Days of heavy rain to soak South as flood threat grows for New Orleans, Mobile

Tropical moisture brings days of rain to South

The FOX Forecast Center is monitoring multiple days of flash flooding across the Deep South as several waves of rain push throughout the region.

New Orleans and Mobile, Alabama, are bracing for heavy rainfall on Monday, but the real flood threat ramps up Tuesday. Widespread, heavy rain is expected to soak the Deep South, potentially leading to significant flooding.

The FOX Forecast Center said some areas could see over 3 inches of rain through Wednesday, providing drought relief for many. Additionally, a low threat of severe storms is possible on Tuesday and Wednesday.

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A three-hour radar loop showing where showers and thunderstorms are ongoing. Severe Thunderstorm Warnings are indicated in yellow. Tornado Warnings are indicated in red, while Tornado Warnings with a confirmed tornado are indicated in purple. Flash Flood Warnings are indicated in green, while Flash Flood Emergencies are indicated in pink.
(FOX Weather)

The FOX Forecast Center said rain will continue Monday morning as a weak area of low pressure starts to develop. A warm front will position itself along the northern Gulf Coast, confining the worst rain to places like Louisiana and southern Alabama. Places like New Orleans and Mobile are on the bullseye to start the workweek.

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The multiday flash flood threat across the South.
(FOX Weather)

A Flood Watch remains in effect for portions of southeast Louisiana and southern Mississippi through Tuesday morning.

A look at the flood alerts issued in the Southeast through Tuesday.
(FOX Weather)

As this low organizes and rapidly lifts north, a powerful cold front will form, pulling an abundant amount of moisture from the Gulf, the FOX Forecast Center said.

Late Tuesday will be the biggest period for flash flooding as the threat grows to cover cities from Atlanta to Mobile and eventually the entire East Coast.

When all is said and done, rain totals across Texas, Louisiana, Alabama, and Georgia will add up to a widespread 2-3 inches, with locally higher amounts of more than 5 inches possible. This will be beneficial for far southeastern Texas and central Alabama, which are still in severe to extreme drought.

This graphic shows the forecast rain totals in the Southeast through Wednesday, Dec. 11, 2024.
(FOX Weather)

Additionally, outside the chance for flash flooding, the FOX Forecast Center is monitoring for a couple of days of severe storms for the Deep South coming late Tuesday. Damaging wind gusts and a tornado or two as the cold front rapidly moves through.