KNOXVILLE-Commuters and early risers found themselves in a fog this morning as a Dense Fog Advisory blanketed swathes of the Southeast. The National Weather Service in Morristown issued the advisory, which remains in effect until 10 a.m. EDT, after visibility was reduced to a quarter mile or less. This foggy curtain descended upon parts of southwest North Carolina, East Tennessee, and southwest Virginia, as reported by the NWS.