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Area Forecast Discussion
Issued by NWS San Francisco Bay Area, CA

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FXUS66 KMTR 230610
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1110 PM PDT WED MAY 22 2013

.DISCUSSION...AS OF 9:00 PM PDT WEDNESDAY...UPPER LEVEL LOW CENTERED
OVER THE PACIFIC NORTHWEST BROUGHT COOL TEMPERATURES TO THE
DISTRICT TODAY. HIGHS TODAY WERE A FEW DEGREES COOLER THAN
YESTERDAY AND 5-10 DEGREES BELOW NORMAL.

THE TROUGH AXIS WILL MOVE THROUGH THE AREA THURSDAY THEN LIFT
NORTHEAST ON FRIDAY. AS A RESULT TEMPERATURES THURSDAY WILL BE
THE COOLEST OF THE WEEK FOLLOWED BY A FEW DEGREES OF WARMING ON
FRIDAY. ANOTHER UPPER TROUGH ROTATING AROUND THE LOW WILL MOVE
THROUGH THE AREA OVER THE WEEKEND. THE AIRMASS WONT BE AS COOL AS
THE CURRENT SYSTEM SO IT WONT BE AS COOL BUT TEMPERATURES WILL
CONTINUE TO RUN BELOW NORMAL.

THE WHOLE LOW PRESSURE SYSTEM WILL BE OUT OF THE AREA BY MONDAY
AND WE SHOULD SEE A LITTLE MORE WARMING. LONG RANGE MODELS
INDICATE ANOTHER UPPER LOW APPROACHING THE PACIFIC NORTHWEST BY
MIDWEEK. THIS SYSTEM COULD BRING LIGHT RAIN INTO NORTHERN
CALIFORNIA AND THERE IS A SLIGHT CHANCE OF SOME RAIN REACHING THE
NORTH BAY AND COASTAL AREAS.

&&

.AVIATION...AS OF 11:10 PM PDT WEDNESDAY...FOR 06Z TAFS. SOME
CLOUDS ARE SHOWING UP ALONG THE SAN MATEO COAST NEAR KHAF AND
AROUND MONTEREY BAY UNDER STIFF ONSHORE WINDS. CIG HEIGHTS ALONG
THE COAST ARE AROUND 1500-2000 FEET. GUSTY WEST WINDS WILL SLOWLY
EASE OVERNIGHT AND NOT EXPECTING CIGS INSIDE THE BAY BUT SOME
PATCHY CLOUDS POSSIBLE BUMPING UP ON THE EAST BAY HILLS.

VICINITY OF KSFO...VFR SKIES. GUSTY WEST WINDS EASING OVERNIGHT THEN
INCREASING AGAIN THURSDAY AFTERNOON.

KSFO BRIDGE APPROACH...VFR. SIMILAR TO KSFO BUT LIGHTER WINDS.

MONTEREY BAY AREA TERMINALS...SCT-BKN CIGS AT 1500-2000 FT
OVERNIGHT THROUGH 16Z THURSDAY...THEN CLEARING. GUSTY WEST WINDS
THRU THE PERIOD.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...PIGEON PT TO PT PINOS 0-10 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...PT ARENA TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...SF BAY UNTIL MIDNIGHT
             SCA...MRY BAY UNTIL MIDNIGHT

&&

$$

PUBLIC FORECAST: W PI
AVIATION/MARINE: RWW

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