I would imagine they're still nailing down the area that will be the highest threat. Right now the I-85 corridor, from Atlanta to Charlotte, is looking to be the highest threat and should be in the enhanced tomorrow. A wide region has 40-50kt sustained winds at 925mb, which wouldn't have trouble mixing to the surface. As for tornadoes, it seems hodographs are showing somewhat more unidirectional shear than optimal (more hockey stick shaped than curved), but I could be wrong.