Louisiana and Mississippi Reel From Isaac's Deluge

By , Meteorologist
September 01, 2012; 3:27 PM
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Flooding photo from Louisiana is from Flickr user multimediampre.

More than half a million customers remain without power in Louisiana, while communities in Louisiana and Mississippi are still reeling from Isaac's deluge with multiple areas recovering from dam breaks or controlled releases of dams to prevent a disaster.

According to Entergy, 526,326 people were still in the dark in Louisiana as of 6:30 a.m. EDT Friday.

Meanwhile, with fears of the breaching of the Percy Quin Dam south of McComb, Miss., due to being stressed by Isaac's heavy rainfall, evacuations were forced for Tangipahoa Parish in Louisiana on Thursday.

The Associated Press reports that a controlled breach of the Percy Quin Dam began late Thursday afternoon to prevent a failure of the dam that could send flood waters rushing south into communities such as Kentwood, La.

Dams have also failed in Slidell, La., and a controlled breach was performed in Plaquemines Parish, La.

Animated satellite loop of Isaac moving across the Gulf. Satellite images from NOAA.

Excessive Rainfall Amounts

Florida

Vero Beach: 16.60 inches

Royal Palm Beach: 16.29 inches

Boynton Beach: 14.41 inches

Port St. Lucie: 13.04 inches

Aberdeen: 12.41 inches

Palm City: 11.69 inches

Louisiana

New Orleans: 20.08 inches

Reserve: 13.46 inches

Livingston: 13.16 inches

Hammond: 11.93 inches

Terrytown: 10.56 inches

Slidell: 10.40 inches

Mississippi

Kiln: 17.04 inches

Marion: 15.02 inches

Saucier: 12.78 inches

Picayune: 12.17 inches

Diamondhead: 12.04 inches

Long Beach: 11.95 inches

Alabama

Grand Bay: 11.07 inches

Mobile: 9.67 inches

Wilmer: 8.75 inches

Fairhope: 6.42 inches

Daphne: 5.87 inches

Theodore: 5.12 inches

"Just witnessed water rescue of dozens of people trapped in their homes by flooding in Braithwaite, LA. #isaac," tweeted Tim Wetzel on Wednesday, Aug. 29, 2012.

Storm Surge Heights

Louisiana

Shell Beach: Between 9 and 11 feet

Lake Pontchartrain at New Orleans: Around 6 feet

Grand Isle: Around 5 feet

Mississippi

Pascagoula: Around 4 feet

Alabama

Mobile Bay: Around 3-5 feet

Severe Weather Spawned by Isaac

On Thursday, Aug. 30, 2012, five tornadoes touched down in Mississippi and Alabama. On Wednesday, Aug. 29, 2012, Isaac spawned seven tornadoes across southern portions of Mississippi and Alabama. As a tropical storm, Isaac had produced two tornadoes in Florida on Monday, Aug. 27, 2012.

Toxey, Ala.

Trees were downed and snapped by a possible tornado 1 mile east of Toxey, Ala., on Thursday, Aug. 30, 2012.

Increase, Miss.

A possible tornado destroyed a barn, damaged a second barn and knocked down numerous trees near Increase, Miss., on Thursday, Aug. 30, 2012.

Crandall, Miss.

A tornado touched down, destroying a home and injuring two people near Crandall, Miss., on Thursday, Aug. 30, 2012.

Meridian, Miss.

A tornado touched down near Meridian, Miss., downing trees and power lines on Thursday, Aug. 30, 2012.

Pascagoula, Miss.

A tornado was spotted on Market Street in Pascagoula, Miss., on Thursday, Aug. 30, 2012.

Estothel, Ala.

Power lines and trees were downed and a roof was torn off of a house by a tornado 5 miles southeast of Estothel, Ala., Wednesday night, Aug. 29, 2012.

Sand Hill, Miss.

Debris from a possible tornado was observed about 3 miles southeast of Sand Hill, Miss., late Wednesday, Aug. 29, 2012.

Gulf Park Estates, Miss.

A tornado damaged homes and knocked down trees and power lines late Wednesday, Aug. 29, 2012.

Old Texas, Ala.

Emergency Management reported a possible tornado in northeastern Monroe County, Ala., about 2 miles northeast of Old Texas on Wednesday, Aug. 29, 2012.

McHenry, Miss.

Stone County Emergency Management reports that a roof was torn off of a grocery store by a possible tornado on Wednesday, Aug. 29, 2012.

Gulfport, Miss.

Two tornadoes struck Gulfport, Miss., on Wednesday, Aug. 29, 2012. Structural damage from a possible tornado was reported in the Orange Grove area. Another twister damage several homes in the vicinity of 17th Street and 19th Avenue.

Tampa, Fla.

A waterspout moved onshore on Monday, Aug. 27, 2012, damaging six homes 2 miles east-southeast of Tampa, Fla. Fences, trees and roofs were damaged on the properties.

Vero Beach, Fla.

An EF-0 tornado touched down on Monday, Aug. 27, 2012, impacting Vero Palm Estates, Countryside Mobile Home Park and Paraside Park Lifting about 5 miles west of Vero Beach. The tornado produced a discontinuous damage path, including minor damage to 62 structures and major damage to 31 structures.

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