FXUS66 KMTR 290557
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA CA
955 PM PST SAT NOV 28 2009

.DISCUSSION...AS OF 7:45 PM SATURDAY...AREA WINDS HAVE BEEN SLOWLY
DIMINISHING THROUGH THE EVENING ACCORDING TO AREA OBSERVATIONS.
LOCALLY GUSTY WINDS STILL CONTINUE IN THE HIGHER TERRAIN. A WIND
ADVISORY REMAINS VALID UNTIL 10 AM PST SUNDAY FOR THE NORTH AND EAST
BAY AREA HILLS ABOVE 1000 FEET. OFFSHORE PRESSURE GRADIENTS FROM WMC-
SFO ARE FORECAST TO CLIMB TO 12-15 MB BY SUNDAY MORNING. A STEEP
GRADIENT LIKE THIS COULD CAUSE WINDS TO CLIMB BACK UP A BIT OVERNIGHT
BUT MOSTLY IN THE HIGHER TERRAIN WHERE WINDS OFTEN STAY CONNECTED TO
THE LOW LEVEL WINDS. AT THE SURFACE WINDS QUITE OFTEN DECOUPLE FROM
LOW LEVEL WINDS AS NIGHT-TIME STABILITY SETS IN. ON SUNDAY ALL
PRESSURE GRADIENTS ARE FORECAST TO DIMINISH SO WIND SPEEDS EVERYWHERE
WILL BE LOWER.

HIGH PRESSURE WILL BUILD IN OVER THE AREA TONIGHT AND SUNDAY. THE
AIRMASS IS VERY DRY AND THE BOTTOM HAS DROPPED OUT ON DEWPOINT
TEMPERATURES WITH READINGS PRESENTLY IN THE UPPER TEENS AND
TWENTIES. AS A RESULT CLEAR SKIES WILL CONTINUE TONIGHT...SUNDAY AND
MOST LIKELY THROUGH EARLY WEEK. HIGH PRESSURE IS EXPECTED TO COVER
THE AREA THROUGH MID TO POSSIBLY LATE WEEK BEFORE WEAKENING.

NO UPDATES ARE EXPECTED TONIGHT.

&&

.AVIATION...AS OF 9:55 PM PST SATURDAY...VFR CONDITIONS WILL CONTINUE
ACROSS ALL TERMINAL TONIGHT. WIND WILL REMAIN THE MAIN ISSUE THROUGH
TONIGHT AS STRONG WINDS...JUST ABOVE THE SURFACE...CONTINUE AROUND
THE BAY AREA. THIS WILL CAUSE IN BOTH DIRECTIONAL AND SPEED SHEAR
WITHIN 2000 FEET OF THE SURFACE UNTIL 12Z SATURDAY MORNING.

VICINITY OF KSFO...VFR CONDITIONS WILL PREVAIL THROUGH TONIGHT.
LOW LEVEL WIND SHEAR AND TURBULENCE UNTIL 12Z DUE TO GUSTY N TO
NE WINDS OF 30-40KT AT 2000 FEET.

KSFO BRIDGE APPROACH...SAME AS KSFO.

MRY BAY AREA TERMINALS...VFR CONDITIONS WILL PREVAIL THROUGH
TONIGHT WITH GUSTY SURFACE WINDS.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
    .TNGT...SCA...PT ARENA TO PT PIEDRAS BLANCAS 10-60 NM
                           AND SF BAY TIL 3 AM SUNDAY
         ...SCA FOR ROUGH BAR...SF BAR TIL MIDNIGHT
         ...WIND ADVISORY NORTH AND EAST BAY HILLS TIL 10 AM SUNDAY

$$

PUBLIC FORECAST: CANEPA
AVIATION/MARINE: CW

NWS ON THE WEB AT WEATHER.GOV/SANFRANCISCO