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

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FXUS66 KMTR 011145 CCA
AFDMTR

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
444 AM PDT FRI AUG 1 2014

.SYNOPSIS...THE TYPICAL SUMMER WEATHER PATTERN HAS RETURNED TO
THE DISTRICT WITH NIGHT AND MORNING COASTAL LOW CLOUDS AND FOG
STRETCHING INTO THE VALLEYS AND CLEARING SKIES IN THE AFTERNOON
HOURS. NEAR NORMAL TEMPERATURES AND DRY WEATHER ARE EXPECTED THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 2:56 AM PDT FRIDAY...THERE IS LITTLE CHANGE
IN THE MARINE LAYER DEPTH AS WELL AS THE SURFACE GRADIENT VALUES
NOW AS COMPARED TO YESTERDAY AT THIS TIME. THE FORT ORD PROFILER
CURRENTLY SHOWS A MARINE LAYER DEPTH OF JUST UNDER 1000 FEET...AND
THE SFO-SAC GRADIENT SITS AT 2.7 MB. TEMPERATURES ARE ALSO RUNNING
ABOUT THE SAME...AS ARE DEW POINTS WITH READINGS MAINLY IN THE MID
50S TO MID 60S. THE CURRENT SATELLITE IMAGERY SHOWS HIGH CLOUDS
CURRENTLY MOVING OVER THE GREATER SAN FRANCISCO BAY AREA OBSCURING
THE LOWER CLOUDS BELOW...BUT STRATUS CAN BE SEEN SPREADING WELL
INTO THE SALINAS VALLEY AT THIS TIME. TEMPERATURES ARE EXPECTED TO
BE SIMILAR TO OR SLIGHTLY WARMER THAN THOSE ON THURSDAY WITH
COASTAL AREAS SEEING 60S TO LOWER 70S...AND INLAND AREAS IN THE
80S AND 90S.

FORECAST MODELS MAINTAIN AN UPPER LEVEL RIDGE OVER THE WESTERN
CONUS THROUGH THE WEEKEND WITH A WEAK UPPER LEVEL TROUGH
DEVELOPING ALONG THE COAST BY THE BEGINNING OF NEXT WEEK. AT THE
SURFACE A THERMAL THROUGH POSITIONED ALONG THE COAST WILL PROMOTE
WARM SEASONAL TEMPERATURES INLAND AND COOL TEMPERATURES ALONG THE
COAST. A SLIGHT COOLING TREND IS INDICATED BEGINNING SUNDAY AND
MAINTAINING INTO NEXT WEEK...BUT TEMPERATURES WILL STILL BE AROUND
SEASONAL NORMALS.

&&

.AVIATION...AS OF 4:30 AM PDT FRIDAY...STRATUS COVERS THE
COASTLINE AND HAS MADE SOME INLAND PENETRATION INTO THE NORTH BAY
VALLEYS BUT HAS YET TO ENTER SFO BAY. MARINE LAYER IS SHALLOW AS
EVIDENCED BY THE LOW CIGS AT HAF AND O69. GFS AND LAMP GUIDANCE
HAVE BACKED OFF ON STRATUS INTO SFO WHILE NAM BRINGS STRATUS INTO
SFO FOR A COUPLE OF HOURS. LATEST FORECAST HAS PREDOMINANT VFR
WITH POSSIBLE BRIEF IFR CIGS 13Z-16Z.

VICINITY OF KSFO...POSSIBILITY OF BRIEF IFR CIGS 13Z-16Z.
OTHERWISE VFR.

KSFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...TYPICAL SUMMER STRATUS HAS SETTLED
INTO MRY BAY. LIFR CIGS THROUGH 17Z AT SNS AND 18Z AT MRY.

&&

.MARINE...AS OF 2:53 AM PDT FRIDAY...HIGH PRESSURE WILL BUILD OFF
THE PACIFIC NORTHWEST RESULTING IN INCREASING WINDS IN THE
NORTHERN OUTER WATERS. LIGHT NORTHWEST WINDS WILL CONTINUE OVER
THE REST OF THE NORTHERN AND CENTRAL WATERS.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM NOON

&&

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: W PI

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