This combination plus additional atmospheric forcing will set the stage for storm development beginning late afternoon, Thursday. Initially developing across the Bootheel of Missouri and northeast Arkansas and explode further and form a line as they cross over the Mississippi River into Tennessee, Kentucky and Mississippi.
The linear nature of the storms will lead to more of a threat of damaging winds and large hail; however, a few individual supercell storms are possible, initially ahead of the main line. These would be the storms of concern for possible tornadic development.
Overall, the highest threat for severe weather will be from northern Alabama into eastern Tennessee and eastward into Georgia and the Carolinas. The window for arrival in these locations is from about 8 pm in the Tennessee Valley to the early morning hours in the western Carolinas. The severe weather threat will continue through Friday for the Eastern Carolinas southward into Florida.