408 FPUS76 KMTR 211356 NOWMTR SHORT TERM FORECAST NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 556 AM PST SAT NOV 21 2009 CAZ506-211700- NORTH BAY INTERIOR VALLEYS- 556 AM PST SAT NOV 21 2009 .NOW...AREAS OF FREEZING FOG HAVE DEVELOPED IN THE SANTA ROSA AREA. FOG HAS BEEN LOCALLY DENSE...WITH VISIBILITIES AS LOW AS ONE QUARTER MILE AT TIMES. DRIVERS SHOULD EXERCISE CAUTION WHEN DRIVING DUE TO LOW VISIBILITIES AND VERY SLICK ROADWAYS. FOG SHOULD BEGIN TO DISSIPATE BY MID MORNING. $$ MHS