SAN DIEGO - Dense fog was expected to shroud San Diego County's mountains on Sunday, while clouds and a chance of rain were forecast along the coast and in the valleys, forecasters said.
10News meteorologist Dave Spahr said drizzle, mist and fog were expected across the county with a few patches of light rain.
Cloudy, moist conditions over the region were expected to continue through Sunday evening, as a low pressure through approached from the northwest, according to the National Weather Service.
"Clouds, drizzle, fog and occasional showers will be the rule for west of the mountains, while gusty westerly winds bring drier air into the deserts," the weather service reported.
Areas of dense fog were expected to develop in the mountains as a very moist air mass pressed up against the coastal slopes, according to NWS meteorologists, who issued a dense fog advisory that was set to extend until 10 p.m. The fog could cause visibility problems for drivers on the Interstate 8 and 15.
"A dense fog advisory means visibility will frequently be reduced to less than one quarter-mile," the advisory stated. "Motorists should use low beam headlights and be prepared for sudden drops in visibility. Allow extra time to reach your destination."
Fair and cool weather was expected Monday followed by warmer, drier conditions for the rest of the week as a ridge of high pressure over the Pacific Ocean expands east over the state, forecasters said.