An upper level will become parked over the South for the next couple of days. That means bands of heavy thunderstorms will develop each day through Wednesday and with the humidity so high, the storms will produce locally heavy rains. Since the storms will be slow movers, some areas can see 1-5 inches of rain in a shot period of time which can lead to flash flooding. Some of the storms will also produce locally strong winds. The HRRR model shows how much rain will fall across the South into the Tennessee Valley. Notice the locally heavy rains with amounts up to 5 inches. It will take until the weekend before the upper level low moves to the coast and produces a coastal storm.