LOS ANGELES - Dense fog could make driving in Los Angeles and Orange counties dangerous this morning, according to the National Weather Service. Visibility of one-quarter mile or less was expected in parts of Los Angeles County and coastal portions of Orange County, according the weather service, which issued a dense fog advisory expiring at 9 a.m.

Forecasters warned that travel will be hampered by dense fog in and around the Long Beach area to Gardena and West Los Angeles, including Los Angeles International Airport, and in coastal Orange County, especially over higher coastal terrain.

"If driving, slow down, use your headlights and leave plenty of distance ahead of you. Fog can also make road surfaces slick so avoid using excessive speed," the NWS urged in an advisory.

The foggy conditions, typical for the Southland at this time of year, were the result of cool surface temperatures that cause moisture in the air to condense into fog, said Kathy Hoxsie a meteorologist with the National Weather Service in Oxnard. "We also have a weak onshore flow at the moment," she said.

Recent rains have also left moisture that causes the fog to extend farther inland than it otherwise might, Hoxsie said.

Strengthening offshore winds will push the moist air out to sea beginning tonight and that should continue through Friday morning, she said.


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Foggy conditions at LAX could also make for delays in flight arrivals and departures this morning, Hoxsie said.