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Thick Fog Slowing Down San Diego County Commuters

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A shallow marine layer is causing low visibility Tuesday morning for commuters in San Diego County.

The National Weather Service says a dense fog advisory is in effect until 9 a.m. for coastal areas and the western valleys. Visibility is less than a quarter mile in some parts. Motorists are advised to slow down and to use their low beam headlights.

Beach areas Tuesday morning are also subject to morning high tides topped by large waves.

The weather service says this could lead to some minor beach flooding Tuesday and Wednesday along the county's shoreline. The high tide is expected to reach up to 7 feet in La Jolla Tuesday morning with possible flooding at beach parking lots and nearby streets in La Jolla, Oceanside, Carlsbad, Cardiff-by-the-Sea and Imperial Beach. The high tide will lower to 6.7 feet on Wednesday.

On top of those tides, waves are expected to be 4 to 6 feet with local sets of 7 feet, according to the forecast.

The weather service is also calling for mild temperatures, which are expected to return to the high 70s and 80s over the upcoming weekend.