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

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000
FXUS66 KMTR 250325
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
825 PM PDT SUN MAY 24 2015

.SYNOPSIS...AFTER A COUPLE MORE DAYS OF COOLER THAN NORMAL
TEMPERATURES...WARMER WEATHER IS EXPECTED DURING THE SECOND HALF
OF THE WEEK...ESPECIALLY FOR INLAND AREAS. HOWEVER...COASTAL
AREAS WILL REMAIN SEASONABLY COOL AS ONSHORE FLOW PERSISTS.

&&

.DISCUSSION...AS OF 8:25 PM PDT SUNDAY...EXCEPT FOR SOME INLAND
VALLEY AND HIGHER ELEVATION LOCATIONS...THE EXPECTED WARMING DID
NOT MATERIALIZE TODAY AS MODERATE ONSHORE FLOW CONTINUED TO ADVECT
COOL MARINE AIR INLAND. IN ADDITION...A DEEP MARINE LAYER
RESULTED IN SLOW CLEARING INLAND AND LITTLE OR NO COASTAL
CLEARING.

LITTLE CHANGE IS EXPECTED OVER THE NEXT COUPLE OF DAYS.
TEMPERATURES WILL HOLD NEAR PERSISTENCE OR EVEN COOL SLIGHTLY AS
AN UPPER LOW SETTLES IN THE PACIFIC NORTHWEST. THIS TROUGHING TO
OUR NORTH MAY ACT TO DEEPEN AN ALREADY DEEP MARINE LAYER. IN
ADDITION...LITTLE CHANGE IS EXPECTED IN THE STRENGTH OF ONSHORE
FLOW. HIGH TEMPERATURES WILL REMAIN ANYWHERE FROM TWO TO TEN
DEGREES BELOW NORMAL. WIDESPREAD NIGHT AND MORNING LOW CLOUDS WILL
PERSIST AND MANY COASTAL AREAS WILL REMAIN UNDER THE CLOUDS
THROUGHOUT THE DAY ON MONDAY AND TUESDAY.

THE UPPER LEVEL RIDGE CURRENTLY CENTERED OFFSHORE ALONG 135W IS
FORECAST TO SHIFT EASTWARD BY MIDWEEK. BOTH THE GFS AND ECMWF
FORECAST THE RIDGE AXIS TO BE ALIGNED ALONG THE WEST COAST BY LATE
THURSDAY. THIS WILL RESULT IN WARMING TREND FROM WEDNESDAY THROUGH
FRIDAY. MOST OF THE WARMING WILL OCCUR ACROSS INLAND AREAS WHERE
HIGH TEMPERATURES WILL WARM INTO THE 80S IN SOME SPOTS FOR THE
FIRST TIME IN NEARLY 4 WEEKS. COASTAL AREAS WILL REMAIN RELATIVELY
COOL...HOWEVER...AS ONSHORE FLOW PERSISTS. THE MARINE LAYER WILL
BECOME MORE SHALLOW...BUT IS EXPECTED TO REMAIN ENTRENCHED NEAR
THE COAST.

&&

.AVIATION...AS OF 4:58 PM PDT SUNDAY...FOR 00Z TAFS. OVERCAST
CONDITIONS WILL PREVAIL ACROSS KSFO AND KOAK AS WELL AS MONTEREY
BAY AREA TERMINALS THROUGH THE PERIOD. STRATUS WILL RETURN
OVERNIGHT ACROSS THE REST OF THE AREA WITH STRATUS PUSHING BACK TO
THE COAST BY NOON MONDAY. MODERATE ONSHORE FLOW WILL CONTINUE
THROUGH LATE THIS EVENING WITH SLIGHTLY LIGHTER WINDS ANTICIPATED
OVERNIGHT.

VICINITY OF KSFO...MVFR CIGS WILL PERSIST THROUGH THE PERIOD WITH
IFR CIGS POSSIBLE OVERNIGHT. MODERATE ONSHORE FLOW WILL PREVAIL.

KSFO BRIDGE APPROACH...MVFR CIGS WILL BACK INTO THE BAY THIS
EVENING WITH CIGS LOWERING TO AROUND 1000 FEET OVERNIGHT. CIGS
WILL CLEAR FROM THE SOUTH MONDAY MORNING BUT HAND ON OVER AREA
TERMINALS.

MONTEREY BAY AREA TERMINALS...MFR CIGS WILL PERSIST THROUGH THE
PERIOD WITH IFR CIGS POSSIBLE OVERNIGHT. MODERATE ONSHORE FLOW
WILL PREVAIL.

&&

.MARINE...AS OF 3:00 PM PDT SUNDAY...NW WINDS WILL CONTINUE
TONIGHT ACROSS THE OCEAN WATERS WITH A MODERATE SEA BREEZE INTO THE
BAYS THIS EVENING. WINDS WILL EASE ON MEMORIAL DAY INTO TUESDAY
WITH FAIRLY LIGHT SEAS. SOME SLIGHTLY STRONGER NW WINDS WILL
RETURN BY LATE IN THE WEEK BUT IN GENERAL EXPECT A PROLONGED
PERIOD OF GENERALLY LIGHT WIND AND SEAS.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...SF BAY NORTH OF THE BAY BRIDGE UNTIL 9 PM
             SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 9 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM UNTIL 9 PM

&&

$$

PUBLIC FORECAST: DYKEMA
AVIATION: CW
MARINE: RWW

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