Less than three weeks after a historic tornado outbreak devastated portions of the central and southern United States, another round of feisty severe weather could be delivered in the final days of 2021.

AccuWeather forecasters are eyeing a developing storm as it pushes across the Midwest. In the coming days, stormy weather is forecast to develop across a wide swath of the central and eastern United States. While snow may fall for portions of the Upper Midwest and Great Lakes, a different hazard will develop farther south beginning late Tuesday.

At the root of the hazard is an overabundance of warm, moist air which is set to be transported from the Gulf of Mexico to portions of the southeastern U.S. by midweek.

“This pattern will allow moisture to work well northward into portions of Louisiana, Arkansas, Mississippi, Alabama and even Tennessee on Wednesday and could expand further into the southern Appalachian Mountains Wednesday night,” said AccuWeather Senior Meteorologist Matt Rinde.

This abundant moisture, when coupled with unseasonably warm conditions already in place across much of the South, can set the stage for some explosive development.

Beginning Tuesday night and continuing for many areas into Wednesday night, multiple rounds of rain and thunderstorms are forecast to develop from the Gulf Coast through the Tennessee Valley and into the Ohio Valley.