The first wave of the weekend’s weather is already flooding Folly Beach.

“We’re flooding,” Mayor Tim Goodwin said. “I’ve never seen it flood everywhere this fast.”

Goodwin compared the flood waters to the Crosstown at high tide.

At the Sand Dollar Social Club, a board was put up at the front door to keep the rain waters out.

Charleston and Berkeley counties are under a flash flood warning until 5:15 p.m., but the rain could last through the first half of the weekend, the National Weather Service said.

Tropical moisture from the remnants of Chantal and a stalled cold front will combine to cause much of the area’s water woes, Weather Service meteorologist Richard Thacker said.

Heavy rain will drench much of the Charleston area today with an 80 percent chance of showers and thunderstorms this afternoon, the Weather Service said.

“Conditions are ripe for widespread storms across the area, and it’s not really just going to be today,” Thacker said. “A flash flood watch is in effect for much of the region and all of southeast South Carolina today. That certainly could be extended tonight and possibly tomorrow.”

The approaching storm system will bring an increased chance of waterspouts and periods of frequent lighting, according to the Weather Service.

No waterspouts have been reported so far this morning, Thacker said, but conditions are favorable.

“Radar has showed gusty wind over the waters and heavy lightning in the area,” Thacker said.

Highs today will be about 80 with lows in the mid-70s. Winds will reach up to 15 mph, the Weather Service said.

Saturday: Mostly cloudy skies are expected with a 70 percent chance of showers and thunderstorms. Highs will be in the mid 80s with lows about 70. Winds will reach up to 10 mph.

Sunday: Partly sunny skies are expected with a 40 percent chance of showers. Highs will be in the mid 80s with lows about 70. Winds will reach up to 15 mph.