CHARLOTTE, N.C. — Dense fog blanketed the Tuesday morning commute in Charlotte and across the Piedmont.
Visibility remained less than a mile overnight and through the morning hours.
Around 1 a.m., visibility at Charlotte's official weather observation station, located at Charlotte Douglas International Airport, observed a visibility of only a tenth of a mile.
Fog forms when the air temperature and the dew point, the measure of condensating moisture in the atmosphere, are within a few degrees of each other. High clouds late Monday helped keep the air temperature in the 40s, also where the dew point was. Combined with calm winds, fog was able to form over the region, where it stayed in place until later Monday morning.
It could take until 11 a.m for things to really clear up, Panovich said.
The worst of the fog was across the Piedmont region of the Carolinas, with less of an issue observed in the higher elevations of the western North Carolina mountains.
WATCH: Vue Cam over Charlotte shows fog setting in.
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