A Dense Fog Advisory is in effect for much of the region until 10 a.m. Tuesday as widespread fog reduces visibility to less than 1/4 of a mile for Avery, Ashe, Watauaga, Alexander, Burke, Caldwell, Iredell, Lincoln, Catawaba and Rowan counties.
The dense fog has formed due to cold air damming – a weather phenomenon where cool air becomes wedged along the mountains while moist Gulf air streams above. Calm winds overnight, combined with lingering moisture from yesterday’s rain has allowed fog to thicken…