Small Craft Advisory 321, NWS San Francisco Bay Area, CA

090 
WHUS76 KMTR 311539
MWWMTR

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
ISSUED BY NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
839 AM PDT WED AUG 31 2011

PZZ570-312200-
/O.CON.KMTR.GL.W.0013.000000T0000Z-110831T2200Z/
WATERS FROM PT. ARENA TO PIGEON PT. CA FROM 10 TO 60 NM-
839 AM PDT WED AUG 31 2011

...GALE WARNING REMAINS IN EFFECT UNTIL 3 PM PDT THIS AFTERNOON...

A GALE WARNING REMAINS IN EFFECT UNTIL 3 PM PDT THIS AFTERNOON. 

* WINDS: NW WINDS 20 TO 30 KT WITH FREQUENT GALE FORCE GUSTS TO 
  35 KT EXPECTED THROUGH THIS AFTERNOON. 

* WAVES: STEEP FRESH SWELL WILL BE GENERATED BY THESE STRONG 
  WINDS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURRING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

&&

$$

PZZ540-312245-
/O.CON.KMTR.SC.Y.0320.000000T0000Z-110901T1000Z/
POINT ARENA TO POINT REYES TO 10 NM-
839 AM PDT WED AUG 31 2011

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT
THURSDAY...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY.

* WINDS: NW WINDS 15 TO 25 KT WITH GUSTS TO 30 KT THROUGH 
  TONIGHT.

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.

&&

$$

PZZ575-312245-
/O.CON.KMTR.SC.Y.0318.000000T0000Z-110901T1000Z/
WATERS FROM PIGEON PT. TO PT. PIEDRAS BLANCAS CA FROM 10 TO 60 NM-
839 AM PDT WED AUG 31 2011

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT
THURSDAY...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY.

* WINDS: NW WINDS 15 TO 25 KT WILL CONTINUE THROUGH TONIGHT.

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.

&&

$$

PZZ530-312245-
/O.CON.KMTR.SC.Y.0321.110831T2000Z-110901T0200Z/
SAN FRANCISCO/SAN PABLO/SUISUN BAYS AND THE WEST DELTA-
839 AM PDT WED AUG 31 2011

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS
AFTERNOON TO 7 PM PDT THIS EVENING...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON
TO 7 PM PDT THIS EVENING. 

* WINDS: W TO SW WINDS 15 TO 25 KT WITH STRONGEST WINDS NEAR 
  ANGEL ISLAND AND THE GOLDEN GATE. 

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

335 
WHUS76 KMTR 312112
MWWMTR

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
ISSUED BY NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
212 PM PDT WED AUG 31 2011

PZZ570-010430-
/O.EXT.KMTR.GL.W.0013.000000T0000Z-110901T1000Z/
WATERS FROM PT. ARENA TO PIGEON PT. CA FROM 10 TO 60 NM-
212 PM PDT WED AUG 31 2011

...GALE WARNING NOW IN EFFECT UNTIL 3 AM PDT THURSDAY...

THE GALE WARNING IS NOW IN EFFECT UNTIL 3 AM PDT THURSDAY. 

* WINDS: NW WINDS 20 TO 30 KT WITH FREQUENT GALE FORCE GUSTS TO 
  35 KT EXPECTED THROUGH THIS AFTERNOON. 

* WAVES: STEEP FRESH SWELL WILL BE GENERATED BY THESE STRONG 
  WINDS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURRING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

&&

$$

PZZ540-010430-
/O.CON.KMTR.SC.Y.0320.000000T0000Z-110901T1000Z/
POINT ARENA TO POINT REYES TO 10 NM-
212 PM PDT WED AUG 31 2011

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT
THURSDAY...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY.

* WINDS: NW WINDS 15 TO 25 KT WITH GUSTS TO 30 KT THROUGH 
  TONIGHT. 

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.

&&

$$

PZZ575-010430-
/O.CON.KMTR.SC.Y.0318.000000T0000Z-110901T1000Z/
WATERS FROM PIGEON PT. TO PT. PIEDRAS BLANCAS CA FROM 10 TO 60 NM-
212 PM PDT WED AUG 31 2011

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT
THURSDAY...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY.

