SAN DIEGO (CNS) - A shallow marine layer and weak onshore flow blanketed San Diego County's coastal areas with dense fog early Tuesday, posing a challenge to morning commuters.
Visibility for motorists was at a quarter mile or less at times, according to the National Weather Service, which issued a dense fog advisory for coastal areas until 8 a.m.
The agency cautioned motorists to use their low beams and reduce speeds.
Flight delays out of Lindbergh Field and Palomar Airport are possible, according to the Weather Service.
As of 4 a.m., roughly two dozen flights were canceled or delayed, according to Lindbergh's website. But it was not immediately clear whether the delays and cancellations arose from San Diego's foggy weather or the weather on the East Coast.
Affected airlines were Alaska Airlines, American, Delta, Southwest, United and US Airways.