A slow moving frontal boundary pushed into a moist and unstable air mass during the  afternoon hours on the 2nd.  This produced numerous showers and thunderstorms resulting in 2 to 5 inch rainfall accumulations through 2 or 3 in the morning on the 3rd across northern Alabama.
Northwestern Alabama was hit the hardest, enduring a second round of flash flooding since the afternoon of May 1st.  As a result of this rainfall and runoff from heavy rainfall further north, local streams and creeks added to flooding concerns through May the 3rd.  In fact Shoal Creek in Lauderdale county reached a record flood stage of 23.12 feet around 2 am on May 3rd as a result of the heavy rainfall and additional runoff upstream.  Numerous other rivers and streams rose above flood stage including:  Big Will's Creek in northeast AL, Indian Creek in Madison County, and the Tennessee River at Florence.

Flash Flood in LIMESTONE, ALABAMA
From 02-MAY-10 21:30:00 to 03-MAY-10 23:30:00 (CST-6)
Location: GREENBRIER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

One foot of water covered Madison Blvd west of County Line Road.

Flash Flood in MADISON, ALABAMA
From 02-MAY-10 15:00:00 to 02-MAY-10 15:01:00 (CST-6)
Location: SULPHUR SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The 400 block of Narrow Lane was flooded.

Flash Flood in MADISON, ALABAMA
From 02-MAY-10 15:00:00 to 02-MAY-10 15:01:00 (CST-6)
Location: NORMAL
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A home on Swanson Drive was reported flooded.

Flash Flood in MADISON, ALABAMA
From 02-MAY-10 21:35:00 to 02-MAY-10 23:35:00 (CST-6)
Location: OAKWOOD COLLEGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Portions of Country Club Ave. and North Memorial Parkway were reported impassable due to flooding.

Flash Flood in CULLMAN, ALABAMA
From 03-MAY-10 00:00:00 to 03-MAY-10 02:00:00 (CST-6)
Location: WHITE CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of county roads 617 and 637 were washed away due to flash flooding.

Flash Flood in CULLMAN, ALABAMA
From 03-MAY-10 00:00:00 to 03-MAY-10 02:00:00 (CST-6)
Location: MT VIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of CR 1425 were washed away by flash flooding.

Flash Flood in CULLMAN, ALABAMA
From 03-MAY-10 00:00:00 to 03-MAY-10 02:00:00 (CST-6)
Location: PHELAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of CR 722 were washed away by flash flooding.

Flash Flood in JACKSON, ALABAMA
From 03-MAY-10 01:00:00 to 03-MAY-10 03:00:00 (CST-6)
Location: STEVENSON ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Approximately a 50 foot section of Old Mount Carmel road in the Stevenson community was closed due to flooding.

Thunderstorm Wind in CULLMAN, ALABAMA
From 02-MAY-10 09:53:00 to 02-MAY-10 09:58:00 (CST-6)
Location: GARDEN CITY
Magnitude: 43.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down across the road at the intersection of highway 91 and CR 509.

Flash Flood in MORGAN, ALABAMA
From 02-MAY-10 21:34:00 to 02-MAY-10 23:34:00 (CST-6)
Location: OAKWORTH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

The intersection of Country Club road and Apache Lane were reported impassable.

Flash Flood in CULLMAN, ALABAMA
From 03-MAY-10 00:00:00 to 03-MAY-10 02:00:00 (CST-6)
Location: GOLD RIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of CR 1492 were washed away by flash flooding.

Flash Flood in CULLMAN, ALABAMA
From 03-MAY-10 00:00:00 to 03-MAY-10 02:00:00 (CST-6)
Location: BROOKLYN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of CR 1716 were washed away by flash flooding.

Flash Flood in CULLMAN, ALABAMA
From 03-MAY-10 00:00:00 to 03-MAY-10 02:00:00 (CST-6)
Location: BROOKLYN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of CR 1716 were washed away by flash flooding.

Thunderstorm Wind in JACKSON, ALABAMA
From 02-MAY-10 21:55:00 to 02-MAY-10 22:05:00 (CST-6)
Location: HODGE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A large oak tree was uprooted on Clemons road in Scottsboro.  The tree was approximately 3 to 4 feet in diameter a it's trunks.

Flash Flood in MADISON, ALABAMA
From 02-MAY-10 21:57:00 to 02-MAY-10 23:27:00 (CST-6)
Location: SULPHUR SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The intersection of Walker Lane and Shed road were reported impassable due to flooding.

Flash Flood in MORGAN, ALABAMA
From 02-MAY-10 21:34:00 to 02-MAY-10 22:04:00 (CST-6)
Location: HARTSELLE ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Nance Ford road was reported imapassable due to flooding.

Flash Flood in MADISON, ALABAMA
From 02-MAY-10 21:35:00 to 02-MAY-10 23:05:00 (CST-6)
Location: OAKWOOD COLLEGE
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Flash flooding was reported on portions of Arcadia Circle and Cook Ave. On Cook Avenue, the water was reported to be 3 feet deep.  A car was stranded there and the driver required a water rescue to reach safety.

Flash Flood in MORGAN, ALABAMA
From 02-MAY-10 21:04:00 to 02-MAY-10 22:35:00 (CST-6)
Location: AUSTINVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A house was reported flooded on Danville road.  Exact location was estimated.

Flash Flood in MADISON, ALABAMA
From 02-MAY-10 21:35:00 to 02-MAY-10 23:05:00 (CST-6)
Location: OAKWOOD COLLEGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of Euclid road and Mallory Ave were reported flooded.

Flash Flood in LIMESTONE, ALABAMA
From 02-MAY-10 21:57:00 to 02-MAY-10 23:27:00 (CST-6)
Location: GREENBRIER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

One foot of water was reported covering Madison Blvd. west of County Line road.

Flash Flood in LAUDERDALE, ALABAMA
From 02-MAY-10 13:08:00 to 02-MAY-10 17:08:00 (CST-6)
Location: WATERLOO
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of County Road 14 were reported impassable due to flooding, particularly near Threets park.

Flash Flood in LAUDERDALE, ALABAMA
From 02-MAY-10 13:08:00 to 02-MAY-10 17:08:00 (CST-6)
Location: WATERLOO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of CR 90 in Waterloo were reported impassable due to flooding.

Flash Flood in LIMESTONE, ALABAMA
From 02-MAY-10 21:03:00 to 02-MAY-10 22:33:00 (CST-6)
Location: O NEAL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Glaze road between Quinn and Newcutt roads in Athens was reported flooded.

Flash Flood in MORGAN, ALABAMA
From 02-MAY-10 21:28:00 to 02-MAY-10 22:58:00 (CST-6)
Location: OAK RIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Main street west of Hartselle was reported impassable due to flooding.  Also, reports were received that US 31 north of hwy 36 was becoming impassable.

Flood in LAUDERDALE, ALABAMA
From 02-MAY-10 19:00:00 to 04-MAY-10 11:00:00 (CST-6)
Location: PRITTON
Flood cause: Heavy Rain
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Between 2 and 4 inches of rainfall combined with 8 inches of rainfall the previous day upstream in Lawrenceburg (Tennessee), caused Shoal Creek to rise above it's banks on Sunday evening, May 2.  This resulted in flooded homes near the river as the night progressed. This flooding continued and became worse through the early morning hours on Monday.  The creek crested at a record 23.12 feet, before gradually receding.
Locations at and near the Bluff View Shores and Hidden Valley community were particularly hard hit from flood waters from Shoal Creek. The force of the flowing water broke several docks with numerous boats still attached to their slips free from there cables at the Emerald Beach Marina in Killen. They were taken downstream in the powerful currents to the old twin bridges on Highway 72, just north of the entrance to the Tennessee River. The docks making up the marina (total of 16 - 5K each) were unusable after cleanup and one boat along with it's contents valued at about 42,000 dollars was destroyed.  Emergency response costs to remove the docks, boats, and other debris from the bridge was estimated at 31,000 dollars.  In Addition, costs of contractors to assist emergency response crews totaled 434,500 dollars.
In addition, the powerful flood current broke a work barge from it's moorings and sent it downstream.  It struck Happy Hollow bridge on CR 47 sometime after midnight on Monday.  The barge scraped the bottom of the bridge as it passed underneath and later came to rest further downstream upon the old twin bridges on Highway 72 as well.  This forced workers to close the structure for more than five hours until engineers could inspect the damage.  Only minor damage was found and the bridge was reopened before noon.

Flash Flood in LAUDERDALE, ALABAMA
From 02-MAY-10 20:20:00 to 02-MAY-10 21:50:00 (CST-6)
Location: ARKDELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several county roads were reported closed due to high water across eastern Lauderdale county.

Flood in COLBERT, ALABAMA
From 02-MAY-10 16:45:00 to 02-MAY-10 22:45:00 (CST-6)
Location: VALDOSTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Urban and street flooding reported in Tuscumbia. Ditches along side of roads were seen full of debris flowing into some streets.

Flash Flood in MORGAN, ALABAMA
From 02-MAY-10 21:34:00 to 02-MAY-10 22:04:00 (CST-6)
Location: HARTSELLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Peach Orchard Road was reported impassable due to flash flooding.

Flood in MADISON, ALABAMA
From 02-MAY-10 21:28:00 to 03-MAY-10 03:28:00 (CST-6)
Location: HUNTSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Greenacres Drive in western portions of Huntsville was reported flooded.

Flood in MADISON, ALABAMA
From 02-MAY-10 21:35:00 to 03-MAY-10 03:35:00 (CST-6)
Location: REDSTONE AAF
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Portions of Madison Blvd. between Slaughter road and Governors West were reported underwater near Indian Creek. This flooding was caused by Indian Creek overflowing its banks.

Flood in MORGAN, ALABAMA
From 02-MAY-10 21:15:00 to 03-MAY-10 03:15:00 (CST-6)
Location: RUSSELL HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Denise Drive in Decatur was reported flooded.

Flash Flood in CULLMAN, ALABAMA
From 03-MAY-10 00:00:00 to 03-MAY-10 02:00:00 (CST-6)
Location: CULLMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of CR 1401 were washed away by flash flooding.

Flash Flood in CULLMAN, ALABAMA
From 03-MAY-10 00:00:00 to 03-MAY-10 02:00:00 (CST-6)
Location: GOLD RIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of CR 1488 were washed away by flash flooding.