The advisory is in effect until 10 a.m. A dense fog advisory is issued by your local National Weather Service office when widespread dense fog develops. When this happens, visibilities frequently drop to one-quarter of a mile or less. These conditions make travel difficult. Take extra caution when on the road or avoid driving if possible.

On Wednesday at 2:28 a.m. the National Weather Service issued a dense fog advisory in effect until 7 a.m. for Salem, Gloucester, Camden and Burlington counties.

On Wednesday at 2:28 a.m. a dense fog advisory was issued by the National Weather Service in effect until 7 a.m. for Western Chester, Eastern Chester, Western Montgomery, Eastern Montgomery, Upper Bucks and Lower Bucks as well as Delaware and Philadelphia counties.

JACKSONVILLE, Fla. — Just like the month of December started around the First Coast, it'll end with some dense fog around the region. Be prepared for a slow commute as visibility will be down below 1/4 mile. There are some spotty showers scattered around the First Coast for Tuesday morning as well. Fog will be cleared out by 10 a.m.

All of South Florida woke up to a foggy start this New Year’s Eve, with the National Weather Service issuing a dense fog advisory until 10 a.m. READ MORE: New Year’s Eve to ring in with clear skies after dense morning fog. Here’s forecast

The NWS Los Angeles/Oxnard CA issued a dense fog advisory at 5:17 a.m. on Wednesday. Visibility one quarter mile or less in dense fog for Los Angeles County Beaches, Los Angeles County Inland Coast including Downtown Los Angeles,