Knoxville woke today to a blanket of dense fog, with visibility dropping to a mere quarter of a mile, highlighting the atmospheric drama that often unfolds silently above our heads. By the time the sun clambered over the Smokies, the fog started its retreat, giving way to clear skies. According to the latest update from the National Weather Service in Knoxville, the fog lifted by 6:15 am EDT, setting the stage for a day that would later unspool into sunny warmth, offering a high near 79 degrees.