If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM EST FRIDAY... * WHAT...Visibility less than one quarter mile in dense fog. * WHERE...In New York, Yates, Steuben, Schuyler, Chemung, Tompkins, Cortland, Chenango, Otsego, Tioga, Broome, Delaware and Sullivan counties. In Pennsylvania, Bradford, Susquehanna, Northern Wayne, Wyoming, Lackawanna, Luzerne, Pike and Southern Wayne counties. * WHEN...Until 9 AM EST Friday. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...The lowest visibility will be across the higher elevations. There could be some minor improvement in visibilities this afternoon, before the fog settles back in this evening and overnight.