JACKSONVILLE, Fla -- Areas of fog -- locally dense -- will develop overnight. Be prepared to slow down and allow for extra travel time through the morning commute. Otherwise skies will be partly cloudy with lows in the 50s. Unseasonably mild temperatures will continue Friday. Early morning fog will burn off allowing the sun to push temperatures into the 70s in the afternoon. Highs close to 80 degrees will be near record warmth over the weekend.