There will be a strong cold front moving in from our west on Sunday. This front will bring swirling winds ahead of it which could touch off some rotating thunderstorms, and we know what the result of that is.
A secondary wave of low pressure forms on the front and translates north on Sunday, which could be the disturbance that causes the storms to rotate across NC/SC and even VA.
Winds at 5,000 feet are expected to be around 55 knots or about 62 mph. This is enough momentum to cause rotating thunderstorms.
SPC has an enhanced risk down along the Gulf Coast for Day 3. Day 4 which is Sunday, we should see the enhanced risk push east.
Monitor your local news network and NWS office for watches and warnings, and take those as official alerts.