A very unstable air mass developed as early as midday across the central Tennessee Valley.  Scattered strong to severe thunderstorms developed by late morning producing very heavy rainfall that resulted in isolated flash flooding in northeast Madison County.  A few of these initial storms produced small hail.  As instability increased during the mid to late afternoon, more numerous thunderstorms developed.  Outflow boundary collisions triggered rapid development of new storms which became severe rather quickly in a few instances.  A few reports of large hail and damaging winds were received into the mid evening hours.  Isolated flash flooding occurred again in northeastern Madison County and in the town of Bridgeport in Jackson County where water depth climbed up to two feet.  One person was struck by lightning in the town of Fairview in Cullman County.  Additional thunderstorms moved northwest out of Georgia during the late evening hours producing additional rainfall, but diminished rather quickly after midnight.

Lightning in CULLMAN, ALABAMA
From 15-MAY-09 19:20:00 to 15-MAY-09 19:20:00 (CST-6)
Location: FAIRVIEW
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A person was struck by lightning on CR 1536 in the Fairview area.

Hail in CULLMAN, ALABAMA
From 15-MAY-09 19:02:00 to 15-MAY-09 19:07:00 (CST-6)
Location: FAIRVIEW
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Nickel size hail was reported in the Fairview communty.

Hail in MORGAN, ALABAMA
From 15-MAY-09 18:44:00 to 15-MAY-09 19:49:00 (CST-6)
Location: HUNTSVILLE LACEYS SP
Magnitude: 1.75 
Crop damage: 0.00K
Reported by: Broadcast Media

Golfball size hail was reported in the Lacey Springs area.

Thunderstorm Wind in JACKSON, ALABAMA
From 15-MAY-09 19:45:00 to 15-MAY-09 19:55:00 (CST-6)
Location: BRIDGEPORT
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down a tree onto Jacobs Avenue in Bridgeport.

Lightning in CULLMAN, ALABAMA
From 15-MAY-09 19:50:00 to 15-MAY-09 19:50:00 (CST-6)
Location: GOOD HOPE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Lighting struck a person along Good Hop School Road. Other details unknown.

Thunderstorm Wind in MADISON, ALABAMA
From 15-MAY-09 10:44:00 to 15-MAY-09 10:49:00 (CST-6)
Location: HILLSBORO
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm winds blew down a tree and some other large branches along Winchester Road.

Thunderstorm Wind in MADISON, ALABAMA
From 15-MAY-09 12:40:00 to 15-MAY-09 12:45:00 (CST-6)
Location: PLEVNA
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Employee

Power lines were knocked down on Buddy Williamson Road. Time was estimated from radar.

Thunderstorm Wind in MORGAN, ALABAMA
From 15-MAY-09 19:15:00 to 15-MAY-09 19:20:00 (CST-6)
Location: WEST PT
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm winds blew down a tree across Apple Grove Road south of Union Hill. Time was estimated from radar.

Flash Flood in MADISON, ALABAMA
From 15-MAY-09 17:45:00 to 15-MAY-09 19:15:00 (CST-6)
Location: ROSEBORO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Heavy rainfall from strong to severe thunderstorms produced water six inches deep over Alabama Line Road. Also, water was reported flowing across Honey Drive nearby.

Flash Flood in JACKSON, ALABAMA
From 15-MAY-09 19:45:00 to 15-MAY-09 23:00:00 (CST-6)
Location: BRIDGEPORT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Strong to severe thunderstorms caused two to three feet of water to accumulate over Broadway Avenue between 8th and 9th Street.  Other streets that were impacted included:  Bleeker Street, Aldhouse Avenue, and Moore Avenue.

Flash Flood in MADISON, ALABAMA
From 15-MAY-09 11:40:00 to 15-MAY-09 14:40:00 (CST-6)
Location: HILLSBORO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rainfall caused flash flooding which closure of Old Mountain Fork Road near Winchester Road.