Coastal Flood Statement 2, NWS San Francisco Bay Area, CA

610 
WHUS46 KMTR 181419
CFWMTR

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
619 AM PST WED FEB 18 2015

KING TIDES WILL IMPACT THE COASTLINE AND WATERFRONTS WEDNESDAY MORNING
AND LASTING THROUGH THURSDAY EVENING.

THE SUN...MOON...AND EARTH ARE IN PROPER ALIGNMENT TO BRING THE
LARGEST TIDAL CYCLE OF THE SEASON WHICH WILL OCCUR OVER THE NEXT
FEW DAYS. THESE EXCESSIVE TIDES ARE OFTEN REFERRED AS KING TIDES
OR PERIGEAN SPRING TIDES AND WILL RESULT IN MINOR COASTAL
FLOODING OF LOW-LYING AREAS ALONG THE COAST AND BAY FRONTS DURING
PERIODS OF HIGH TIDE. COASTAL LOCATIONS THAT ARE TYPICALLY DRY
DURING HIGH TIDE...SUCH AS PARKING LOTS AND COASTAL TRAILS...MAY
BECOME SUBMERGED DUE TO THIS EXCESSIVE TIDAL CYCLE. DURING LOW
TIDES EXPECT STRONG RIP CURRENTS AT THE BEACHES AND LARGE
BREAKING WAVES NEAR HARBOR ENTRANCES.

CAZ506-508-510-191400-
/O.EXA.KMTR.CF.S.0002.000000T0000Z-150220T0500Z/
NORTH BAY INTERIOR VALLEYS-SAN FRANCISCO BAY SHORELINE-
EAST BAY INTERIOR VALLEYS-
619 AM PST WED FEB 18 2015

* COASTAL FLOODING...KING TIDES WILL IMPACT THE COASTLINE AND 
  WATERFRONTS.

* TIMING...EXCESSIVE HIGH TIDES ARE EXPECTED DURING THE MID TO 
  LATE MORNING HOURS OF FEBRUARY 17 THROUGH 19. EXTREME LOW 
  TIDES WILL OCCUR DURING THE LATE AFTERNOON TO EARLY EVENING 
  HOURS. THE EXACT TIMING OF TIDES IS LOCATION DEPENDENT SO 
  PLEASE VISIT TIDESANDCURRENTS.NOAA.GOV/TIDE_PREDICTIONS.HTML 

* LOCATIONS...LOW LYING AREAS ALONG THE IMMEDIATE COAST AND BAY 
  FRONT INCLUDING MARSHES AND SLOUGHS. THESE LOCATIONS MAY 
  INCLUDE PARKING LOTS...COASTAL TRAILS...SIDEWALKS...
  UNDERPASSES...AND ROADWAYS. 

* IMPACTS...SEA WATER ON ROADWAYS...PARKING LOTS...SIDEWALKS... 
  AND COASTAL TRAILS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...EXCESSIVE HIGH TIDES WILL
RESULT IN MINOR COASTAL FLOODING OF LOW AREAS ALONG THE SHORE. DO
NOT LEAVE YOUR VEHICLE IN LOW LYING PARKING LOTS NEAR THE COAST
OR BAY FRONT. DO NOT TRAVEL THROUGH FLOODED ROADWAYS. IF VISITING
THE COAST AVOID NARROW BEACHES AND COVES WHERE YOUR ENTRY AND OR
EXIT COULD BE BLOCKED BY RISING WATERS.

$$

CAZ006-505-509-529-530-191400-
/O.CON.KMTR.CF.S.0002.000000T0000Z-150220T0500Z/
SAN FRANCISCO-
COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE-
SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY-
SOUTHERN MONTEREY BAY AND BIG SUR COAST-
619 AM PST WED FEB 18 2015


* COASTAL FLOODING...KING TIDES WILL IMPACT THE COASTLINE AND 
  WATERFRONTS.

* TIMING...EXCESSIVE HIGH TIDES ARE EXPECTED DURING THE MID TO 
  LATE MORNING HOURS OF FEBRUARY 17 THROUGH 19. EXTREME LOW 
  TIDES WILL OCCUR DURING THE LATE AFTERNOON TO EARLY EVENING 
  HOURS. THE EXACT TIMING OF TIDES IS LOCATION DEPENDENT SO 
  PLEASE VISIT TIDESANDCURRENTS.NOAA.GOV/TIDE_PREDICTIONS.HTML 

* LOCATIONS...LOW LYING AREAS ALONG THE IMMEDIATE COAST AND BAY 
  FRONT INCLUDING MARSHES AND SLOUGHS. THESE LOCATIONS MAY 
  INCLUDE PARKING LOTS...COASTAL TRAILS...SIDEWALKS...
  UNDERPASSES...AND ROADWAYS. 

