If a dense fog advisory is issued for your area, it means that widespread dense fog has developed and visibility often drops to just a quarter-mile or less. These conditions can make driving challenging, so exercise extreme caution on the road, and if possible, consider delaying your trip.

A dense fog advisory was in effect ahead of the Tuesday morning commute in the area of three Southeastern Louisiana lakes, the National Weather Service of New Orleans and Baton Rouge said.  Fog will reduce visibility to less than one nautical mile on Lake Pontchartrain,

A Dense Fog Advisory is in effect for Madison, Morgan, Marshall, Jackson and DeKalb Counties in Alabama until 6 a.m. Tuesday. Freezing fog may limit visibility to one-quarter mile or less. Freezing fog is when there is fog when the air temperature is at or below freezing.