Turbulent weather in Beaufort County is related to Hurricane Isaac, according to the National Weather Service in Charleston.

While showers and thunderstorms are expected through Thursday, residents shouldn't be concerned about waterspouts off coast, the NWS said, though a moderate risk of rip currents remains throughout the week.

In Charleston, waterspouts and more flooding are predicted for today. Torrential rains flooded streets Tuesday in the city and surrounding areas. The weather service reported that some areas received as much as 8 inches of rain unrelated to Hurricane Isaac.

Emergency officials reported at least 20 stranded vehicles downtown, where crews had to help motorists out of cars. Some businesses and homes also reported flooding.