* IMPACTS...SEA WATER ON ROADWAYS...PARKING LOTS...SIDEWALKS... 
  AND COASTAL TRAILS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...EXCESSIVE HIGH TIDES WILL
RESULT IN MINOR COASTAL FLOODING OF LOW AREAS ALONG THE SHORE. DO
NOT LEAVE YOUR VEHICLE IN LOW LYING PARKING LOTS NEAR THE COAST
OR BAY FRONT. DO NOT TRAVEL THROUGH FLOODED ROADWAYS. IF VISITING
THE COAST AVOID NARROW BEACHES AND COVES WHERE YOUR ENTRY AND OR
EXIT COULD BE BLOCKED BY RISING WATERS.

$$


HTTP://WWW.WEATHER.GOV/SANFRANCISCO

470 
WHUS46 KMTR 191401
CFWMTR

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
601 AM PST THU FEB 19 2015

KING TIDES WILL IMPACT THE COASTLINE AND WATERFRONTS THROUGH THIS
EVENING.

THE SUN...MOON...AND EARTH ARE IN PROPER ALIGNMENT TO BRING THE
LARGEST TIDAL CYCLE OF THE SEASON WHICH WILL OCCUR OVER THE NEXT
FEW DAYS. THESE EXCESSIVE TIDES ARE OFTEN REFERRED AS KING TIDES
OR PERIGEAN SPRING TIDES AND WILL RESULT IN MINOR COASTAL
FLOODING OF LOW-LYING AREAS ALONG THE COAST AND BAY FRONTS DURING
PERIODS OF HIGH TIDE. COASTAL LOCATIONS THAT ARE TYPICALLY DRY
DURING HIGH TIDE...SUCH AS PARKING LOTS AND COASTAL TRAILS...MAY
BECOME SUBMERGED DUE TO THIS EXCESSIVE TIDAL CYCLE. DURING LOW
TIDES EXPECT STRONG RIP CURRENTS AT THE BEACHES AND LARGE
BREAKING WAVES NEAR HARBOR ENTRANCES.

CAZ006-505-506-508>510-529-530-200500-
/O.CON.KMTR.CF.S.0002.000000T0000Z-150220T0500Z/
SAN FRANCISCO-
COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE-
NORTH BAY INTERIOR VALLEYS-SAN FRANCISCO BAY SHORELINE-
SAN FRANCISCO PENINSULA COAST-EAST BAY INTERIOR VALLEYS-
NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST-
601 AM PST THU FEB 19 2015

* COASTAL FLOODING...KING TIDES WILL IMPACT THE COASTLINE AND 
  WATERFRONTS. 

* TIMING...EXCESSIVE HIGH TIDES ARE EXPECTED DURING THE MID TO 
  LATE MORNING HOURS OF FEBRUARY 17 THROUGH 19. EXTREME LOW 
  TIDES WILL OCCUR DURING THE LATE AFTERNOON TO EARLY EVENING 
  HOURS. THE EXACT TIMING OF TIDES IS LOCATION DEPENDENT SO 
  PLEASE VISIT TIDESANDCURRENTS.NOAA.GOV/TIDE_PREDICTIONS.HTML 

* LOCATIONS...LOW LYING AREAS ALONG THE IMMEDIATE COAST AND BAY 
  FRONT INCLUDING MARSHES AND SLOUGHS. THESE LOCATIONS MAY 
  INCLUDE PARKING LOTS...COASTAL TRAILS...SIDEWALKS... 
  UNDERPASSES...AND ROADWAYS. 

* IMPACTS...SEA WATER ON ROADWAYS...PARKING LOTS...SIDEWALKS... 
  AND COASTAL TRAILS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...EXCESSIVE HIGH TIDES WILL
RESULT IN MINOR COASTAL FLOODING OF LOW AREAS ALONG THE SHORE. DO
NOT LEAVE YOUR VEHICLE IN LOW LYING PARKING LOTS NEAR THE COAST
OR BAY FRONT. DO NOT TRAVEL THROUGH FLOODED ROADWAYS. IF VISITING
THE COAST AVOID NARROW BEACHES AND COVES WHERE YOUR ENTRY AND OR
EXIT COULD BE BLOCKED BY RISING WATERS.

$$


HTTP://WWW.WEATHER.GOV/SANFRANCISCO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
445 AM PST TUE FEB 17 2015

.SYNOPSIS...SLIGHTLY COOLER TEMPERATURES...PARTICULARLY AT THE
COAST...THROUGH MIDWEEK WITH NIGHT AND MORNING LOW CLOUDS. DRY
WEATHER TO CONTINUE THROUGH AT LEAST THE END OF THE WEEK.

&&

.DISCUSSION...AS OF 3:30 AM PST TUESDAY...WIDESPREAD STRATUS IS
BLANKETING THE AREA THIS MORNING. SFO SAC GRADIENT WENT ONSHORE
THIS AFTERNOON AND REACHED AS HIGH AS 1.8 MB WHILE THE LARGER WMC
GRADIENT REMAINS OFFSHORE. ONSHORE FLOW QUICKLY PUSHED LOW CLOUDS
THAT HAD BEEN DEVELOPING JUST OFFSHORE INTO SF AND MONTEREY BAYS
YESTERDAY AFTERNOON AND FURTHER INTO THE VALLEYS AS THE EVENING
PROGRESSED.

