Graphic reads: Dense Fog THU AM - Land and Marine Areas, Dense Fog Advisory in effect for all of SE LA and S MS including coastal waters., What To Expect: Areas of dense fog with visibilities below a quarter mile both on land and on water. Super fog from ag fields burning especially north and west of Baton Rouge could bring visibilities down to near zero in localized areas., When: Land: Midnight Tonight to 9AM Thursday Marine: Midnight tonight through Noon Thursday, Safety: Slow down & increase following distance; use low-beam headlights Consider delaying travel Mariners should navigate with caution.