 It has developed and become very thick this morning, a little less dense now than it was like a half an hour ago, but it's still pretty nasty out there as far as visibility goes. So use caution if you're on the roads this morning. Be alert for rapid changes in visibility. Use your low beams and make sure you leave a little extra distance between you and the vehicle you are following. The fog should dissipate over the next couple of hours, according to the National Weather Service.