ATLANTA (NEXSTAR/KFOR) — Storms dumped as much as 6 inches of rain on Mississippi and Alabama ahead of threatening weather that forecasters say could include tornadoes across a large part of the South from Texas to Georgia.

Oklahoma could see snow and severe storms too!

The downpours caused isolated flooding in west Alabama on Tuesday. The Storm Prediction Center says large hail and intense twisters are possible across the region Wednesday.

“Widespread severe storms capable of producing tornadoes (several of which may be intense), very large hail and intense damaging wind gusts are expected. More than one round of severe storms are possible across parts of Mississippi into Alabama during the afternoon into the overnight hours,” said the center in an update.

There is a severe weather threat tonight for Oklahoma.

Although initially moisture is limited its a very strong dynamic storm system!

Make sure you have a way to get severe warnings while you are sleeping tonight 1 Am to 4 AM. and the best way is through the KFOR 4WarnMe app

Here’s the latest…It’s a Slight to Enhanced Risk for severe thunderstorms this evening and overnight tonight.

The timeline is about 8PM to 4AM western and central OK.

Main threats large hail and damaging winds but isolated tornadoes possible. 

Meanwhile, more than 6 million people live in an area stretching from eastern Arkansas to eastern Alabama that forecasters say is most at risk for violent weather.

A volatile airmass will build across much of Alabama, Southern Tennessee, Mississippi, and Eastern Arkansas, according to WHNT. The atmosphere will de-stabilize, meaning the air is primed to fuel thunderstorms. A tremendous amount of helicity (spin storms can use to rotate) will be in place to support rotating storms called supercells.

If you’re traveling in the region Wednesday, know where you are at all times and have a way to get weather warnings.

The Associated Press contributed to this report.