in CALLOWAY, KENTUCKY
From 04-MAY-21 03:11:00 to 04-MAY-21 03:16:00 (CST-6)
Location: HAZEL
Magnitude: 83.00 EG
Property damage: 60.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A microburst over five miles long and about one mile wide caused extensive damage along the Tennessee border near Hazel. Peak winds were estimated near 95 mph. Numerous trees were blown down, including at least two trees that landed on houses. Several trees were down on U.S. Highway 641.

Thunderstorm Wind in CALLOWAY, KENTUCKY
From 04-MAY-21 03:08:00 to 04-MAY-21 03:16:00 (CST-6)
Location: TAYLORS STORE
Magnitude: 74.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

There were numerous downed or damaged trees across southern Calloway County, mainly from the southwest corner up to midway between Hazel and Murray. A few outbuildings were damaged or destroyed. This damage was separate from the Hazel microburst.

Thunderstorm Wind in MARSHALL, KENTUCKY
From 04-MAY-21 03:14:00 to 04-MAY-21 03:14:00 (CST-6)
Location: BREWERS
Magnitude: 56.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Public

Several trees were blown down. The roof was blown off a shop. There was roof damage to a home.

Flash Flood in MUHLENBERG, KENTUCKY
From 04-MAY-21 03:30:00 to 04-MAY-21 08:30:00 (CST-6)
Location: BANCROFT
Flood cause: Heavy Rain
Property damage: 75.00K
Crop damage: 0.00K
Reported by: State Official

Several roads were flooded, including a few main roads. Several water rescues were conducted. Water was close to four feet deep over Kentucky 181 near Highway 601, where at least one car stalled out. County schools were virtual instead of on-site. At the county high school, water entered the gym, and the parking lot was extensively flooded. In the Graham area, a couple of mobile homes were evacuated due to flooding. The porch was torn off one of the mobile homes. A rainfall measurement of 5.01 inches was received from a weather station six miles southwest of Greenville.

Thunderstorm Wind in TRIGG, KENTUCKY
From 04-MAY-21 03:40:00 to 04-MAY-21 03:47:00 (CST-6)
Location: CANTON
Magnitude: 61.00 EG
Property damage: 70.00K
Crop damage: 0.00K
Reported by: Public

A swath of sporadic wind damage extended along U.S. Highway 68 from the Lake Barkley bridge east to Highway 1062. A roof was severely damaged. At least several trees were down. A large open-sided machine shed collapsed. A granite monument in a cemetery was knocked over.

Tornado in CHRISTIAN, KENTUCKY
From 04-MAY-21 04:12:00 to 04-MAY-21 04:15:00 (CST-6)
Location: CASKY
Tornado F-scale: EF0
Property damage: 45.00K
Crop damage: 1.00K
Reported by: NWS Storm Survey

At least four barns lost portions of their tin roofs and/or walls. Several trees were uprooted or lost limbs. A narrow strip of wheat was blown down. The tornado began on the south side of Hopkinsville and ended several miles southeast of the center of Hopkinsville. Peak winds were estimated near 85 mph.

Hail in CHRISTIAN, KENTUCKY
From 04-MAY-21 01:55:00 to 04-MAY-21 01:55:00 (CST-6)
Location: CROFTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CHRISTIAN, KENTUCKY
From 04-MAY-21 02:07:00 to 04-MAY-21 02:07:00 (CST-6)
Location: CROFTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CALLOWAY, KENTUCKY
From 04-MAY-21 02:00:00 to 04-MAY-21 02:00:00 (CST-6)
Location: MURRAY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter