Increasing moisture quickly moved up the Ohio River Valley on the morning of the 3rd into a developing east to west frontal zone.  The first of several thunderstorm complexes moved from west to east across northeast Kentucky around midday on the 3rd.  The west to east band of training thunderstorms shifted slightly north overnight.  As a result, a lull in the rain was seen over northeast Kentucky.  However, the convection sank back south during the daylight hours on the 4th. More thunderstorms crossed northeast Kentucky.
Rain totals over about a 30 hour period were heaviest toward the Ohio River, compared to points just to the south.  Warnock in Greenup County had 4.02 inches, while Ashland of Boyd County measured 4.29 inches. Meanwhile, Grayson measured 2.76 inches.
The ground was initially drier than counties further north in Ohio and West Virginia, but the final rounds of thunderstorms on the 4th did produce some flooding.

Thunderstorm Wind in BOYD, KENTUCKY
From 04-JUN-08 14:17:00 to 04-JUN-08 14:17:00 (EST-5)
Location: WESTWOOD
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: County Official

Outbuildings and trees were blown down.

Hail in CARTER, KENTUCKY
From 04-JUN-08 14:35:00 to 04-JUN-08 14:35:00 (EST-5)
Location: CARTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BOYD, KENTUCKY
From 04-JUN-08 14:48:00 to 04-JUN-08 14:48:00 (EST-5)
Location: RUSH
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in GREENUP, KENTUCKY
From 03-JUN-08 16:00:00 to 03-JUN-08 16:00:00 (EST-5)
Location: LOAD
Magnitude: 55.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A barn was damaged along Route 2070.

Flood in GREENUP, KENTUCKY
From 04-JUN-08 16:00:00 to 04-JUN-08 22:00:00 (EST-5)
Location: SOUTH SHORE
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several small streams overflowed and closed roads.  No evacuations were reported. Urban flooding in a shopping plaza along Diederich Boulevard in Russell affected several businesses.

Hail in GREENUP, KENTUCKY
From 04-JUN-08 17:54:00 to 04-JUN-08 17:54:00 (EST-5)
Location: GREENUP
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in GREENUP, KENTUCKY
From 04-JUN-08 18:03:00 to 04-JUN-08 18:03:00 (EST-5)
Location: WORTHINGTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Large branches were broken off.

Thunderstorm Wind in BOYD, KENTUCKY
From 04-JUN-08 18:21:00 to 04-JUN-08 18:21:00 (EST-5)
Location: ASHLAND
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down.

Hail in BOYD, KENTUCKY
From 04-JUN-08 14:59:00 to 04-JUN-08 14:59:00 (EST-5)
Location: ASHLAND
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in GREENUP, KENTUCKY
From 04-JUN-08 14:44:00 to 04-JUN-08 14:44:00 (EST-5)
Location: ARGILLITE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down with some damage to structures.

Hail in CARTER, KENTUCKY
From 04-JUN-08 15:03:00 to 04-JUN-08 15:03:00 (EST-5)
Location: GRAYSON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm Wind in BOYD, KENTUCKY
From 04-JUN-08 19:13:00 to 04-JUN-08 19:13:00 (EST-5)
Location: ASHLAND
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Large branches were broken off.