A surge of moisture and unstable air aloft (steep mid level lapse rates) created a favorable environment for strong to severe thunderstorms producing large hail as a weak cold front dropped southeast into the Tennessee Valley.  Although low level wind shear was relatively weak, mid to upper level shear sustained a few supercell thunderstorms that generated the largest hail up to golf ball sized.   The storms developed rapidly during the mid afternoon hours across northern Alabama ahead of the cold front.  As the evening wore on, new storms developed in far northwest Alabama right along the cold front.  These progressed southeast of the area before Midnight.  Unfortunately, one person was injured after being struck by lightning in their residence in Cullman County.

Hail in MARSHALL, ALABAMA
From 31-MAR-15 13:22:00 to 31-MAR-15 13:22:00 (CST-6)
Location: ALLEN XRDS
Magnitude: 0.75 
Crop damage: 0.00K
Reported by: Public

Penny sized hail was reported.

Hail in CULLMAN, ALABAMA
From 31-MAR-15 13:28:00 to 31-MAR-15 13:28:00 (CST-6)
Location: HOLLY POND
Magnitude: 1.25 
Crop damage: 0.00K
Reported by: Public

Half dollar sized hail was reported.

Hail in MARSHALL, ALABAMA
From 31-MAR-15 13:52:00 to 31-MAR-15 13:52:00 (CST-6)
Location: GRANT
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Broadcast Media

Quarter sized hail was reported.

Hail in DEKALB, ALABAMA
From 31-MAR-15 14:30:00 to 31-MAR-15 14:30:00 (CST-6)
Location: RAINSVILLE
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail was reported.

Hail in MARSHALL, ALABAMA
From 31-MAR-15 14:30:00 to 31-MAR-15 14:30:00 (CST-6)
Location: GRANT
Magnitude: 1.75 
Crop damage: 0.00K
Reported by: Emergency Manager

Golf ball sized hail was reported.

Hail in COLBERT, ALABAMA
From 31-MAR-15 14:42:00 to 31-MAR-15 14:42:00 (CST-6)
Location: ALLSBORO
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter sized hail was reported.

Hail in COLBERT, ALABAMA
From 31-MAR-15 14:44:00 to 31-MAR-15 14:44:00 (CST-6)
Location: MAUD
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter sized hail was reported.

Hail in CULLMAN, ALABAMA
From 31-MAR-15 15:15:00 to 31-MAR-15 15:15:00 (CST-6)
Location: TRIMBLE
Magnitude: 1.75 
Crop damage: 0.00K
Reported by: Emergency Manager

Golf ball sized hail was reported.

Hail in FRANKLIN, ALABAMA
From 31-MAR-15 15:32:00 to 31-MAR-15 15:32:00 (CST-6)
Location: RUSSELLVILLE
Magnitude: 0.88 
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel sized hail was reported.

Hail in CULLMAN, ALABAMA
From 31-MAR-15 16:00:00 to 31-MAR-15 16:00:00 (CST-6)
Location: GOOD HOPE
Magnitude: 1.75 
Crop damage: 0.00K
Reported by: Emergency Manager

Golf ball sized hail was reported.

Hail in MARSHALL, ALABAMA
From 31-MAR-15 16:36:00 to 31-MAR-15 16:36:00 (CST-6)
Location: DOUGLAS
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Public

Quarter sized hail was reported on Highway 75 near the Blount County line.

Hail in CULLMAN, ALABAMA
From 31-MAR-15 16:50:00 to 31-MAR-15 16:50:00 (CST-6)
Location: JOPPA
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter sized hail was reported.

Hail in CULLMAN, ALABAMA
From 31-MAR-15 16:54:00 to 31-MAR-15 16:54:00 (CST-6)
Location: HOLLY POND
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter sized hail was reported.

Hail in MARSHALL, ALABAMA
From 31-MAR-15 17:13:00 to 31-MAR-15 17:13:00 (CST-6)
Location: ALBERTVILLE
Magnitude: 0.88 
Crop damage: 0.00K
Reported by: Emergency Manager

Nickel sized hail was reported in the Laddywood community in Marshall county.

