* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Much of northern and central Louisiana and deep east Texas, including segments of I-20 and I-49 from Lufkin and Toledo Bend Country and portions of Central Louisiana, up to Shreveport and Monroe.
* WHEN...From 3 AM to 9 AM CST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.