* WINDS: NW WINDS 15 TO 25 KT WILL CONTINUE THROUGH TONIGHT.

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.

&&

$$

PZZ530-010200-
/O.CON.KMTR.SC.Y.0321.000000T0000Z-110901T0200Z/
SAN FRANCISCO/SAN PABLO/SUISUN BAYS AND THE WEST DELTA-
212 PM PDT WED AUG 31 2011

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM PDT THIS
EVENING...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM PDT THIS
EVENING. 

* WINDS: W TO SW WINDS 15 TO 25 KT WITH STRONGEST WINDS NEAR 
  ANGEL ISLAND AND THE GOLDEN GATE. 

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

361 
WHUS76 KMTR 010205
MWWMTR

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
705 PM PDT WED AUG 31 2011

PZZ530-010600-
/O.EXP.KMTR.SC.Y.0321.000000T0000Z-110901T0200Z/
/O.EXB.KMTR.SC.Y.0320.000000T0000Z-110901T0600Z/
SAN FRANCISCO/SAN PABLO/SUISUN BAYS AND THE WEST DELTA-
705 PM PDT WED AUG 31 2011

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING.

* WINDS: W TO SW WINDS 15 TO 25 KT WITH STRONGEST WINDS NEAR ANGEL
  ISLAND AND THE GOLDEN GATE.

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.

&&

$$

PZZ570-011000-
/O.CON.KMTR.GL.W.0013.000000T0000Z-110901T1000Z/
WATERS FROM PT. ARENA TO PIGEON PT. CA FROM 10 TO 60 NM-
705 PM PDT WED AUG 31 2011

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY...

A GALE WARNING REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY. 

* WINDS: NW WINDS 20 TO 30 KT WITH FREQUENT GALE FORCE GUSTS TO 
  35 KT EXPECTED THROUGH TONIGHT. 

* WAVES: STEEP FRESH SWELL WILL BE GENERATED BY THESE STRONG 
  WINDS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURRING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

&&

$$

PZZ540-011000-
/O.CON.KMTR.SC.Y.0320.000000T0000Z-110901T1000Z/
POINT ARENA TO POINT REYES TO 10 NM-
705 PM PDT WED AUG 31 2011

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT
THURSDAY...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY.

* WINDS: NW WINDS 15 TO 25 KT WITH GUSTS TO 30 KT THROUGH 
  TONIGHT. 

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.

&&

$$

PZZ575-011000-
/O.CON.KMTR.SC.Y.0318.000000T0000Z-110901T1000Z/
WATERS FROM PIGEON PT. TO PT. PIEDRAS BLANCAS CA FROM 10 TO 60 NM-
705 PM PDT WED AUG 31 2011

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT
THURSDAY...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY.

* WINDS: NW WINDS 15 TO 25 KT WILL CONTINUE THROUGH TONIGHT.

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
200 AM PDT WED AUG 31 2011

.DISCUSSION...AS OF 2:00 AM PDT WEDNESDAY...SIMILAR TO TUESDAY
MORNING LOW CLOUDS ARE GATHERING ALONG THE COAST WITH AREAS OF
STRATUS NOW MOVING INLAND. THE MARINE LAYER IS ROUGHLY 2000-2200 FEET
DEEP PER THE FORT ORD PROFILER.

A DRY UPPER LEVEL TROUGH OVER NORCAL WILL INFLUENCE THE WEATHER
TODAY THROUGH WEDNESDAY NIGHT POSSIBLY EARLY THURSDAY AS WELL. BY
THURSDAY SURFACE PRESSURES WILL BUILD OVER THE GREAT BASIN SETTING
UP THE POSSIBILITY FOR A BRIEF PERIOD OF OFFSHORE FLOW. RIGHT NOW
THE LATEST GFS MODEL IS INDICATING 6-7 MB WMC-SFO GRADIENT WHICH IS
MODERATE AT BEST. GIVEN THE PERSISTENCE OF UPPER LEVEL TROUGHING
THIS SUMMER AND THE FACT THAT IT IS STILL A BIT EARLY FOR OFFSHORE
FLOW SEASON AM NOT ENTIRELY SURE HOW WELL THE OFFSHORE FLOW WILL TAKE
HOLD. IT COULD BE TRANSITORY ENOUGH THAT THERE IS HARDLY ANY IMPACT
BESIDES A MODEST INCREASE IN TEMPERATURES AND DECREASE IN HUMIDITIES
ACROSS INLAND VALLEYS BUT WITH LITTLE MIXING OF STRATUS AT THE
IMMEDIATE COASTLINE. IF THE SURFACE TROUGH DOES NOT MIGRATE TO THE
COAST THEN CLEARING OF THE COASTAL STRATUS WILL BE SLOWED OR
LIMITED. OVERALL TEMPERATURES WILL UP-TREND LATE IN THE WORK WEEK
DEPENDING ON HOW WELL ESTABLISHED THE OFFSHORE FLOW BECOMES.

