How Catastrophic Rainfall in the western Carolinas ultimately impacts the Pee Dee and Grand Strand

A catastrophic flooding event is ongoing in the western Carolinas. This rainfall is causing once-in-a-lifetime impacts to the western Carolinas and the southern Appalachians. But, this rain will eventually make it to the Pee Dee and Grand Strand next week or the following week actually. This all has to do with the way our rivers flow. Let's discuss: