The advisory is in effect until 9 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 Thursday at 2:11 a.m. a dense fog advisory was issued by the National Weather Service in effect until 7 a.m. for Orange County.

Thick fog on the local level isn't letting up. Winds out of the south are causing trouble for your morning commute. The Dense Fog advisory is in effect till 10 a.m. Thursday morning.

The National Weather Service issued a dense fog advisory at 11:39 p.m. EST on Wednesday in effect until Thursday at 7 a.m. EST for Branch and Hillsdale counties.

Ventura County Beaches, Malibu, Los Angeles County Beaches and Los Angeles County Inland Coast including Downtown Los Angeles are the focus of an updated dense fog advisory issued at 8:48 a.m. on

A Dense Fog Advisory is in effect this morning for several southeast Texas counties, including Fort Bend, Galveston, Brazoria, and Coastal Harris County. The advisory is set to expire at 10 a.m. Thursday morning as foggy conditions cut back visibility to a quarter mile or less in some local areas and surrounding counties.

On Wednesday at 11:30 p.m. the National Weather Service issued a dense fog advisory valid for Thursday between 2 a.m. and 8 a.m. for Mobile and Baldwin counties.

Drivers across Southeast Texas will be facing formidable morning fog all this week as atmospheric moisture encounters fast-warming temperatures.

On Thursday at 6:10 a.m. an updated dense fog advisory was issued by the National Weather Service in effect until 9 a.m. for Orange County.

A dense fog advisory was in effect for much of the Chicago area Thursday morning, with visibility less than a quarter-mile and potentially hazardous driving conditions.