Repetitive showers and thunderstorms, moved southeast through southeast Ohio and into portions of northeast Kentucky between 1500E and 1830E on Tuesday, the 10th.  In northeast Kentucky, the heaviest rains fell in eastern Greenup County and Boyd County.  Later that night some minor water problems reached south, into Lawrence County.
This convection was just northeast of a warm front.  A sharp dew point gradient existed across the front.  Surface dew points were around 70 degrees just southwest of the boundary.  Luckily, later that same night, repetitive convection occurred in the Scioto River Valley of southern Ohio, missing this area just to the northwest.
Initially, the main impact was large hail.  As back building caused repetitive showers and thunderstorms, flooding became the primary issue.  Maximum rain amounts of 3 to 4 inches were observed.   The urban areas around Ashland likely had the heaviest rain. The highest total was 4 inches, measured at the Ashland cooperative observer site.

Flash Flood in BOYD, KENTUCKY
From 10-MAY-11 16:45:00 to 11-MAY-11 02:00:00 (EST-5)
Location: WESTWOOD
Flood cause: Heavy Rain
Property damage: 1.20M
Crop damage: 0.00K
Reported by: Emergency Manager

Serious urban flooding occurred in and around the city of Ashland.  Water was up to the windshields on several stalled vehicles.   Lexington Ave and Route 60 were a few of the flooded streets.  Basement flooding was common.  One house had its foundation weakened.  Some roads along rural streams were flooded, but damage was worst in the urban areas.

Hail in BOYD, KENTUCKY
From 10-MAY-11 16:34:00 to 10-MAY-11 16:34:00 (EST-5)
Location: ASHLAND
Magnitude: 1.25 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Hail in BOYD, KENTUCKY
From 10-MAY-11 16:32:00 to 10-MAY-11 16:32:00 (EST-5)
Location: ASHLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Funnel Cloud in BOYD, KENTUCKY
From 10-MAY-11 18:30:00 to 10-MAY-11 18:30:00 (EST-5)
Location: CANNONSBURG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in GREENUP, KENTUCKY
From 10-MAY-11 15:24:00 to 10-MAY-11 15:24:00 (EST-5)
Location: ARGILLITE
Magnitude: 1.75 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

Hail in GREENUP, KENTUCKY
From 10-MAY-11 15:22:00 to 10-MAY-11 15:22:00 (EST-5)
Location: ARGILLITE
Magnitude: 1.00 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

Hail in GREENUP, KENTUCKY
From 10-MAY-11 15:16:00 to 10-MAY-11 15:16:00 (EST-5)
Location: SOUTH PORTSMOUTH
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GREENUP, KENTUCKY
From 10-MAY-11 15:12:00 to 10-MAY-11 15:12:00 (EST-5)
Location: OLDTOWN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GREENUP, KENTUCKY
From 10-MAY-11 15:36:00 to 10-MAY-11 15:36:00 (EST-5)
Location: GREENUP
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GREENUP, KENTUCKY
From 10-MAY-11 15:35:00 to 10-MAY-11 15:35:00 (EST-5)
Location: GREENUP
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in GREENUP, KENTUCKY
From 10-MAY-11 23:34:00 to 10-MAY-11 23:34:00 (EST-5)
Location: OLDTOWN
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down along North Fork Road.

Flash Flood in GREENUP, KENTUCKY
From 10-MAY-11 16:45:00 to 10-MAY-11 23:45:00 (EST-5)
Location: GREENUP
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Serious urban street flooding occurred around such communities as Bellefonte, Russell, and Flatwoods.  Water surrounded homes and businesses.  A trailer was swept away in Flatwoods.  A few rural streams, such as Indian Run, flooded in the eastern portion of the county.  Damage to roads occurred.

Thunderstorm Wind in LAWRENCE, KENTUCKY
From 10-MAY-11 19:05:00 to 10-MAY-11 19:05:00 (EST-5)
Location: FALLSBURG
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees were blown down.

Thunderstorm Wind in LAWRENCE, KENTUCKY
From 10-MAY-11 19:10:00 to 10-MAY-11 19:10:00 (EST-5)
Location: LOUISA
Magnitude: 70.00 EG
Property damage: 200.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Several trees were blown down throughout the community.  Extensive power outages and scattered damage to structures occurred.  The damage also crossed the river to Fort Gay in West Virginia.

Flash Flood in LAWRENCE, KENTUCKY
From 11-MAY-11 01:00:00 to 11-MAY-11 03:00:00 (EST-5)
Location: WEBBVILLE
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The headwaters of Dry Fork flooded Routes 1 and 201.  Fishertown Branch Road was also closed due to high water.

Hail in BOYD, KENTUCKY
From 10-MAY-11 16:20:00 to 10-MAY-11 16:20:00 (EST-5)
Location: ASHLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BOYD, KENTUCKY
From 10-MAY-11 15:52:00 to 10-MAY-11 15:52:00 (EST-5)
Location: ASHLAND
Magnitude: 1.25 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in BOYD, KENTUCKY
From 10-MAY-11 15:49:00 to 10-MAY-11 15:49:00 (EST-5)
Location: ASHLAND
Magnitude: 1.00 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in BOYD, KENTUCKY
From 10-MAY-11 15:40:00 to 10-MAY-11 15:40:00 (EST-5)
Location: ASHLAND
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down.  One fell onto a house.