Mississippi Flooding Update: More Flood Gates Opened at Morganza Spillway; Mississippi River Closed to Shipping

AP Photo

The Army corps of Engineers announced that they had opened a 16th lock on the 125-bay Morganza spillway on Wednesday, sending an estimated 108,000 cubic feet of water per second gushing through the flood control structure.

26 parishes (counties in Louisiana) have been declared disaster areas, with E. Felicicana, LaFourche, Franklin and Richland parishes being added recently. Parts of St. Martin's Parish- just east of Lafayette, LA- are under a mandatory evacuation order on Wednesday in advance of the approaching flood waters.

Further downstream (but north of New Orleans), the Corps of Engineers said they had opened up nearly 330 of the 350 bays on the Bonne Carre spillway, sending water from the Mississippi River rushing through at a rate of 316,000 cubic feet per second into Lake Pontchartrain.

To the north, the US Coast Guard had closed down the Mississippi River around Natchez, MS to shipping earlier this week over concerns about additional strain on the levees from barges and river traffic. However, the New Orleans Times-Picayune reported that the Coast Guard was allowing barges loaded with coal, timber, iron and steel to pass through at the minimum speed.

Local officials on both sides of the river from Mississippi town of Natchez breathed a sigh of relief as the Coast Guard and NOAA revised their estimate for the floodwater's crest from 63 feet down to 62 .5 feet. The crest is expected to be reached on Saturday- the previous high water mark dates back to 1937 at 58.4 feet.

Pat over at And So it Goes in Shreveport has much much more.

At Least 269 Killed As Second Round of Deadly Storms, Tornadoes Rake Southeastern US

At least 269 people were killed in 6 states after another storm system moving through the southeastern USA spawned deadly tornadoes on Wednesday.

Dozens of tornadoes roared through north-central Mississippi, Alabama and Georgia on Wednesday, splintering towns and families in one of the deadliest natural disasters in U.S. history. The worst of it fell along a path that began in Tuscaloosa and stretched eastward through Birmingham, where 100-mph winds crushed houses, schools and businesses.

"There is massive devastation out there," a grim Gov. Robert Bentley said during an appearance today on Good Morning America.

Bentley, a Tuscaloosa native, declared a state of emergency and mobilized about 2,000 Alabama National Guardsmen. He said emergency responders were still trying to locate survivors and identify the bodies of the deceased.

Across the Southeast, more than 200 were confirmed dead in one of the deadliest outbreaks in nearly 40 years. Dave Imy, a meteorologist with the National Weather Service, said the number of deaths was the most in a tornado outbreak since 1974, when 315 people died.

The 1974 'Super Outbreak' was through to have generated 148 tornadoes from Laurel, MS to as far north as Windsor, ON, Canada. The Southwestern Ohio town of Xenia bore the brunt of a ½ mile wide funnel cloud that killed more than 30 people.

Wednesday's storms had nearly matched the 1974 outbreak in terms of scope and casualties.

The National Weather Service's Storm Prediction Center in Norman, Okla., said it received 137 tornado reports into Wednesday night. The storms forced authorities in some places into makeshift command posts after their headquarters lost power or were damaged, and an Alabama nuclear plant was using backup generators to cool units that were shut down.

A tornado expert at the Oklahoma center said it appears some of the tornadoes were as wide as a mile and likely packed a wallop that only 1 in 100 twisters ever reach. It could be days, however, before scientists make an official determination.

Footage from storms chasers north of Philadelphia, MS on Apr. 27, 2011

The storm killed at least 33 people in Mississippi prompting Gov. Haley Barbour to declare a state of emergency for 39 Mississippi counties.