Hattiesburg, MS – Multiple National Weather Service offices across the Deep South have issued Dense Fog Advisories for portions of Mississippi, Alabama, and Louisiana, where visibility may fall to one-quarter mile or less through mid-morning Tuesday. The widespread fog event spans a broad corridor from Hattiesburg and Columbia to Mobile, Gulfport, Pascagoula, and inland communities including Lucedale, Leakesville, and Wiggins.
According to NWS Jackson, dense fog is already forming across Marion, Lamar, and Forrest counties in south-central Mississippi, with visibility expected to remain very low until 9 a.m. Tuesday. This includes the Hattiesburg metro and surrounding areas such as Purvis and Lumberton.
Farther southeast, NWS Mobile has issued a similar advisory until 8 a.m. Tuesday for inland, central, and coastal Mobile County in Alabama, as well as portions of southeast Mississippi including Perry, George, Greene, and Stone counties. Fog is likely to worsen overnight, spreading inland from the coast as temperatures and dew points remain close together.
NWS New Orleans reports dense fog will persist until 9 a.m. Tuesday across the Mississippi Coast and Pearl River region, including Biloxi, Gulfport, Pascagoula, Picayune, Bay St. Louis, Long Beach, and Waveland. Forecasters warn that both coastal and inland sections could see equally dangerous visibility reductions.
The primary impact across all three states will be hazardous driving conditions, especially along major corridors such as I-59, I-10, US-49, US-98, Highway 90, and numerous rural routes known for naturally forming fog pockets.
Drivers are urged to slow down, use low-beam headlights, avoid sudden braking, and increase following distance. Conditions will gradually improve by late morning as fog lifts and visibility increases.
