The National Weather Service in Fort Worth issued a dense fog advisory Wednesday morning. All North Texas counties — including Dallas, Denton, Collin, Ellis and Tarrant — were under the advisory, which expired at 10 a.

On Wednesday at 12:12 a.m. the NWS Fort Worth TX issued a dense fog advisory in effect until 10 a.m. The advisory is for Cooke, Grayson, Fannin, Lamar, Denton, Collin, Hunt, Delta, Hopkins, Tarrant, Dallas,

Following a foggy Wednesday morning, visibility continued to improve as a warm front lifted north. Visibility was down to a quarter mile at times during the Wednesday morning commute while temperatures hovered in the 40s ahead of the warm front.