A potentially dangerous tornado outbreak threatens a region covering around 25 million people across the Deep South on Friday, with strong thunderstorms that could spawn intense tornadoes, damaging winds and large hail. Meanwhile, the potential for flash flooding extends into the Ohio Valley. The threat is particularly high in the lower Mississippi Valley – where supercells will be capable of producing EF-2 or stronger tornadoes, damaging wind gusts and large hail. “Favorable wind shear is all going to come together across the Southeast … where we again continue to track this threat of severe weather throughout the day on Friday,”...