The National Weather Service warned of potentially dangerous driving conditions through 10 this morning because of fog.

Forecasters said that visibilities could be reduced to less than a quarter mile, with areas of even thicker fog.

The advisory was in effect for most of the Lowcountry, but was expected to subside with the rising sun.

Otherwise, people in the Charleston area should expect mostly cloudy skies with a high near 70 degrees. Winds will blow from the east at 8 to 15 mph.

The extended forecast calls for morning fog through Sunday:

Tonight: A slight chance of showers after 4am. Areas of dense fog after 2am. Otherwise, mostly cloudy, with a low around 56. East wind 6 to 11 mph. Chance of precipitation is 20%.

Friday: A slight chance of showers before noon. Areas of dense fog before 9am, then Patchy dense fog after 4pm. Otherwise, mostly cloudy, with a high near 72. Northeast wind 6 to 11 mph becoming south in the afternoon. Chance of precipitation is 20%.

Friday night: Patchy fog. Otherwise, mostly cloudy, with a low around 57. South wind 5 to 7 mph becoming calm in the evening.

Saturday: Areas of fog. Otherwise, partly sunny, with a high near 73. Calm wind becoming south 5 to 8 mph in the morning.

Saturday night: Areas of fog. Otherwise, mostly cloudy, with a low around 57.

Sunday: Areas of fog before 10am. Otherwise, partly sunny, with a high near 74.

Sunday night: Mostly cloudy, with a low around 58.

Monday: Mostly sunny, with a high near 73.

Monday night: Mostly cloudy, with a low around 57.

Tuesday: Mostly sunny, with a high near 72.

Tuesday night: Mostly cloudy, with a low around 59.

Wednesday: Mostly cloudy, with a high near 68.

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