Dense Fog in California, August 27, 2001

EXTREME SOUTHWESTERN CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
830 PM PDT SUN AUG 26 2001

                             ...SYNOPSIS...
HIGH PRESSURE ALOFT WILL CONTINUE THROUGH MONDAY...THEN IT WILL
GRADUALLY WEAKEN FOR A FEW DAYS. THEREFORE...TEMPERATURES PEAKING
TODAY AND MONDAY WILL LOWER A FEW DEGREES EACH DAY STARTING TUESDAY.
A STRONG MARINE INVERSION WILL CONTINUE NIGHT AND MORNING LOW CLOUDS
AND FOG NEAR THE COAST...LINGERING AT THE BEACHES DURING THE
AFTERNOONS.

                            ...DISCUSSION...
STRATUS/FOG REMAINED ON THE COAST THROUGH THE AFTERNOON AND IS
BEGINNING TO SPREAD INTO THE COASTAL VALLEYS AND SOME OF THE MESAS.
STRATUS IS QUITE LOW SO CAN NOT RULE OUT THE POSSIBILITY OF A DENSE
FOG ADVISORY LATER THIS EVENING.  00Z NKX SOUNDING NOT MUCH
DIFFERENT FROM SATURDAY AFTERNOON.

ALREADY DID A ZONE UPDATE EARLIER THIS AFTERNOON FOR THE ORANGE
COUNTY COASTAL PLAINS TO TWEAK UP THE AFTERNOON TEMPERATURE FOR THE
WELL INLAND AREAS FOR MONDAY. ANAHEIM HAD A HIGH TEMPERATURE TODAY
OF 89 DEGREES AND THE 3 PM TEMPERATURE FROM THE AWOS AT THE CORONA
MUNICIPAL AIRPORT JUST EAST OF PRADO DAM AREA IN RIVERSIDE COUNTY
SHOWED A TEMPERATURE OF 93 DEGREES WHICH WOULD INDICATE THE INLAND
ORANGE COUNTY AREAS SUCH AS YORBA LINDA MAY HAVE REACHED THE LOW
90S.

00Z ETA AND NGM CONTINUE WITH THE RIDGE OVER THE SOUTHWEST WITH THE
RIDGE AXIS RETROGRADING TO NEAR 130W BY 48 HOURS. POSITION OF THE
RIDGE WILL KEEP SOUTHERN CALIFORNIA DRY THROUGH THE PERIOD WITH A
NORTHWESTERLY FLOW TOWARDS THE END OF THE PERIOD. SOME MINOR
DEEPENING OF THE MARINE LAYER TOWARDS THE END OF THE PERIOD AS THE
RIDGE MOVES FURTHER WEST BUT INLAND AREAS SHOULD REMAIN FAIRLY WARM
TO HOT. PATTERN IS NOT FAVORABLE FOR ANY SUBTROPICAL MOISTURE TO
MOVE INTO THE AREA AT LEAST THROUGH TUESDAY.

NO FURTHER UPDATES ARE PLANNED UNLESS A DENSE FOG ADVISORY IS ISSUED.

.SAN...NONE.

HORTON