PZZ560-565-041615-
 PIGEON POINT TO POINT PINOS TO 10 NM-
 POINT PINOS TO POINT PIEDRAS BLANCAS TO 10 NM-
 230 AM PDT SAT JUL 4 2009
 
 .TODAY...S WINDS 10 KT...BECOMING SW IN THE AFTERNOON. WIND WAVES
 2 FT OR LESS. NW SWELL 2 TO 3 FT AT 9 SECONDS. PATCHY FOG. 
 .TONIGHT...SW WINDS 10 KT...BECOMING S AFTER MIDNIGHT. WIND WAVES
 2 FT OR LESS. NW SWELL 2 TO 3 FT AT 8 SECONDS. PATCHY FOG. 
 .SUN...S WINDS 5 KT...BECOMING W IN THE AFTERNOON. WIND WAVES
 2 FT OR LESS. MIXED SWELL NW 2 TO 3 FT AT 7 SECONDS AND S 3 FT AT
 16 SECONDS. PATCHY FOG. 
 .SUN NIGHT...NW WINDS 5 TO 15 KT. WIND WAVES 2 FT OR LESS...
 BECOMING 3 FT AFTER MIDNIGHT. MIXED SWELL NW 2 TO 3 FT AND S
 3 FT. PATCHY FOG. 
 .MON...NW WINDS 15 TO 25 KT. WIND WAVES 3 TO 5 FT. NW SWELL 2 TO
 3 FT. SW SWELL 3 FT. PATCHY FOG. 
 .TUE...NW WINDS 15 TO 25 KT. WIND WAVES 3 TO 5 FT. NW SWELL 3 TO
 5 FT. PATCHY FOG. 
 .WED...NW WINDS 15 TO 25 KT. WIND WAVES 3 TO 5 FT. NW SWELL 4 TO
 6 FT. PATCHY FOG.  
 
 

 
 FXUS66 KMTR 041128 
  AFDMTR 
   
  AREA FORECAST DISCUSSIONAREA FORECAST DISCUSSION
This National Weather Service
product is intended to provide a
well-reasoned discussion of the
meteorological thinking which went
into the preparation of the Zone
Forecast Product. The forecaster
will try to focus on the most
particular challenges of the
forecast. The text will be written
in plain language or in proper
contractions. At the end of the
discussion, there will be a list of
all advisor...
Click for More... 
  NATIONAL WEATHER SERVICENATIONAL WEATHER SERVICE
An agency of the Federal Government
within the Department of Commerce,
National Oceanic and Atmospheric
Click for More... SAN FRANCISCO BAY AREA CACA
California
Click for More... 
  427 AM PDT SATSAT
1.Satellite (imagery) 2.Saturday
Click for More... JUL 4 2009 
   
  .DISCUSSION...AS OF 3:40 AM PDT SATURDAY...FOGFOG
(abbrev. F) Fog is water droplets
suspended in the air at the Earth's
surface. Fog is often hazardous
when the visibility is reduced to ¼
mile or less.
Click for More... PRODUCT IMAGERY LOOKS 
  ALMOST IDENTICAL TO THE LAST COUPLE OF MORNINGS. STRATUSSTRATUS
A low, generally gray cloud layer
with a fairly uniform base. Stratus
may appear in the form of ragged
patches, but otherwise does not
exhibit individual cloud elements
as do cumulus and stratocumulus
clouds. Fog usually is a
surface-based form of stratus.
Click for More... COVERS THE 
  COAST...BAYS...AND INTO THE VALLEYS. THE FORT ORD PROFILER IS INDCINDC
Indicate
Click for More... 
  THAT THE MARINE INVERSIONMARINE INVERSION
Temperature inversion produced when
cold marine air underlies warmer
air.
Click for More... IS AROUND 1800 FTFT
Feet (or foot)
Click for More.... TEMPSTEMPS
Temperatures
Click for More... THIS MORNING ARE 
  MAINLY IN THE 50S...WITH 60S AND 70S ABOVE THE MARINE INVERSIONMARINE INVERSION
Temperature inversion produced when
cold marine air underlies warmer
air.
Click for More... IN 
  THE HILLS. THE GRADIENTGRADIENT
(abbrev. GRAD) A rate of change
with respect to distance of a
variable quantity, as temperature
or pressure, in the direction of
maximum change.
Click for More... PATTERN IS ALSO LITTLE CHANGED...ONLY A 0.8 
  MBMB
Millibar
Click for More... NORTHERLY GRADIENTGRADIENT
(abbrev. GRAD) A rate of change
with respect to distance of a
variable quantity, as temperature
or pressure, in the direction of
maximum change.
Click for More... BETWEEN ARCATA-SFO AND A MODERATE 3.3 MBMB
Millibar
Click for More... 
  ONSHORE GRADIENTGRADIENT
(abbrev. GRAD) A rate of change
with respect to distance of a
variable quantity, as temperature
or pressure, in the direction of
maximum change.
Click for More... BETWEEN SFO-SAC. 
   
