Small Craft Advisory 155, NWS San Francisco Bay Area, CA

536 
WHUS76 KMTR 282141
MWWMTR

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
241 PM PDT FRI SEP 28 2012

PZZ530-290400-
/O.CON.KMTR.SC.Y.0155.000000T0000Z-120929T0400Z/
SAN FRANCISCO/SAN PABLO/SUISUN BAYS AND THE WEST DELTA-
241 PM PDT FRI SEP 28 2012

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THIS
EVENING...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THIS
EVENING. 

* WINDS: WEST WINDS BETWEEN 15 AND 25 KT WILL CONTINUE THROUGH THIS
  EVENING. THE STRONGEST WINDS WILL REMAIN NEAR ANGEL ISLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS... ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$


HTTP://WWW.WEATHER.GOV/SANFRANCISCO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
432 AM PDT FRI SEP 28 2012

...WARMER WEATHER FOR THE UPCOMING WEEKEND AND MONDAY...

.DISCUSSION...AS OF 2:15 AM PDT FRIDAY...THE MARINE LAYER DEPTH
APPEARS TO BE AT ABOUT THE SAME DEPTH THAN YESTERDAY AT THIS TIME
WITH THE FORT ORD PROFILER INDICATING A DEPTH OF AROUND 1200 FEET.
SATELLITE IMAGERY SHOWS FOG AND LOW CLOUDS HAVE EXTENDED LOCALLY
INLAND BUT PARTICULARLY OVER THE MONTEREY BAY AREA AND INTO THE
SALINAS VALLEY. AIRPORT VISIBILITIES ARE RANGING FROM GREATER THAN
7 MILES ACROSS THE SAN FRANCISCO BAY AREA...BUT LOWER AROUND THE
MONTEREY BAY WITH BOTH THE MONTEREY AND WATSONVILLE AIRPORTS
VARYING BETWEEN FOUR MILES AND LESS THAN ONE MILE. SURFACE
PRESSURE GRADIENTS INDICATE A CONTINUED ONSHORE FLOW PRESENCE WITH
2.8 MB BETWEEN SFO AND SAC.

GIVEN THE DEEPER MARINE LAYER AS WELL AS CONTINUED ONSHORE
FLOW...EXPECT TODAY'S MAX TEMPS TO BE A TAD COOLER THAN THOSE ON
THURSDAY...PARTICULARLY NEAR THE COAST. THE WARMING TREND IS
EXPECTED TO BEGIN IN EARNEST ON SATURDAY WHEN THE UPPER LEVEL
RIDGE BUILDS EASTWARD OVER CALIFORNIA. HIGHS ON SATURDAY ARE
EXPECTED TO WARM BY 5-12 DEGREES OVER TODAY'S PROJECTED HIGHS.
SUNDAY AND MONDAY ARE EXPECTED TO BE THE WARMEST DAYS AND COULD
SEE A COUPLE DEGREE INCREASE OVER SATURDAY'S NUMBERS. WINDS ARE
NOT FORECAST TO BE STRONG WITH A CONTINUED LIGHT ONSHORE FLOW
COMPONENT WHICH WILL KEEP THE COAST FROM HEATING UP TOO MUCH.
THE RIDGE IS FORECAST TO BEGIN WEAKENING ON TUESDAY. BY
WEDNESDAY...AN APPROACHING UPPER LEVEL TROUGH IS EXPECTED TO COOL
MAX TEMPS BACK TO NEAR NORMAL.

&&

.AVIATION...AS OF 4:30 AM PDT FRIDAY...EVEN THOUGH MARINE LAYER
IS SHALLOW AT AROUND 1000 FEET CONDITIONS ARE SIMILAR TO YESTERDAY.
IFR CIGS WITH LOCALLY REDUCED VSBYS TO 3 MILES WILL SPREAD OVER
THE REST OF THE SFO APPROACH BY 12Z WITH BURNOFF TIME OF 18Z.

VICINITY OF KSFO...IFR FOR CLOUD BASES 500 FEET AND OCCASIONAL
VSBYS DOWN TO 3 MILES. CLOUDS CLEARING BY 18Z WHICH IS SIMILAR TO
YESTERDAY. HAZY CONDITIONS LASTING INTO 20-21Z.

KSFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...LIFR AND VLIFR CIGS THROUGH 17-18Z
WITH VSBYS 1-3 MILES.

&&

.CLIMATE...BELOW IS A LISTING OF THE WARMEST HIGH TEMPERATURES
RECORDED SO FAR THIS YEAR AT SELECT LOCATIONS AROUND THE REGION
COMPARED TO FORECAST HIGHS FOR SATURDAY...SUNDAY AND MONDAY.

