Dense Fog Advisory issued December 22 at 2:18AM PST until December 22 at 10:00AM PST by NWS San Diego CA

* WHAT…Visibility one quarter mile or less in dense fog.

* WHERE…Orange County Coastal Areas, Orange County Inland Areas,
San Bernardino and Riverside County Valleys-The Inland Empire, San
Diego County Coastal Areas, and San Diego County Valleys. The
lowest visibilities will be near higher coastal terrain into the
western valleys.

* WHEN…Until 10 AM PST this morning.

* IMPACTS…Low visibility could make driving conditions hazardous.
If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.