BY SATURDAY AFTERNOON THE OFFSHORE GRADIENT WILL RELAX ONCE AGAIN
LEAVING THE STRATUS ROOM TO REDEVELOP. ANOTHER UPPER LEVEL TROUGH
WILL BY THIS TIME WILL MIGRATE OFF THE EAST PACIFIC. THIS WILL BRING
A RETURN TO THE ONSHORE WIND FLOW AND THEREFORE TEMPERATURES WILL
GRADUALLY COOL A BIT. OTHERWISE DRY WEATHER WILL CONTINUE DURING THE
PERIOD.

&&

.AVIATION...AS OF 5:15 PM TUESDAY...THE NORTHERLY GRADIENT CONTINUES
TO STRENGTHEN AND IS CURRENTLY AT 4.6 MB FROM ARCATA TO SFO.
ORIGINALLY THOUGHT TO BRING STRATUS IN EARLIER DUE TO THE 2200 FOOT
MARINE LAYER. HOWEVER THE ONSHORE GRADIENT IS RELATIVELY WEAK
COMPARED TO THE NORTHERLY GRADIENT AND THEREFORE WILL KEEP STRATUS AT
BAY UNTIL 05Z THIS EVENING OVER THE BAY AREA. LIGHT TO MODERATE WEST
WINDS WILL PERSIST THROUGH TONIGHT BECOMING LIGHT FROM THE SOUTHWEST
OVERNIGHT OVER MOST AREA TERMINALS.

VICINITY OF KSFO...VFR CONDITIONS WILL PERSIST THROUGH THIS EVENING
OVER BAY AREA TERMINALS. MVFR CIGS ANTICIPATED AROUND 05Z TONIGHT.
CLEARING EXPECTED AROUND 19Z WEDNESDAY MORNING. MODERATE AND GUSTY
WEST WINDS WILL EASE AFTER SUNSET TONIGHT BECOMING LIGHT OUT OF THE
WEST TO SOUTHWEST.

KSFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...MVFR TO IFR CIGS EXPECTED OVER AREA
TERMINALS THROUGH THE OVERNIGHT PERIOD. CLEARING EXPECTED AROUND 20Z-
21Z WEDNESDAY AFTERNOON. LIGHT WEST TO SOUTHWEST WINDS WILL PERSIST
THROUGH TONIGHT.

&&

.MARINE...AS OF 4:25 AM TUESDAY...NO MAJOR CHANGE FROM PREVIOUS
THINKING. LATEST COMPUTER MODELS STILL BRING A LONG PERIOD SWELL
TO CENTRAL AND NORTHERN CALIFORNIA WATERS BY MIDWEEK. SOUTHERLY
WAVES WILL START OUT AROUND 3 FEET AT 20-22 SECONDS IN OPEN WATER BUT
WILL EVENTUALLY PEAK BETWEEN 4 AND 5 FEET LATER IN THE WEEK. THE
BIGGEST IMPACT WILL BE AT SOUTH-FACING BEACHES. PLEASE SEE THE
SPECIAL WEATHER STATEMENT (SFOSPSMTR) FOR COMPLETE INFORMATION.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...GALE WARNING...PT ARENA TO PIGEON PT 10-60 NM
          ...SCA...PIGEON PT TO PT PIEDRAS BLANCAS 10-60 NM
                ...PT ARENA TO PT REYES 0-10 NM
                ...SF BAY

&&

PUBLIC FORECAST: RC
AVIATION/MARINE: CW