  WATER VAPOR IMAGERY IS INDCINDC
Indicate
Click for More... A SLOWLY DEEPENING TROFTROF
Trough
Click for More... CROSSING 140 WW
West
Click for More.... 
  THIS TROFTROF
Trough
Click for More... WILL MOVE SLOWLY TO THE COAST THIS WEEKEND...THEN BECOME 
  STATIONARY ALONG THE COAST. THE MAIN RESULT WILL BE PROGRESSIVELY 
  COOLER TEMPSTEMPS
Temperatures
Click for More... THROUGH THE WEEKEND AND INTO THE MIDDLE OF NEXT WEEK. 
  INLAND AREAS WILL BE ANYWHERE FROM 5 TO 15 DEGREES BELOW NORMAL 
  TUESDAY AND WEDNESDAY. IN FACT...TEMPERATURES IN LIVERMORE WILL BE 
  MORE LIKE LATE MAY THAN EARLY JULY. WITH THE ONSHORE FLOWONSHORE FLOW
Occurs when air moves from sea to
land, and is usually associated
wtih increased moisture.
Click for More......STRATUSSTRATUS
A low, generally gray cloud layer
with a fairly uniform base. Stratus
may appear in the form of ragged
patches, but otherwise does not
exhibit individual cloud elements
as do cumulus and stratocumulus
clouds. Fog usually is a
surface-based form of stratus.
Click for More... 
  WILL BE PREVALENT ALONG THE COAST...AND INTO THE VALLEYS DURING THE 
  NIGHT AND MORNING HOURS. 
   
  THE 00Z ECMWFECMWF
European Center for Medium-Range
Weather Forecasts. Operational
references in forecast discussions
typically refer to the ECMWF's
medium-range numerical forecast
model, which runs out to 10 days.
Click for More... AND THE 06Z GFSGFS
Global Forecast System - One of the
operational forecast models run at
NCEP. The GFS is run four times
daily, with forecast output out to
384 hours.
Click for More... BOTH INDCINDC
Indicate
Click for More... WARMER TEMPERATURES MOVING 
  BACK INTO THE DISTRICT THE END OF THE WEEK...AND INTO THE WEEKEND AS 
  A RIDGERIDGE
An elongated area of relatively
high atmospheric pressure; the
opposite of trough.
Click for More... BUILDS NORTHWEST FROM THE DESERT SWSW
Southwest
Click for More.... INLAND TEMPSTEMPS
Temperatures
Click for More... BY NEXT 
  WEEKEND COULD BE ABOVE NORMAL ONCE AGAIN. HOWEVER...THIS LOOKS TO BE 
  SHORT-LIVED AS MEDIUM RANGE MODELS BRING YET ANOTHER TROFTROF
Trough
Click for More... TO THE WEST 
  COAST...WITH THE 06Z GFSGFS
Global Forecast System - One of the
operational forecast models run at
NCEP. The GFS is run four times
daily, with forecast output out to
384 hours.
Click for More... MORE BULLISH ON THAT SCENARIO. 
   
  && 
   
  .AVIATION...AS OF 4:26 AM SATURDAY...WIDESPREAD STRATUSSTRATUS
A low, generally gray cloud layer
with a fairly uniform base. Stratus
may appear in the form of ragged
patches, but otherwise does not
exhibit individual cloud elements
as do cumulus and stratocumulus
clouds. Fog usually is a
surface-based form of stratus.
Click for More... COVERS 
  ALL TERMINALS THIS MORNING. THE MARINE LAYER IS A TOUCH DEEPER THAN 
  YESTERDAY AND IS APPROX AT 2K FEET WITH INCREASED SFO-SAC GRADIENTGRADIENT
(abbrev. GRAD) A rate of change
with respect to distance of a
variable quantity, as temperature
or pressure, in the direction of
maximum change.
Click for More... 
  OF 3 PLUS MBMB
Millibar
Click for More....  THAT BEING SAID...THINK BURN OFF TIMES THIS MORNING 
  WILL BE A LITTLE LATER THAN YESTERDAY. 
   
  VICINITY OF KSFO...WIDESPREAD CIGS COVER THE BAY AT 1100-1400 FEET. 
  BURN OFF THIS MORNING WILL  LIKELY OCCUR BETWEEN 17-18Z.  18Z MAY 
  BE THE BETTER BET WITH THE INCREASED ONSHORE FLOWONSHORE FLOW
Occurs when air moves from sea to
land, and is usually associated
wtih increased moisture.
Click for More....  AFTERNOON GUSTY 
  NWNW
Northwest
Click for More... WINDS WILL BE POSS AT KSFO.  STRATUSSTRATUS
A low, generally gray cloud layer
with a fairly uniform base. Stratus
may appear in the form of ragged
patches, but otherwise does not
exhibit individual cloud elements
as do cumulus and stratocumulus
clouds. Fog usually is a
surface-based form of stratus.
Click for More... WILL MOVE IN AGAIN TONIGHT 
  WITH SIMILAR RESULTS. 
   
  KSFO BRIDGE APPROACH...CIGS AND BURN OFF TIME WILL BE SIMILAR TO 
  KSFO. 
   
  MONTEREY BAY TERMINALS...STRATUSSTRATUS
A low, generally gray cloud layer
with a fairly uniform base. Stratus
may appear in the form of ragged
patches, but otherwise does not
exhibit individual cloud elements
as do cumulus and stratocumulus
clouds. Fog usually is a
surface-based form of stratus.
Click for More... OVER MRY AND SNS THROUGH 18-19Z. 
  STRATUSSTRATUS
A low, generally gray cloud layer
with a fairly uniform base. Stratus
may appear in the form of ragged
patches, but otherwise does not
exhibit individual cloud elements
as do cumulus and stratocumulus
clouds. Fog usually is a
surface-based form of stratus.
Click for More... WILL ONCE AGAIN MAKE AN EARLY RETURN TONIGHT. 
   
  && 
   
  .MTR WATCHES/WARNINGS/ADVISORIES... 
       .TDA...SCA...SF BAY STARTING AT 11 AM. 
   
  && 
   
  
 
   
  PUBLIC FORECAST: MHS 
  AVIATION/MARINE: MM 
   
  NWSNWS
National Weather Service. An agency
of the Federal Government within
the Department of Commerce,
National Oceanic and Atmospheric
Click for More... ON THE WEB AT WEATHER.GOV/SANFRANCISCO