Patchy fog and freezing fog, some of which could be locally dense, will develop and persist overnight as abundant moisture at the surface along with cooling temperatures and light winds persist. In areas where temperatures are below freezing, this may create slick roadways. Also, black ice may form from the refreezing of melted snow from Monday's above freezing temperatures. Motorists are urged to use caution in case of sudden drops in visibility due to fog and beware of the possibility of black ice on roadways.