947 AM PST Tue Jan 30 2018 Central Sacramento Valley-Southern Sacramento Valley- Carquinez Strait and Delta-Northern San Joaquin Valley- Clear Lake/Southern Lake County- Including the cities of Chico, Oroville, Marysville/Yuba City, Sacramento, Fairfield/Suisun, Stockton, Modesto, and Lakeport 947 AM PST Tue Jan 30 2018 .NOW... POCKETS OF LOCALLY DENSE FOG THIS MORNING BEFORE GRADUALLY CLEARING LATE THIS MORNING. MOTORISTS MAY ENCOUNTER LOCAL HIGHWAY VISIBILITIES OF LESS THAN A QUARTER MILE AT TIMES IN PORTIONS OF THE VALLEY. USE CAUTION AND SLOW DOWN WHEN ENCOUNTERING DENSE FOG. AREAS THAT MAY BE AFFECTED INCLUDE INTERSTATE 80 FROM NEAR VALLEJO TO SACRAMENTO, INTERSTATE 5 AND HIGHWAY 99 FROM MARYSVILLE TO TURLOCK, THE SACRAMENTO METROPOLITAN AREA, AND THE CLEAR LAKE REGION.