Fog Creeps In to Stay for the Weekend

A blanket of night and morning fog will move inland during the weekend, making driving hazardous at times before it lifts Sunday.

The dense fog, caused by a weak onshore flow of marine air, caused delays and cancellations of flights from Lindbergh Field during the morning and evening Thursday, spokesmen for PSA said.

At least four flights from Lindbergh were canceled, and delays plagued the system along the West Coast, airline employees said. Thursday night, conditions were considered “marginal” for takeoffs and landings at Lindbergh, reservation agent Chuck Brown said.

The fog, which started to develop Wednesday, was expected to move into inland valleys today, said Harvey Hastrup, forecaster for the National Weather Service at Lindbergh Field. Driving in many places both on the coast and inland could be hazardous until mid-morning, Hastrup said.

By Saturday, the bases of coastal mountains could be blanketed in dense fog. But coastal areas will have only light fog and low clouds, Hastrup said.

During the day, hazy sunshine and mild temperatures will follow the fog on the coast and in the valleys, with only partial clearing at the beach through Saturday.

Temperatures should reach a high of 67 and fall to a low of 55 on the coast both today and Saturday. Inland areas will reach a high of 79 and a low of 51 both days.