A closed upper low moved across the southern United States.

Flash Flood in WASHINGTON, LOUISIANA
From 10-MAR-16 22:00:00 to 11-MAR-16 15:00:00 (CST-6)
Location: MT HERMON
Flood cause: Heavy Rain
Property damage: 1.60M
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall of 8 to 15 inches fell across much of the parish during the evening and overnight hours. A rainfall observer near Mt. Hermon, in the far northwest section, recorded 16 inches of rainfall. The runoff from the heavy rainfall produced life threatening flash flooding in many areas of the parish. An estimated 1100 homes were flooded along with 30 churches. Approximately 80 roads were damaged or made impassable, mainly from washed out culverts and bridges.  Areas that were especially hard hit was near the Fairgrounds in Franklinton, areas of Bogalusa and areas around Mt. Hermon. Numerous search and rescue operations were conducted in the overnight hours rescue residents and motorists from flooded areas. Runoff from the rainfall eventually flowed into the large streams and rivers. Major flood levels were reached on the Bogue Chitto River at Franklinton, the highest level since the severe flooding of April 1983.  In the lower portion of the Bogue Chitto River, record crests were reach surpassing the 1983 flooding.

Flood in ST. TAMMANY, LOUISIANA
From 11-MAR-16 15:00:00 to 15-MAR-16 23:00:00 (CST-6)
Location: SUN
Flood cause: Heavy Rain
Property damage: 300.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rainfall across southeast Louisiana and south Mississippi caused the lower Pearl River to reach its highest level since the flooding in the spring of 1983.  The gage at Pearl River, LA reached 20.35 feet on the 14th, its 2nd highest reading on record, only surpassed by the April 1983 flood.  Several areas, including housing subdivisions, from the community of Pearl River to the southeast portion of Slidell had roadway flooding with a few houses being flooded. Water encroached onto the shoulders of Interstate 10 east of Slidell, but did not cross into the traffic lanes.

Flash Flood in TANGIPAHOA, LOUISIANA
From 10-MAR-16 19:00:00 to 11-MAR-16 15:00:00 (CST-6)
Location: GREENLAW
Flood cause: Heavy Rain
Property damage: 1.50M
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rainfall of 8 to 15 inches across all but far southeast Tangipahoa Parish during the overnight hours of March 10-11th resulted in numerous reports of flash flooding with many roads flooded and impassable. Flooding also developed along the Tangipahoa River and and other large streams. Over 200 roads were closed due to the flooding and bridges were washed out on Louisiana Highways 1061 and 1054. Emergency management reported approximately 1850 homes were flooded in the parish. Approximately 2800 residents had to be evacuated from areas where their residences were either flooded or isolated in flood waters. Several subdivisions in around Hammond were especially hard hit.

Flood in TANGIPAHOA, LOUISIANA
From 11-MAR-16 15:00:00 to 15-MAR-16 23:00:00 (CST-6)
Location: LORANGER
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Major river flooding developed along the Tangipahoa River and other large streams due to the heavy rainfall. Many houses were either flooded or had access cut-off especially in the far southern sections of the parish south of Interstate 12.  Water encroached on Interstate 12 near Robert with one west bound land blocked due to high water.

Thunderstorm Wind in TERREBONNE, LOUISIANA
From 11-MAR-16 04:11:00 to 11-MAR-16 04:11:00 (CST-6)
Location: GRAY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down in the 4400 block of Bayou Black Road.

Flood in ST. TAMMANY, LOUISIANA
From 11-MAR-16 15:00:00 to 15-MAR-16 23:00:00 (CST-6)
Location: FOLSOM
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rainfall of 6 to 12 inches that fell during the overnight hours of March 10 into the morning of March 11 resulted in major and historic flooding along the Bogue Falaya and Tchefuncte Rivers of St Tammany Parish. Many areas along these rivers and tributaries experienced flooding with several hundred houses flooding. The Bogue Falaya River had a record crest at the Boston Street gage in Covington of 20.07 feet with water overtopping the Boston Street bridge. Historic flooding also occurred along the Tchefuncte River with flooding reported in several subdivisions.

Flash Flood in LIVINGSTON, LOUISIANA
From 10-MAR-16 20:00:00 to 11-MAR-16 15:00:00 (CST-6)
Location: WEISS
Flood cause: Heavy Rain
Property damage: 1.80M
Crop damage: 0.00K
Reported by: Broadcast Media

Approximately 6 to 12 inches of rain fell across all but western Livingston Parish during the overnight hours. Over 100 roads were flooded.

Flood in WASHINGTON, LOUISIANA
From 11-MAR-16 15:00:00 to 13-MAR-16 23:00:00 (CST-6)
Location: BICKHAM
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from the heavy rainfall caused the Bogue Chitto River to reach its highest levels since the April 1983 flood event, and surpass the 1983 flood event in the lower portion of the river. A historic crest of 21.36 feet was reached on the Bush, LA river gage on March 12.

Flash Flood in ST. HELENA, LOUISIANA
From 10-MAR-16 22:00:00 to 11-MAR-16 13:00:00 (CST-6)
Location: LIVERPOOL
Flood cause: Heavy Rain
Property damage: 600.00K
Crop damage: 0.00K
Reported by: Emergency Manager

An estimated 6 to 10 inches of rain fell across southeast St Helena Parish during the late evening and overnight hours. Parish emergency management reported that 61 homes had some type of flooding and 46 roadways were damaged by flooding.

Flash Flood in ST. TAMMANY, LOUISIANA
From 10-MAR-16 23:00:00 to 11-MAR-16 15:00:00 (CST-6)
Location: FOLSOM
Flood cause: Heavy Rain
Property damage: 4.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Widespread heavy rainfall of 6 to 12 inches across northwest St Tammany Parish during the overnight and morning hours resulted in widespread flash flooding. Numerous roads were flooded during the night in the affected areas. High water rescues were conducted at a number of locations from flooded houses or houses isolated by flood waters. Approximately 90 people were were rescued from Camp Abbey Retreat Center on Friday - March 11. Heavy rainfall eventually caused the Baogue Falaya River, Tchefuncte River and Pearl River to reach major or historic flood levels in the few days following the heavy rainfall. A total of 625 structures within the parish were flooded from flash flooding or riverine flooding with 425 classified as major flood damage or destroyed.