Hail in MARSHALL, ALABAMA
From 31-MAR-15 17:26:00 to 31-MAR-15 17:26:00 (CST-6)
Location: UNION GROVE
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail was reported.

Hail in MARSHALL, ALABAMA
From 31-MAR-15 17:30:00 to 31-MAR-15 17:30:00 (CST-6)
Location: ARAB
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter sized hail was reported at Mobbs School road and Highway 431 in Marshall county.

Hail in LAUDERDALE, ALABAMA
From 31-MAR-15 18:23:00 to 31-MAR-15 18:23:00 (CST-6)
Location: WATERLOO
Magnitude: 1.75 
Crop damage: 0.00K
Reported by: Amateur Radio

Golf ball sized hail was reported on main street in Waterloo, Alabama.

Hail in LAUDERDALE, ALABAMA
From 31-MAR-15 18:45:00 to 31-MAR-15 18:45:00 (CST-6)
Location: WATERLOO
Magnitude: 0.88 
Crop damage: 0.00K
Reported by: Amateur Radio

Nickel sized hail was reported.

Hail in LAUDERDALE, ALABAMA
From 31-MAR-15 19:08:00 to 31-MAR-15 19:08:00 (CST-6)
Location: WATERLOO
Magnitude: 1.75 
Crop damage: 0.00K
Reported by: Broadcast Media

Golf ball sized hail was reported. Relayed through social media via Broadcast media.

Hail in COLBERT, ALABAMA
From 31-MAR-15 19:41:00 to 31-MAR-15 19:41:00 (CST-6)
Location: RIVERTON
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter sized hail was reported to be covering the ground.

Flash Flood in LAUDERDALE, ALABAMA
From 31-MAR-15 20:00:00 to 31-MAR-15 21:00:00 (CST-6)
Location: GREEN HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Up to 12 inches of water was reported over the road along County Road 8 near Green Hill, Alabama.

Hail in DEKALB, ALABAMA
From 31-MAR-15 20:03:00 to 31-MAR-15 20:03:00 (CST-6)
Location: LEBANON
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter sized hail was reported on Interstate 59 between Collinsville and Fort Payne, about three miles south of Fort Payne, Alabama.

Flash Flood in LAUDERDALE, ALABAMA
From 31-MAR-15 19:00:00 to 31-MAR-15 19:00:00 (CST-6)
Location: WATERLOO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A local Lauderdale county man drowned after he was stuck in his truck while attempting to cross high waters along Panther Creek near County Road 105 in Waterloo, Alabama.

Lightning in LAWRENCE, ALABAMA
From 31-MAR-15 21:25:00 to 31-MAR-15 21:25:00 (CST-6)
Location: MOULTON
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Lightning struck a 100 foot tower at the Lawrence county, Alabama emergency management/911 facility. EMA officials reported that there was damage to the tornado early warning system and 911 phone lines.

Hail in LAUDERDALE, ALABAMA
From 31-MAR-15 06:12:00 to 31-MAR-15 06:12:00 (CST-6)
Location: WATERLOO
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter sized hail was reported on the northwest side of Waterloo.

Hail in LAUDERDALE, ALABAMA
From 31-MAR-15 06:12:00 to 31-MAR-15 06:12:00 (CST-6)
Location: WATERLOO
Magnitude: 0.88 
Crop damage: 0.00K
Reported by: Amateur Radio

Nickel sized hail was reported on Main street in Waterloo.

Hail in MORGAN, ALABAMA
From 31-MAR-15 12:52:00 to 31-MAR-15 12:52:00 (CST-6)
Location: HARTSELLE
Magnitude: 1.25 
Crop damage: 0.00K
Reported by: Broadcast Media

Half dollar sized hail was reported.

Lightning in CULLMAN, ALABAMA
From 31-MAR-15 13:05:00 to 31-MAR-15 13:05:00 (CST-6)
Location: CULLMAN
Crop damage: 0.00K
Reported by: Emergency Manager

A 27 year old female was struck by lightning while leaning against a metal door frame. Victim was transported to a local hospital with non-life threatening injuries.

Hail in CULLMAN, ALABAMA
From 31-MAR-15 13:13:00 to 31-MAR-15 13:13:00 (CST-6)
Location: FAIRVIEW
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail was reported.