* WHAT...Visibility lowering to a quarter mile or less in dense fog.
* WHERE...A portion of central California.
* WHEN...From midnight tonight to 10 AM PST Wednesday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Highways impacted include State Routes 33, 41, 43, 99, 140, 145, 152, 168, 180 and 198.