Rain, storms, tides combine for possible flooding in Charleston area

Clouds hover Friday morning over the Ravenel Bridge. (ANDREW KNAPP/STAFF)

Heavy rainfall, thunderstorms and high tides could combine for some flooding Friday as a cold front moves into the Charleston area, the National Weather Service warned.

A coastal flood advisory was in effect for low-lying areas, including downtown Charleston, until noon Friday. High tide will occur in Charleston Harbor around 10 a.m., according to a statement from the Weather Service station in North Charleston.

Shallow saltwater flooding is expected, forecasters said.

“Inundation of saltwater in and near low-lying coastal areas could lead to some road closures and flooding of properties,” they added. “The potential for a combination of salt and fresh water flooding could increase if heavy rain falls around time of high tide.”

Between 1 and 2 inches of rain is possible during the afternoon and evening hours, and another inch could come Saturday, when the temperature will plummet to 49 degrees by noon.

Here is the extended forecast:

Friday: Rain, with thunderstorms also possible after 4 p.m. Some of the storms could produce heavy rainfall. High near 64. Northeast wind 10 to 14 mph becoming southeast in the afternoon. Chance of precipitation is 100 percent. New rainfall amounts between a half and three quarters of an inch possible.

Friday night: Periods of rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Steady temperature around 64. Breezy, with a southwest wind 20 to 24 mph, with gusts as high as 37 mph. Chance of precipitation is 100 percent. New rainfall amounts between three quarters and one inch possible.

Saturday: Periods of rain, mainly before 1 p.m. Some of the storms could produce heavy rainfall. Temperature falling to around 49 by noon. Breezy, with a west wind 14 to 21 mph. Chance of precipitation is 80 percent. New rainfall amounts between a quarter and half of an inch possible.

Saturday night: Mostly clear, with a low around 39. West wind 7 to 14 mph.

Sunday: Sunny, with a high near 56. West wind 6 to 8 mph.

Sunday night: Partly cloudy, with a low around 44.

Monday: Mostly sunny, with a high near 56.

Monday night: Partly cloudy, with a low around 36.

Tuesday: Sunny, with a high near 50.

Tuesday night: Mostly clear, with a low around 33.

Wednesday: Sunny, with a high near 51.

Wednesday night: Mostly clear, with a low around 34.

Thursday: Sunny, with a high near 55.

Reach Andrew Knapp at 937-5414 or twitter.com/offlede.