THE LOW CLOUDS WILL PREVENT AFTERNOON HIGHS FROM REACHING THE
LEVELS THEY HAD OVER THE HOLIDAY WEEKEND...ESPECIALLY ALONG THE
COAST WHERE SOME SPOTS MAY FAIL TO GET OUT OF THE 50S TODAY. AWAY
FROM THE COAST TEMPERATURES WILL STILL BE SEVERAL DEGREES WARMER
THAN NORMAL FOR MID FEBRUARY AS THE RIDGE MAINTAINS A WARMER
AIRMASS OVERHEAD. ONSHORE FLOW WILL CONTINUE FOR THE NEXT COUPLE
OF DAYS WITH NIGHT AND MORNING LOW CLOUDS THROUGH THURSDAY
MORNING.

LATE IN THE WEEK OFFSHORE FLOW LOOKS POSSIBLE AGAIN DRIVING
TEMPERATURES A FEW DEGREES WARMER. 850 MB TEMPERATURES REMAIN
COOLER HOWEVER SO THE RECORD BREAKING TEMPERATURES OF THIS HOLIDAY
WEEKEND ARE UNLIKELY TO BE REPEATED.

OVER THE WEEKEND MODELS ARE BECOMING CONSISTENT IN HAVING A
SHORTWAVE THAT RIDES OVER THE RIDGE SLIDE SOUTH INTO THE GREAT
BASIN. THIS WILL KEEP TEMPERATURES COOLER WITH LOWER HEIGHTS
HOWEVER MOISTURE IS LIMITED WITH THIS SYSTEM. AS AN INSIDE
SLIDER THE FEATURE LOOKS TO STAY EAST OF THE CWA AS IT DROPS
FURTHER SOUTH INTO SOUTHERN CALIFORNIA SO THAT ANY PRECIP THAT
MAY OCCUR SHOULD STAY OUT OF THE FORECAST AREA.

THE EXTENDED FORECAST CONTINUES TO CALL FOR DRY WEATHER WITH ABOVE
NORMAL TEMPERATURES INTO NEXT WEEK. THE GLOBAL MODELS WEAKEN THE
RIDGE TOWARD THE MIDDLE OF NEXT WEEK ALLOWING SHORTWAVE ENERGY
INTO THE PACIFIC NORTHWEST WHILE KEEPING ALL MOISTURE NORTH OF
CALIFORNIA. NAEFS ENSEMBLE SPREAD SHOWS A RAPID INCREASE AT THIS
TIME RANGE HOWEVER.

&&

.AVIATION...AS OF 4:30 AM PST TUESDAY...IMPRESSIVE STRATUS
PUSH INTO THE SFO BAY AREA THIS MORNING EXTENDING INTO KSAC.
GFS MODEL SUGGESTS A MID AFTERNOON BURNOFF FOR THE SFO BAY AREA
WHILE THE NAM AND LAMP GUIDANCE INDICATING RISING CIGS TO MVFR BUT
NO CLEARING. LIGHT WINDS AND LOW SUN ANGLE FOR THIS TIME OF YEAR
SUPPORTS THE NAM AND LAMP. LATEST FORECAST IS FOR SOME CLEARING
TO SCT CLOUDS BY MID-AFTERNOON BUT WOULD NOT BE SURPRISED TO SEE
CIGS STAY IN ALL DAY.

VICINITY OF KSFO...IFR CIGS IMPROVING TO MVFR CIGS AFTER 19Z.
VFR FOR SCT CLOUDS AFTER 22Z BUT CONFIDENCE ON THIS IS NOT HIGH AS
CIGS COULD REMAIN ALL DAY OR VFR CONDITIONS COULD BE VERY SHORT-
LIVED. ONSHORE WINDS TO 10 KT IN THE AFTERNOON.

KSFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...IFR CIGS IMPROVING TO MVFR AFTER
18Z. SOME BRIEF AFTERNOON CLEARING AT SNS BUT CIGS REMAINING AT MRY.

&&

.MARINE...AS OF 4:30 AM PST TUESDAY...HIGH PRESSURE OVER THE
NORTHERN GREAT BASIN WILL MOVE EAST TONIGHT AS ANOTHER HIGH BUILDS
OFF THE OREGON COAST. LIGHT SOUTH WINDS WILL TURN TO NORTHWEST
TONIGHT THROUGH FRIDAY. A LOW PRESSURE SYSTEM WILL DEVELOP OVER
THE SIERRAS SATURDAY WHICH MAY RESULT IN A STRONGER NORTH TO
NORTHEAST FLOW.

&&

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

PUBLIC FORECAST: AC
AVIATION: W PI
MARINE: MM/CANEPA

VISIT US AT WEATHER.GOV/SANFRANCISCO

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