071
FXUS66 KMTR 072350
AFDMTR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA CA
450 PM PST SAT NOV 7 2009
DISCUSSION...AS OF 2:42 PM PST SATURDAY
VISIBLE SATELLITE IMAGERY
SHOWS SUNNY SKIES ACROSS THE DISTRICT THIS AFTERNOON AND
TEMPERATURES ARE RUNNING IN THE 60S MOST AREAS. WITH A CONTINUED
BROAD UPPER TROUGH/ZONAL FLOW ALOFT...EXPECT LITTLE CHANGE IN THE
TEMPERATURES ON SUNDAY. SLIGHT COOLING CAN BE ANTICIPATED EARLY IN
THE WEEK AS THE TAIL EDGE OF AN UPPER TROUGH BRUSHES THE STATE. THERE
COULD ALSO BE PRECIPITATION CHANCES ACROSS THE DISTRICT AT TIMES
TUESDAY THROUGH THURSDAY AS SEVERAL IMPULSES MOVE THROUGH THE FLOW
ALOFT AND AFFECTING THE STATE.
THE IMMEDIATE WEATHER HAZARD CONTINUES TO BE THE LARGE NORTHWEST
SWELL IMPACTING THE CALIFORNIA COASTLINE. CURRENT BUOY REPORTS
INDICATE SWELL HEIGHTS RANGING FROM 15 TO 18 FEET OVER OUR COASTAL
WATERS. THUS...THE HIGH SURF ADVISORY REMAINS IN EFFECT THROUGH
SUNDAY FOR OUR COASTAL AREAS.
AVIATION...AS OF 4:50 PM PST SATURDAY
VFR CONDITIONS THIS EVENING
WITH CLEAR SKIES. STRONG NORTHERLY GRADIENT DOWN THE COAST WITH
AROUND 4 MB FROM ACV-SFO THEN 7 MB FROM SFO-SBA WITH LIGHT ONSHORE
GRADIENTS. THIS PATTERN SHOULD PRECLUDE MUCH IN THE WAY OF LOW
CLOUDS AND FOG OVERNIGHT AT MOST TERMINALS. CURRENT PROFILER DATA
SHOWS COOLING ALOFT WITH NO DISTINCT INVERSION. ANY INVERSIONS
TONIGHT WILL BE RADIATIVE AND IN THE VALLEYS. WINDS WILL CONTINUE TO
EASE AFTER SUNSET. EXPECT VFR FOR BAY AREA TERMINALS TO START SUNDAY
AND THROUGH THE DAYLIGHT HOURS.
VICINITY OF KSFO...VFR CONDITIONS THROUGH SUNDAY. EVENING WINDS
TO 15 KT WITH GUSTS TO 20 KT WILL EASE AFTER 03-04Z. CLEAR SKIES
EXPECTED TO START THE DAY SUNDAY.
KSFO BRIDGE APPROACH...VFR CONDITIONS THROUGH SUNDAY.
MONTEREY BAY TERMINALS...VFR THIS EVENING. NW WINDS OVER THE OCEAN
COULD BRING SOME LOCAL CIGS INTO KMRY OVERNIGHT BUT CONFIDENCE ON
THAT IS LOW. IF THEY DO COME IN IT SHOULD BE LATE NIGHT/EARLY
MORNING AND ANY CIGS ON SUNDAY MORNING WILL MIX OUT QUICKLY.
MARINE...AS OF 3:00 PM PST SATURDAY
LARGE NORTHWEST SWELL
CONTINUES ALONG THE COAST. AT 2 PM HALF MOON BAY BUOY REPORTED 21
FOOT SEAS. SWELLS IN THE 15 TO 18 FOOT RANGE WITH A 16 SECONDS PERIOD
WILL CONTINUE THROUGH TONIGHT. MODERATE WINDS WILL ADD ANOTHER FOOT
OR TWO TO THE COMBINED SEAS. SWELLS WILL START TO SLOWLY DECREASE
ON SUNDAY. HIGH SURF ADVISORY CONTINUES THROUGH SUNDAY AFTERNOON.
MTR WATCHES/WARNINGS/ADVISORIES
.TNGT...SCA FOR WINDS AND SEAS...PT. ARENA TO PT. PIEDRAS
BLANCAS
...SCA FOR HAZARDOUS SEAS...MRY BAY
...ROUGH BAR FOR SAN FRANCISCO BAR
.THRU SUN AFTERNOON...HIGH SURF ADVISORY...SONOMA COAST SOUTH
THROUGH THE MONTEREY COUNTY COAST.
PUBLIC FORECAST: SSA
AVIATION/MARINE: RWW
NWS ON THE WEB AT WEATHER.GOV/SANFRANCISCO
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