A warm front lifted through during the morning of the 2nd with only a few showers.  Rounds of showers and thunderstorms formed in the lower Ohio River Valley and moved quickly east into northeast Kentucky during the evening hours.  These rounds continued into the morning of the 3rd, before a lull in the early and mid afternoon.  Rain totals of 1.25 to 1.5 inches were common by midday on the 3rd.
Additional rounds of showers and thunderstorms moved across during the evening hours. This was ahead of a low pressure wave along a strong cold front.  Dew points were in the upper 50s with temperatures in the low and mid 60s  The evening convection was elongated along the flow in Lawrence County with rain rates of a half inch to an inch in less than an hour.  The headwaters of the Little Fork, a tributary of the Little Sandy River also was hit by this rain.  This water flowed north and caused flooding in Carter County.
Rain totals in a 24 to 30 hour time span were on the order of 3 to 4 inches in  Lawrence County.  The mesonet gauge at Louisa went from a total of 1.4 inches of rain at midday on the 3rd, to a total near 4 inches by 2000E.  Their event rain total was 4.2 inches. The heaviest 5 minute rate was around 2 tenths of an inch during the evening.  Flooding along the smaller streams was common.  In its wake, flooding of the larger streams lingered into the 4th.
A major federal disaster was declared in Kentucky. It included Lawrence and Carter Counties in the initial declaration.  The disaster also encompassed the flooding during the 14th and 15th of the month.  See FEMA DR-4217 for more information.

Flood in LAWRENCE, KENTUCKY
From 03-APR-15 21:00:00 to 04-APR-15 10:00:00 (EST-5)
Location: MARTHA
Flood cause: Heavy Rain
Property damage: 75.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The larger creeks flooded in the wake of the heaviest rain.  Blaine Creek rose about 15 feet in the vertical and crested around 19 feet between midnight and dawn on the 4th.  Roads, including Route 32, were flooded.

Lightning in BOYD, KENTUCKY
From 02-APR-15 18:25:00 to 02-APR-15 18:25:00 (EST-5)
Location: SUMMIT
Property damage: 0.30K
Crop damage: 0.00K
Reported by: 911 Call Center

A barn on Harris Road sustained minor damage after being struck by lightning.  Damage was limited to the electrical panel and about 3 to 4 feet of the adjacent wall.

Flash Flood in LAWRENCE, KENTUCKY
From 03-APR-15 17:45:00 to 03-APR-15 21:00:00 (EST-5)
Location: WEBBVILLE
Flood cause: Heavy Rain
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous roads were blocked by flooding small streams throughout the county.  Several culverts were damaged or washed out, damaging and closing roads. Blaine and Webbville Fire Departments, plus Cherryville Fire and Rescue, responded to individuals in stalled flooded vehicles.  A few examples of flooding included Buck Branch, which was blocking 3 D Road and getting around a few houses.  Flooding occurred along Georges Creek around Charley.
Total 24 hour rain amounts reached 2.5 to 4 inches during this flooding.
The county damage assessment was 6 homes destroyed and 8 others with major damage.  Another dozen homes and 2 businesses had minor damage.  About 8 homes were classified as in a major risk due to hillside slides.  Around 43 small private bridges or culverts were destroyed.

Flood in CARTER, KENTUCKY
From 03-APR-15 21:00:00 to 04-APR-15 20:00:00 (EST-5)
Location: DENTON
Flood cause: Heavy Rain
Property damage: 1.20M
Crop damage: 0.00K
Reported by: River/Stream Gage

Small stream flooding occurred with the final rounds of showers during the evening of the 3rd mostly in the eastern portion of the county.  This was mainly along the Little  Fork watershed. An earth level had nearly 3 feet of dirt washed away from its center near Willard.
In the Hitchins to Willard vicinity, the county damage assessment was 20 homes destroyed with 18 other homes with major damage. Another 27 homes had minor damage.  A bank and 2 churches also sustained water damage.  The former elementary school in Hitchins, now a private school, also had water damage.  In the southwestern part of the county, West Brinegar Road had a culvert wash out from Macabee Creek.
The Little Sandy River crested nearly 3 feet higher, compared to the high water on the 11th of March.  The water level at Grayson reached 24.5 feet during the afternoon on the 4th.  Flood stage is 21 feet.  Roads and numerous fields were blocked by high water.  Some barns and outbuildings were also surrounded by water.