Louisiana could be in for some strong thunderstorms and heavy rain Tuesday night through Thursday night, according to the national Weather Service.
There's a slight chance of severe weather, with the primary risks being damaging winds and tornadoes.
Showers and thunderstorms will move in from the west late Tuesday, according to the weather service.
In south Louisiana, there's a 70 percent chance of rain all day Wednesday, rising to 90 percent by evening. Thursday's rain chances are 80 percent during the day, dropping 60 percent by evening.
The national Storm Prediction Center says nearly 60 million people in several states — including Texas, Oklahoma, Arkansas, Louisiana and Mississippi — will be at risk for severe storms Wednesday into Thursday.
In Mississippi, forecasters say multiple rounds of storms could drop 3-5 inches of rain, with even higher amounts in some spots.
In Alabama, forecasters say hail to the size of quarters will be possible in parts of the state, including Birmingham. Rain totals between 2 to 3 inches are being forecast for northern Alabama.
Forecasters say many large cities will be at risk, including Dallas, Oklahoma City, Kansas City and New Orleans.
The Associated Press contributed to this story