A report was issued from the National Weather Service on Wednesday at 9:29 p.m. for dense fog until Thursday at 5 a.m. for Northern Clinton, Northern Centre, Southern Centre, Northern Lycoming, Southern Clinton and Southern Lycoming as well as Elk, Cameron, Clearfield, Cambria, Blair, Huntingdon, Mifflin, Juniata, Somerset, Bedford, Fulton, Franklin, Sullivan, Union, Snyder, Montour, Northumberland, Columbia, Perry, Dauphin, Schuylkill, Lebanon, Cumberland, Adams, York and Lancaster counties.

"Locally dense fog will reduce visibility to a quarter mile or less in spots through the night. At the same time, many locations are near or even below the freezing mark. This may lead to slick spots on roads, especially bridges and overpasses, and on sidewalks. If traveling, be prepared for changes

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