* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Caruthers - San Joaquin - Selma, Delano-Wasco-Shafter, Fresno-Clovis, Hanford - Corcoran - Lemoore, Merced - Madera - Mendota, Planada - Le Grand - Snelling, Southeast San Joaquin Valley, Visalia - Porterville - Reedley, and West Side of Fresno and Kings Counties. * WHEN...From midnight tonight to 10 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Highways affected include (but are not limited to): 41, 43, 99, 152, 168, 180, and 198.