A dense fog has settled along the California coastline, significantly reducing visibility and affecting travel conditions. This meteorological event is a result of cool ocean air interacting with warmer inland temperatures, creating a thick layer of moisture. The fog, typical during spring due to increased temperature differences between the ocean and land, is expected to persist through the morning before gradually dissipating. The National Weather Service has issued a fog advisory, advising residents and travelers to exercise caution, use headlights, and maintain safe distances while driving.