                     WARMEST            FORECAST HIGH FOR...
LOCATION             TEMP/DATE          SAT    SUN    MON

SANTA ROSA AP       103 ON 6/16         89     94     94
SAN RAFAEL           99 ON 6/16         85     91     91
NAPA                101 ON 6/16         87     92     92
SAN FRANCISCO        86 ON 6/16         71     80     79
SAN FRANCISCO AP     87 ON 6/16         74     83     81
REDWOOD CITY         98 ON 6/16         82     90     89
CONCORD             102 ON 6/17         90     96     96
OAKLAND              87 ON 6/16         78     86     86
LIVERMORE           105 ON 8/11         95     98    100
FREMONT              94 ON 6/16         84     89     90
SAN JOSE             98 ON 6/16         89     91     92
SANTA CRUZ           90 ON 8/28         80     87     89
MONTEREY             76 ON 6/11         66     75     77
HOLLISTER            96 ON 8/10         90     94     94
SALINAS              87 ON 4/21         73     83     84
KING CITY            98 ON 6/16         85     91     92

&&

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

PUBLIC FORECAST: SIMS
AVIATION/MARINE: W PI

VISIT US AT WWW.WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK AND TWITTER AT:
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.SANFRANCISCOBAYAREA.GOV
WWW.TWITTER.COM/NWSBAYAREA

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
454 AM PDT FRI SEP 28 2012

CAZ006-505>513-516>518-528>530-291300-
SAN FRANCISCO-
COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE-
NORTH BAY INTERIOR VALLEYS-NORTH BAY MOUNTAINS-
SAN FRANCISCO BAY SHORELINE-SAN FRANCISCO PENINSULA COAST-
EAST BAY INTERIOR VALLEYS-EAST BAY HILLS AND DIABLO RANGE-
SANTA CRUZ MOUNTAINS-SANTA CLARA VALLEY...INCLUDING SAN JOSE-
SOUTHERN SALINAS VALLEY...ARROYO SECO...AND LAKE SAN ANTONIO-
SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST-
MOUNTAINS OF SAN BENITO AND INTERIOR MONTEREY COUNTY INCLUDING
PINNACLES NATIONAL MONUMENT-
NORTHERN SALINAS VALLEY...HOLLISTER VALLEY...AND CARMEL VALLEY-
NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST-
454 AM PDT FRI SEP 28 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SAN FRANCISCO BAY AREA AND
MONTEREY BAY AREA.

.DAY ONE...FRIDAY AND FRIDAY NIGHT

AREAS OF COASTAL FOG ARE PRESENT THIS MORNING ACROSS THE AREA.
PATCHES OF LOCALLY DENSE FOG ARE POSSIBLE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

MUCH WARMER WEATHER IS EXPECTED TO DEVELOP OVER THE WEEKEND
AND INTO EARLY NEXT WEEK. THE WARMEST DAYS ARE FORECAST TO BE
SUNDAY AND MONDAY. HIGH TEMPERATURES WILL RANGE FROM THE 70S AND
80S NEAR THE OCEAN...AND FROM THE 90S TO 105 INLAND. HEAT
ADVISORIES MAY BE NEEDED FOR PORTIONS OF THE AREA ON SUNDAY AND
MONDAY.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS PER STANDARD OPERATING PROCEDURES.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
449 AM PDT FRI SEP 28 2012

CAZ006-505>513-516>518-528>530-290000-
SAN FRANCISCO-
COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE-
NORTH BAY INTERIOR VALLEYS-NORTH BAY MOUNTAINS-
SAN FRANCISCO BAY SHORELINE-SAN FRANCISCO PENINSULA COAST-
EAST BAY INTERIOR VALLEYS-EAST BAY HILLS AND DIABLO RANGE-
SANTA CRUZ MOUNTAINS-SANTA CLARA VALLEY...INCLUDING SAN JOSE-
SOUTHERN SALINAS VALLEY...ARROYO SECO...AND LAKE SAN ANTONIO-
SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST-
MOUNTAINS OF SAN BENITO AND INTERIOR MONTEREY COUNTY INCLUDING
PINNACLES NATIONAL MONUMENT-
NORTHERN SALINAS VALLEY...HOLLISTER VALLEY...AND CARMEL VALLEY-
NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST-
449 AM PDT FRI SEP 28 2012

...MUCH WARMER WEATHER ON TAP FOR THE SAN FRANCISCO AND MONTEREY
BAY REGION...

A RIDGE OF HIGH PRESSURE WILL MOVE OVER THE STATE BEGINNING ON
SATURDAY AND CONTINUE TO AFFECT THE AREA INTO EARLY NEXT WEEK.
TEMPERATURES WILL WARM EACH DAY AND COULD APPROACH SOME OF THE HIGHEST
LEVELS SINCE JUNE. INLAND SPOTS WILL LIKELY SEE HIGHS IN THE 90S
TO LOWER 100S WHILE MANY COASTAL SPOTS WILL EVEN HAVE HIGHS IN THE
70S TO LOWER 80S OVER THE WEEKEND INTO MONDAY. THE WARMEST DAYS
FOR MOST COMMUNITIES ARE EXPECTED TO BE ON SUNDAY AND MONDAY.
OVERNIGHT LOWS WILL DROP BACK INTO THE 50S AND 60S FOR MANY
LOCATIONS FOR SATURDAY NIGHT THROUGH MONDAY NIGHT WITH WARMER
OVERNIGHT TEMPERATURES IN THE HILLS. PEOPLE ACROSS THE DISTRICT
...ESPECIALLY THOSE WITH OUTDOOR PLANS...SHOULD BE PREPARED FOR
VERY WARM CONDITIONS THIS WEEKEND AND EARLY NEXT WEEK.