Sign up for the Morning Brief email newsletter to get weekday updates from The Weather Channel and our meteorologists. S​evere thunderstorms and tornadoes are a threat in the South this weekend as a dangerous threat of flooding rain spreads as far north as the Ohio Valley and central Appalachians.

Back-to-back storm systems will bring the potential for severe weather and flooding to the South over the next several days. Strong thunderstorms could produce damaging winds, large hail and isolated tornadoes,

A flash flood warning remains in effect for Clay, Knott, Leslie, Letcher, Perry and Pike counties until at least 1 p.m. The NWS said storms producing heavy rain have left the area, but excessive runoff from previous rainfall will continue to cause flash flooding of small streams and creeks in low-lying areas.