Heavy fog blanketed much of the Oklahoma City metro area Sunday night, making driving conditions hazardous.
Fog began even before sunset and got heavier as temperatures dropped, said John Pike, National Weather Service meteorologist.
Pike said the fog extends along Interstate 35 as far north as Perry. It is mostly affecting the northeast part of the state. Visibility was as low as a quarter mile in some places.
“We had clear skies and light winds today,” Pike said. “We've just cooled down to the dew point, and that's showing up as fog.”
The fog is expected to continue through Monday morning, he said.