LOS ANGELES (AP) — The National Weather Service has issued a dense fog advisory for a stretch of California coast running from Los Angeles to San Luis Obispo.

Meteorologists say the advisory will be in effect until 9 a.m. Tuesday but note that patchy fog conditions are expected to last through the week.

READ MORE: Irvine Man, 67, Killed In Solo-Vehicle Crash In Tustin

The weather service urges motorists to use caution as visibility will be reduced to a quarter-mile or less at times.

READ MORE: LA To Offer Appointment-Free COVID-19 Vaccines At City-Run Sites

A number of major roadways are likely to be affected including Interstates 105, 110, 405, 605, and 710, and Highways 1, 33, 101, 126, 154 and 246.

The service says the thick fog is the result of a shallow marine inversion.

MORE NEWS: Flower Shortage Drives Up Costs This Mother's Day

(© Copyright 2012 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)