RALEIGH — Fog on Wednesday morning slowed smart drivers, and they may face spots of black ice Thursday because of overnight rain and perhaps snow flurries and dropping temperatures, the National Weather Service said.
A dense fog advisory was in effect through 10 a.m. throughout the Triangle.
Visibility was down to a few hundred feet at times, though conditions varied widely.
Wednesday night, forecasters said to expect arctic air which to weather professionals means temperatures colder than a cold front but not polar like what affected the Triangle last week.
That cold air will mix with wet air in place to create rain showers between midnight and 3 a.m., the weather service said, and light snow is possible.
There will be little to no accumulation, forecasters said, because the ground is warm, but temperatures will fall into the 20s, and that could produce black ice.