Weather Service Report


244 
FXUS66 KMTR 281804
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1104 AM PDT THU AUG 28 2014

.SYNOPSIS...ABOVE AVERAGE TEMPERATURES AND DRY WEATHER CONDITIONS
WILL PERSIST THROUGH THE REMAINDER OF THE WEEK DUE TO HIGH
PRESSURE ALONG THE WEST COAST. AFTERNOON TEMPERATURES THEN TREND
SLIGHTLY COOLER THROUGH LABOR DAY AS THE RIDGE WEAKENS AND AN
UPPER LEVEL TROUGH IMPACTS NORTHERN CALIFORNIA.

&&

.DISCUSSION...AS OF 8:35 AM PDT THURSDAY...NICE SATELLITE LOOP
THIS MORNING WITH TROPICAL STORM MARIE CLEARLY DEFINED CENTERED
AROUND 900 MILES SW OF SAN FRANCISCO. ALSO BASED ON SATELLITE AND
OBSERVATIONS, MINOR FORECAST UPDATE ISSUED EARLIER TO INCREASE
CLOUD COVER ALONG WITH FOG THROUGH THE SALINAS VALLEY. OTHERWISE,
MAIN STORY FOR TODAY THROUGH AT LEAST MOST OF NEXT WEEK IS FOR
QUIET WEATHER WITH CLOUDS AT THE COAST FOR THE OVERNIGHT HOURS AND
SUNSHINE AT MOST SPOTS DURING THE DAY. TEMPS WILL BE SEASONABLE
WITH HIGHS GENERALLY 60S AND 70S AT THE COAST WITH UPPER 70S TO
LOWER 90S INLAND.

.PREVIOUS DISCUSSION...THE RETURN OF A BETTER DEFINED MARINE
LAYER HAS ALLOWED COASTAL CLOUDS TO DEVELOP AND PUSH INLAND THIS
MORNING. THIS HAS KEPT TEMPERATURES ACROSS THE REGION IN THE
MID/UPPER 50S TO LOWER 60S. HOWEVER...CLOUD COVER SHOULD QUICKLY
BURN-OFF BY LATE MORNING AND GIVE WAY TO MOSTLY SUNNY SKIES INLAND
AND WARM AFTERNOON TEMPERATURES. OVERALL...MOST LOCATIONS WILL BE
A FEW TO SEVERAL DEGREES ABOVE SEASONAL AVERAGES AS HIGH PRESSURE
ALOFT CONTINUES TO IMPACT THE REGION.

LITTLE CHANGE IS EXPECTED ON FRIDAY AS THE MID/UPPER LEVEL RIDGE
CONTINUES TO INFLUENCE THE REGION. THE TAIL END OF AN UPPER LEVEL
TROUGH WILL THEN DROP SOUTHWARD ACROSS NORTHERN CALIFORNIA LATE
FRIDAY INTO SATURDAY AND BRING TEMPERATURES BACK TO NEAR SEASONAL
AVERAGES. DURING THIS TIME...THE MARINE LAYER WILL LIKELY DEEPEN
AND INCREASE THE AMOUNT OF OVERNIGHT/EARLY MORNING COASTAL CLOUDS
AND PATCHY FOG THROUGHOUT THE WEEKEND. IN ADDITION...CANNOT RULE
OUT THE POSSIBILITY OF PATCHY DRIZZLE ALONG COASTAL LOCATIONS THIS
WEEKEND.

SEASONAL TEMPERATURES AND DRY WEATHER CONDITIONS ARE LIKELY TO
PERSIST ON LABOR DAY AND THROUGH THE MIDDLE OF NEXT WEEK AS THE
REGION REMAINS UNDER A DRY NORTHWEST FLOW ALOFT. TOWARD THE END OF
THE EXTENDED PERIOD...MEDIUM RANGE FORECAST MODELS ARE INDICATING
A DEEPER MID/UPPER LEVEL TROUGH WILL IMPACT THE REGION LATE NEXT
WEEK. AT THIS TIME...THIS SYSTEM APPEARS TO BE A DRY ONE AND WOULD
MOST LIKELY COOL TEMPERATURES TO BELOW AVERAGE REGION WIDE. 

&&

.AVIATION...AS OF 11:00 AM PDT THURSDAY...LOW CLOUDS HAVE CLEARED
ACROSS MOST AREA TERMINALS THIS MORNING. VFR CONDITIONS EXPECTED
TO PREVAIL THROUGH THE AFTERNOON AND EARLY EVENING OVER MOST
TERMINALS. CIGS EXPECTED TO RETURN TO MONTEREY BAY TERMINALS AFTER
02Z THIS EVENING AND ACROSS BAY AREA TERMINALS AFTER 06Z. LIGHT
WINDS WILL PICK UP OUT OF THE WEST THIS AFTERNOON WITH LOCALLY
STRONGER WINDS AROUND KSFO AND KOAK. 

VICINITY OF KSFO...LOW CLOUDS EXPECTED TO CLEAR FROM KOAK WITHIN
THE NEXT HOUR. VFR CONDITIONS EXPECTED TO PREVAIL THROUGH THE LATE
THIS EVENING. IFR CIGS EXPECTED TO RETURN AFTER 06Z TONIGHT. LIGHT
WINDS WILL CONTINUE THROUGH THE MORNING WITH THE AFTERNOON
SEABREEZE INCREASING TO AROUND 15 TO 20 KT IN THE VICINITY OF KSFO
AND KOAK.

KSFO BRIDGE APPROACH...VFR CONDITIONS EXPECTED THROUGH LATE
TONIGHT. IFR CIGS AFFECTING THE APPROACH AFTER 10Z FRIDAY MORNING.
THE APPROACH WILL SCATTER OUT AROUND 18Z FRIDAY.

MONTEREY BAY AREA TERMINALS...VFR CONDITIONS EXPECTED TO PREVAIL
THROUGH EARLY EVENING. IFR CIGS EXPECTED TO RETURN AFTER 02Z.
LIGHT WINDS WILL CONTINUE THROUGH THE MORNING WITH THE AFTERNOON
SEABREEZE INCREASING TO AROUND 10 TO 15 KT.

&&

.MARINE...AS OF 8:30 AM PDT THURSDAY...HIGH PRESSURE WILL BUILD
OFF THE NORTHERN CALIFORNIA COAST ON FRIDAY RESULTING IN
INCREASING NORTHWEST WINDS THAT WILL LAST THROUGH THE WEEKEND.
SOUTHERLY SWELL FROM HURRICANE MARIE WILL GRADUALLY SUBSIDE
THROUGH THE END OF THE WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

&&

$$

PUBLIC FORECAST: BELL/RGASS
AVIATION/MARINE: CW

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