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.

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.

Texas has fluctuated from blizzard conditions to beach weather over the last two weeks, and the pendulum of extremes is set to swing again for parts of the state thanks to an encroaching cold front primed to pass through this weekend.