The National Weather Service in New Orleans has issued a Dense Fog Advisory this morning for parts of Southeast Louisiana and Southern Mississippi, with the visibility dropping to one-quarter mile or less in dense fog. Motorists are advised to exercise caution, as the reduced visibility is expected to create hazardous driving conditions until 9 AM CDT. The advisory encompasses wide areas including New Orleans, Baton Rouge, and extends to various other localities such as St. Helena and Washington Parishes, according to the NWS.