In addition to very heavy rain and lightning, the main threats with this storm are damaging straight line winds in excess of 60 mph and hail up to quarter size.
The National Weather Service has issued a a flash flood warning remains in effect until 6:15 pm for central Charleston County.
At 5:02 pm National Weather Service doppler radar continued to indicate showers and thunderstorms producing heavy rain located along a line extending from Isle of Palms to Ravenel or along a line extending from Mount Pleasant to 14 miles southwest of Middleton Place moving east at 10 mph.
As much as 2 to 4 inches of rainfall has already occurred in the warned area and has resulted in flash flooding. An additional 1 to 2 inches of rain is possible through 615 pm and will worsen the flooding conditions especially in downtown Charleston.
Law enforcement and reports from social media indicate many flooded roadways in parts of downtown Charleston, West Ashley, North Charleston and Mount Pleasant.
Many vehicles have become stranded in flood waters. This is a potentially dangerous situation.
Flash flooding is expected in and around downtown Charleston, Hollywood, James Island, Johns Island, Meggett, Mount Pleasant, Ravenel, Sullivans Island, Wadmalaw Island, West Ashley, Charles Towne Landing and Isle of Palms.