Drivers in central and east-central Missouri may hit some dense fog during their morning commute. The National Weather Service has issued a Dense Fog Advisory until 9:00 this morning. Counties included in the advisory are: Boone, Audrain, Moniteau, Cole, Osage, Callaway, Montgomery, Gasconade, Franklin, Crawford, Morgan, Miller, Maries, Pulaski, Phelps, Texas, Dent, Randolph, Saline, Howard and Cooper.