Multiple rounds of thunderstorms impacted the region on the last day of May. Damaging winds, large hail, and flooding were observed in this outbreak. The first round of storms moved through northwest Kentucky, mainly north of Madisonville, during the late morning and early afternoon hours. Locally damaging winds were associated with this line of storms. Scattered thunderstorm development then began by mid to late afternoon, with coverage increasing further into the evening hours. The first round of storms left an outflow boundary across southeast Missouri and the lower Ohio Valley, where scattered thunderstorms developed. Surface dewpoints near the boundary were in the lower 70s, which contributed to moderately strong instability. A subtle shortwave trough across the mid Mississippi Valley and lower Missouri Valley provided large-scale ascent for the late day and evening round of storms. Mid-level winds around 50 knots located just ahead of the shortwave helped to create moderate to strong deep-layer wind shear.

Flash Flood in CHRISTIAN, KENTUCKY
From 31-MAY-18 15:40:00 to 31-MAY-18 17:30:00 (CST-6)
Location: HOPKINSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

One foot of water was over Highway 41 near the junction of Old Kelly Road. A rural back road northwest of Hopkinsville was impassable due to flooding. A trained spotter reported 1.89 inches of rain fell in one hour.

Hail in DAVIESS, KENTUCKY
From 31-MAY-18 11:45:00 to 31-MAY-18 11:45:00 (CST-6)
Location: KNOTTSVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The hail was reported along the Hancock County line.

Hail in MARSHALL, KENTUCKY
From 31-MAY-18 12:15:00 to 31-MAY-18 12:15:00 (CST-6)
Location: BENTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BALLARD, KENTUCKY
From 31-MAY-18 14:42:00 to 31-MAY-18 14:42:00 (CST-6)
Location: KEVIL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in MCCRACKEN, KENTUCKY
From 31-MAY-18 14:52:00 to 31-MAY-18 14:52:00 (CST-6)
Location: WEST PADUCAH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in UNION, KENTUCKY
From 31-MAY-18 10:10:00 to 31-MAY-18 10:10:00 (CST-6)
Location: MORGANFIELD
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: State Official

A tree was reported over a road, and another large tree was blown down in the county.

Thunderstorm Wind in HENDERSON, KENTUCKY
From 31-MAY-18 10:35:00 to 31-MAY-18 10:35:00 (CST-6)
Location: HENDERSON
Magnitude: 56.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Emergency Manager

At least a half dozen trees were down, and power outages were reported.

Thunderstorm Wind in BALLARD, KENTUCKY
From 31-MAY-18 15:00:00 to 31-MAY-18 15:00:00 (CST-6)
Location: GAGE
Magnitude: 52.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous tree limbs were down.

Flash Flood in BALLARD, KENTUCKY
From 31-MAY-18 15:10:00 to 31-MAY-18 16:20:00 (CST-6)
Location: KEVIL
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Highway 60 was nearly impassable, with numerous vehicles in ditches. Rainfall of 1.74 inches in one hour fell across the county line at the NWS office in West Paducah.

Thunderstorm Wind in CHRISTIAN, KENTUCKY
From 31-MAY-18 15:32:00 to 31-MAY-18 15:45:00 (CST-6)
Location: HOPKINSVILLE
Magnitude: 56.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Emergency Manager

On Highway 91 about four miles northwest of Hopkinsville, a tree was down and corn was laying flat. Trees were blown down three miles north of Hopkinsville.

Thunderstorm Wind in CHRISTIAN, KENTUCKY
From 31-MAY-18 16:10:00 to 31-MAY-18 16:10:00 (CST-6)
Location: HOPKINSVILLE
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tree damage was reported from Hopkinsville northeastward. Near Honey Grove, trees were down across an intersection on Highway 507. Highway 107 was blocked by downed trees several miles north-northeast of the city of Hopkinsville. A tree fell across power lines in the city.

Thunderstorm Wind in BALLARD, KENTUCKY
From 31-MAY-18 21:28:00 to 31-MAY-18 21:28:00 (CST-6)
Location: OSCAR
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Public

The public reported damaging winds with power outages in the community. The type of damage was not specified.