Dense Fog Advisory issued until 9 am this morning

SAN DIEGO-SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- Fog shrouded the inland valleys of San Diego County early today.

The National Weather Service scheduled a dense fog advisory for the inland valleys until 9 a.m., saying visibility was a quarter-mile or less in parts of Spring Valley, La Mesa, Rancho Bernardo and Escondido.

''If driving, slow down, use low beam headlights and leave plenty of distance ahead of you,'' an NWS advisory said....