A slow moving cold front provided a focus for several waves of thunderstorms and heavy rain over a 3 day period. Several reports of tornadoes and flash flooding were received during the period.

Thunderstorm Wind in ASSUMPTION, LOUISIANA
From 21-MAR-12 08:25:00 to 21-MAR-12 08:25:00 (CST-6)
Location: GRAND BAYOU
Magnitude: 60.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Louisiana GOHSEP relayed reports of minor damage to 8 mobile homes, trees down on Louisiana Highway 996 and power poles down on Louisiana Highway 70.

Flash Flood in TERREBONNE, LOUISIANA
From 23-MAR-12 04:42:00 to 23-MAR-12 06:30:00 (CST-6)
Location: HOUMA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Major street flooding reported in the northern part of Terrebonne Parish. Several roads were inundated and closed. No water was reported in homes. Bayou Terrebonne remained in banks.

Flash Flood in LAFOURCHE, LOUISIANA
From 23-MAR-12 06:27:00 to 23-MAR-12 08:00:00 (CST-6)
Location: RACELAND JCT
Flood cause: Heavy Rain
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Ten to twenty homes in the Raceland and Lockport areas had water enter them. A business in the Lockport area had approximately 4 inches of water inside. Extensive street flooding was also reported.

Thunderstorm Wind in LIVINGSTON, LOUISIANA
From 21-MAR-12 09:00:00 to 21-MAR-12 09:00:00 (CST-6)
Location: WALKER
Magnitude: 55.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Scattered trees were reported down across the parish.

Thunderstorm Wind in LIVINGSTON, LOUISIANA
From 21-MAR-12 09:09:00 to 21-MAR-12 09:09:00 (CST-6)
Location: SATSUMA
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A roof was damaged on a house on Satsuma Road east of Walker.

Tornado in LIVINGSTON, LOUISIANA
From 21-MAR-12 09:05:00 to 21-MAR-12 09:08:00 (CST-6)
Location: CORBIN
Tornado F-scale: EF1
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A weak tornado touched down just south of Varnado Road and tracked north-northwest across North Corbin Road. A home lost a portion of the roof and several trees were snapped along the track. The tornado lifted to the southwest of North Corbin Elementary School. The storm path length was approximately 0.5 miles, the path width 50 yards, and maximum strength EF1 with estimated winds of 100 mph.

Thunderstorm Wind in LIVINGSTON, LOUISIANA
From 21-MAR-12 09:15:00 to 21-MAR-12 09:15:00 (CST-6)
Location: LIVINGSTON
Magnitude: 55.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A large tree was blown down which heavily damaged the roof of a home.

Thunderstorm Wind in JEFFERSON, LOUISIANA
From 21-MAR-12 11:15:00 to 21-MAR-12 11:15:00 (CST-6)
Location: WAGGAMAN
Magnitude: 55.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Public

A tree was blown down at a wrecker service with a fence damaged. Large tree limbs were also blown down in the area.

Tornado in ST. TAMMANY, LOUISIANA
From 21-MAR-12 11:16:00 to 21-MAR-12 11:19:00 (CST-6)
Location: HOULTONVILLE
Tornado F-scale: EF0
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A NWS storm survey team observed damage produced by a tornado northeast of Madisonville. The tornado touched down near the clubhouse in the Tchefuncta Country Club Estates neighborhood. The tornado continued on a path to the northeast, downing several trees and producing minor roof damage to two homes before lifting in a heavily wooded area beyond the neighborhood. The tornado had a path width of approximately 100 yards and a path length of one half mile.

Tornado in ST. TAMMANY, LOUISIANA
From 21-MAR-12 11:35:00 to 21-MAR-12 11:40:00 (CST-6)
Location: ABITA SPGS
Tornado F-scale: EF0
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Weak EF0 tornado touched down near the intersection of Silver Springs Drive and Allen Road. It moved north, snapping several pine trees. Some roof damage was observed to one home where part of a tree had fallen through the roof. The tornado lifted after crossing Jarrell Road. Maximum estimated wind speed was 65 mph, maximum width 25 yards, and path length approximately 1.5 miles. Event time was based on radar.

Flash Flood in ST. TAMMANY, LOUISIANA
From 21-MAR-12 16:50:00 to 21-MAR-12 18:00:00 (CST-6)
Location: SLIDELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Flash flooding of Bonfouca Drive in the Palm Lake Subdivision was reported by the Slidell Fire Department.

Flash Flood in ST. CHARLES, LOUISIANA
From 23-MAR-12 03:45:00 to 23-MAR-12 05:00:00 (CST-6)
Location: HAHNVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Extensive flooding beginning to be reported throughout St. Charles Parish.

Tornado in ASCENSION, LOUISIANA
From 21-MAR-12 08:34:00 to 21-MAR-12 08:43:00 (CST-6)
Location: PRAIRIEVILLE
Tornado F-scale: EF1
Property damage: 200.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A NWS storm survey team confirmed a tornado touched down and tracked through portions of Prairieville. The tornado initially touched down along Duplessis Road, tracked approximately 3 miles before lifting after crossing near the intersection of Highways 42 and 930. Several homes received significant roof damage and many trees were uprooted or snapped. The path width was approximately 50 yards with an estimated wind speed of 110 mph.

Tornado in EAST BATON ROUGE, LOUISIANA
From 21-MAR-12 08:43:00 to 21-MAR-12 08:44:00 (CST-6)
Location: KLEINPETER
Tornado F-scale: EF1
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down and several homes suffered roof damage on Hoo Shoo Too Road.