The areas affected include…
Charleston Harbor…
Waters from South Santee River to Edisto Beach SC out 20 NM…
Webcams and surface observations show areas of fog have developed
over the Charleston Harbor and nearby Atlantic coastal waters. The
risk for fog will continue for the next few hours with conditions
expected to improve as a cold front pushes offshore. The fog could
become locally dense at times with visibilities 1 NM or less. At 130
AM, the Charleston Harbor Pilot Dispatch reported low visibilities
in the Charleston Harbor.