Louisiana Dense Fog Advisory Tonight: Visibility Below ¼ Mile Through Monday Morning

NWS warns of visibility dropping below a quarter-mile from late Sunday into Monday morning.

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Lake Charles, LA – A Dense Fog Advisory has been issued for southeast Texas and much of southwest, central, and south-central Louisiana through 9 a.m. Monday, with forecasters warning that visibility could quickly drop below a quarter-mile overnight. The National Weather Service (NWS) in Lake Charles says fog has already begun forming in several areas and is expected to thicken as temperatures cool into the early morning hours.

According to the NWS, dense fog may lead to hazardous driving conditions between late Sunday night and the Monday morning commute. Communities including Lake Charles, Beaumont, Jasper, Jennings, Opelousas, Fort Polk, Alexandria, and Morgan City are all within the advisory zone.

The agency cautions drivers to slow down, increase following distance, and use low-beam headlights rather than high beams, which can worsen glare in fog. Travel delays are possible on major routes such as I-10, US-190, and I-49, especially between 4 a.m. and 8 a.m., when fog density is expected to peak.

In coastal and marshland areas, the combination of light winds and lingering moisture will allow fog to redevelop rapidly in spots that briefly clear. The NWS notes that patchy but dense fog can make visibility unpredictable from mile to mile, creating sudden slowdowns on rural roadways and bridges.

Conditions are expected to gradually improve after sunrise as fog begins to lift and dissipate, though some areas may remain hazy into late morning.

Residents are urged to plan for extra travel time and check road conditions before heading out for school or work.