Fresno, CA – Drivers across central California should prepare for very low visibility this morning as a Dense Fog Advisory remains in effect from 11 p.m. Monday through 11 a.m. PST Tuesday, covering much of the San Joaquin Valley.
According to the National Weather Service (NWS) Hanford, dense fog is expected to develop overnight and persist through the late-morning hours. Visibility may drop to one-quarter mile or less, creating hazardous driving conditions across Merced, Madera, Fresno, Tulare, and Kings counties, including cities such as Fresno, Merced, Visalia, Bakersfield, Hanford, Los Banos, and Porterville.
The advisory highlights widespread impacts along major travel corridors. Highways affected include Interstate 5, along with key California State Routes 99, 33, 41, 43, 46, 59, 152, 165, 168, 180, and 198. Commuters traveling early Tuesday should expect sudden drops in visibility, especially in rural and agricultural areas prone to forming tule fog.
Forecasters warned that fog formation will intensify overnight as winds remain calm and humidity remains high. Conditions are expected to slowly improve late Tuesday morning, but localized pockets of dense fog could linger in low-lying areas.
Drivers are urged to slow down, use low-beam headlights, and leave extra space between vehicles. NWS officials also advise allowing additional time for travel across the region.
