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

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000
FXUS66 KMTR 020536
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1036 PM PDT TUE SEP 1 2015

.SYNOPSIS...ASIDE FROM THE POSSIBILITY OF COASTAL DRIZZLE TONIGHT
INTO WEDNESDAY MORNING...DRY WEATHER CONDITIONS WILL PERSIST
THROUGH THE UPCOMING WEEKEND. TEMPERATURES WILL COOL THROUGH LATE
WEEK AS AN UPPER LEVEL TROUGH DIGS SOUTHWARD INTO THE PACIFIC
NORTHWEST. WARMER AND DRIER CONDITIONS RETURN FOR THE UPCOMING
WEEKEND.

&&

.DISCUSSION...AS OF 8:44 PM PDT TUESDAY...ANOTHER MILD EVENING
ANTICIPATED TONIGHT WITH TEMPERATURES CURRENTLY RUNNING IN THE
LOWER TO MID 60S ALONG THE COAST TO MID 70S INLAND. SATELLITE
IMAGERY SHOWS A STRIP OF STRATUS ALONG THE COAST EXTENDING SOUTH
FROM HALF MOON BAY. PATCHY STRATUS IS ANTICIPATED ONCE AGAIN
TONIGHT WITH LOCALIZED DRIZZLE IN RESPONSE TO AN APPROACHING UPPER
LEVEL DISTURBANCE THAT IS EXPECTED TO FURTHER DEEPEN THE MARINE
LAYER.

COOLER TEMPERATURES ARE IN STORE WEDNESDAY AS THE WEAK UPPER LEVEL
SHORT WAVE SWINGS ACROSS THE REGION. THE COOLING TREND WILL
CONTINUE THROUGH THE LATER HALF OF THE WEEK AS THE LONGWAVE
TROUGH DIGS SOUTH OVER THE PACIFIC NORTHWEST INTO NORTHERN
CALIFORNIA INTRODUCING A COOLER AIRMASS ACROSS THE NORTHERN HALF
OF THE STATE. 850 MB TEMP AND 500 MB HEIGHTS WILL PLUMMET THROUGH
THE END OF THE WEEK REACHING A LOW OF 8.5 C AND 269 DAM FRIDAY
NIGHT. THIS WILL TRANSLATE INTO HIGHS IN THE 60S ALONG THE COAST
AND 70S INLAND WITH LOWS IN THE 50S OVER LOW LYING AREAS AND 40S
OVER HIGHER ELEVATIONS.

THIS SYSTEM IS FORECAST TO KICK OUT TO THE NORTHEAST ON SATURDAY
AND WILL BE REPLACED BY AN AREA OF HIGH PRESSURE BUILDING IN FROM
THE WEST. THIS WILL KICK START A WARMING TREND THAT IS FITTING
OF THE LABOR DAY WEEKEND. FURTHER WARMING IS ANTICIPATED SUNDAY
AND MONDAY AS A THERMAL TROUGH SETS UP OVER THE STATE THEN SHIFTS
WEST OVER THE COAST. WARM AND DRY CONDITIONS WILL PERSIST THROUGH
EARLY NEXT WEEK WITH NO RAIN IN THE FORECAST THROUGH NEXT WEEK.

FORECAST APPEARS ON TRACK...NO UPDATE NEED AT THIS TIME.

&&

.AVIATION...AS OF 10:20 PM PDT TUESDAY...COASTAL STRATUS AND FOG
WILL CONTINUE TO DEVELOP OVERNIGHT INTO WEDNESDAY MORNING WITH
PATCHY COASTAL DRIZZLE POSSIBLE. A LOW LEVEL TROUGH WILL SLIDE
SOUTH OVER THE COASTAL WATERS WEDNESDAY.

VICINITY OF KSFO...VFR. MVFR CIGS FORECAST 12Z-16Z. GUSTY WESTERLY
WINDS LIKELY WEDNESDAY AFTERNOON AND EVENING.

KSFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...MVFR CIGS GRADUALLY TRENDING TO IFR
CIGS OVERNIGHT. PARTIAL CLEARING BY WED AFTERNOON.

&&

.MARINE...AS OF 8:51 PM PDT TUESDAY...GUSTY NORTHWEST WINDS WILL
CONTINUE OVER THE NORTHERN OUTER WATERS TONIGHT. A TROUGH OF LOW
PRESSURE OVER THE EASTERN PACIFIC WILL SLIDE SOUTH OVER THE
COASTAL WATERS WEDNESDAY. LOW CLOUDS WILL CONTINUE TO DEVELOP
OVERNIGHT INTO WEDENSDAY MORNING...AND THERE MAY BE PATCHES OF FOG
AND DRIZZLE DURING THIS TIME. GUSTY NORTHWEST WINDS WILL RETURN TO
THE NORTHERN WATERS BY WEDNESDAY EVENING AND CONTINUE INTO LATE
WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PIGEON PT 10-60 NM UNTIL 2 AM
             SCA...PIGEON PT TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 2 AM

&&

$$

PUBLIC FORECAST: CW
AVIATION/MARINE: CANEPA


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