Cincinnati, OH – Fog continues to expand across southern Ohio, northern Kentucky, and eastern Indiana early Wednesday, with forecasters warning that visibility may drop to one-quarter mile or less in some areas through mid-morning.
According to the National Weather Service offices in Wilmington and Louisville, patchy dense fog has developed across a broad multi-state region, affecting communities from Richmond and Madison in Indiana to Lexington, Louisville, Cincinnati, Dayton, Columbus, and surrounding counties in Ohio and Kentucky. Drizzle in portions of Kentucky may further degrade visibility on roadways.
Forecasters say the fog will remain highly variable overnight, with sudden drops in visibility possible along major corridors including I-71, I-75, I-64, I-70, and multiple state routes. Low-lying areas, river valleys, and rural stretches such as the Ohio River corridor, Licking River basin, and Scioto River valley are expected to experience the densest fog.
According to the NWS, the combination of lingering low clouds, light winds, and saturated ground is likely to cause slow improvement after sunrise. Fog may persist through late morning in shaded areas, wooded terrain, or near farmland where moisture remains trapped at the surface.
Some locations may experience brief pockets of dense drizzle, especially across central Kentucky, which could further reduce visibility for early drivers.
Motorists traveling between major metro areas—including Cincinnati, Columbus, Dayton, Lexington, Louisville, and Bowling Green—should plan for delays and take extra precautions. Drivers are urged to use low-beam headlights, slow down, and leave additional distance between vehicles.
Fog is expected to gradually lift through mid- to late-morning Wednesday as temperatures rise.
