AREAS OF DENSE FOG ACROSS CENTRAL AND SOUTHERN VIRGINIA... Cameras and observations show that areas of dense fog persist across the area early this morning. While visibilities are generally between one half and one mile, they will drop to one quarter mile or less at times. In addition, freezing fog will continue across inland portions of the area. Remain alert for slick spots, especially on secondary roads, bridges, and overpasses. Motorists should be alert for sudden changes in visibility due to the areas of dense fog. Drive at reduced speeds and use low beam headlights only.