Small Craft Advisory 7, NWS JSJ

526 
WHCA72 TJSJ 302058
MWWSJU

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN JUAN PR
458 PM AST FRI JAN 30 2015

...HAZARDOUS SEAS ACROSS THE OFFSHORE ATLANTIC WATERS...

.A COMBINATION OF WIND WAVES AND NORTH NORTHWEST SWELLS WILL
AFFECT THE ATLANTIC OFFSHORE WATERS THROUGH EARLY SATURDAY
MORNING WITH SEAS UP TO 7 FEET.

AMZ710-310500-
/O.CON.TJSJ.SC.Y.0007.000000T0000Z-150131T1000Z/
ATLC WATERS OF PUERTO RICO AND USVI FROM 10NM TO 19.5N-
458 PM AST FRI JAN 30 2015

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM AST
SATURDAY...

* WINDS...EAST NORTHEAST 11 TO 16 KNOTS.

* WAVES/SEAS...5 TO 7 FEET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WINDS OF 22 TO 33 KNOTS AND/OR
SEAS OF 7 FEET AND GREATER ARE EXPECTED TO PRODUCE HAZARDOUS
MARINE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS...
ESPECIALLY THOSE OPERATING SMALLER VESSELS...SHOULD AVOID
NAVIGATING IN THESE CONDITIONS.

&&

$$

030 
WHCA72 TJSJ 310217
MWWSJU

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN JUAN PR
1017 PM AST FRI JAN 30 2015

...HAZARDOUS SEAS ACROSS THE OFFSHORE ATLANTIC WATERS...

.A COMBINATION OF WIND WAVES AND NORTH NORTHWEST SWELLS WILL
AFFECT THE ATLANTIC OFFSHORE WATERS THROUGH EARLY SATURDAY
MORNING WITH SEAS UP TO 7 FEET.

AMZ710-311000-
/O.CON.TJSJ.SC.Y.0007.000000T0000Z-150131T1000Z/
ATLC WATERS OF PUERTO RICO AND USVI FROM 10NM TO 19.5N-
1017 PM AST FRI JAN 30 2015

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM AST
SATURDAY...

* WINDS...EAST NORTHEAST 11 TO 16 KNOTS.

* WAVES/SEAS...5 TO 7 FEET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WINDS OF 22 TO 33 KNOTS AND/OR
SEAS OF 7 FEET AND GREATER ARE EXPECTED TO PRODUCE HAZARDOUS
MARINE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS...
ESPECIALLY THOSE OPERATING SMALLER VESSELS...SHOULD AVOID
NAVIGATING IN THESE CONDITIONS.

&&

$$

787 
WHCA72 TJSJ 310825
MWWSJU

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN JUAN PR
425 AM AST SAT JAN 31 2015

...LOCAL MARINE CONDITIONS TO START DETERIORATING LATE TONIGHT...

.NORTHWESTERLY SWELL WILL INVADE THE LOCAL WATERS AND CAUSE HAZARDOUS
SEAS ACROSS THE OFFSHORE ATLANTIC WATERS STARTING LATE TONIGHT.

AMZ710-311630-
/O.CAN.TJSJ.SC.Y.0007.000000T0000Z-150131T1000Z/
/O.NEW.TJSJ.SC.Y.0008.150201T0400Z-150204T1000Z/
ATLC WATERS OF PUERTO RICO AND USVI FROM 10NM TO 19.5N-
425 AM AST SAT JAN 31 2015

...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM
AST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A SMALL CRAFT
ADVISORY...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM AST
WEDNESDAY.

* WINDS...EAST NORTHEAST 15 TO 20 KNOTS.

* WAVES/SEAS...5 TO 7 FEET ON SUNDAY...UP TO 8 FEET ON MONDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WINDS OF 22 TO 33 KNOTS AND/OR
SEAS OF 7 FEET AND GREATER ARE EXPECTED TO PRODUCE HAZARDOUS
MARINE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS...
ESPECIALLY THOSE OPERATING SMALLER VESSELS...SHOULD AVOID
NAVIGATING IN THESE CONDITIONS.

&&

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
1211 PM AST FRI JAN 30 2015

.UPDATE...SHOWERS AND COOLER AIR IN THE SEA BREEZE WILL KEEP
TEMPERATURES A DEGREE OR TWO COOLER TODAY ON THE NORTH COAST OF
PUERTO RICO. SHOWERS ARE STILL EXPECTED OVER INTERIOR AND
SOUTHWESTERN PUERTO RICO...BUT STRONG WINDS ABOVE 20 KFT AND DRIER
AIR AT MID LEVELS...WILL LIKELY PREVENT THUNDERSTORMS FROM FORMING
THIS AFTERNOON. SHOWERS WILL DECREASE IN THE ONSHORE FLOW DURING
THE AFTERNOON ALONG THE COASTS. LATEST SOUNDING FROM 30/12Z SHOWS
MODESTLY INCREASING PRECIPITABLE WATER...NOW AT 1.64 INCHES.

&&

.AVIATION...VFR CONDS WILL PREVAIL AT ALL TAF SITES WITH VERY
BRIEF MVFR IN SHRA...AND SOME MTN OBSCURATIONS IN PR. WINDS
EASTERLY UP TO 12 KNOTS BLO 5 KFT. LIGHT AND VARIABLE UP TO 15
KFT. WINDS AT 38 KFT WERE MEASURED AT 100 KT FROM THE WEST.

&&

.MARINE...SEAS AT BUOY 41043 ARE UP TO 9.2 FEET WITH 6.2 FEET OF
SWELL FROM THE NNW. SUSTAINED NORTHEAST WINDS DURING THE LAST 6
HOURS AT THE SAME BUOY HAVE BEEN RUNNING 18 TO 21 KNOTS. THEREFORE
WE WILL ISSUE SMALL CRAFT ADVISORIES FOR THE NORTHERN PORTION OF
THE OUTER ATLANTIC WATERS SHORTLY.

&&

.PREV DISCUSSION... /ISSUED 558 AM AST FRI JAN 30 2015/

SYNOPSIS...AS TROUGH ALOFT MOVES EAST TODAY AND INTO SATURDAY...
A MID TO UPPER LEVEL RIDGE WILL BUILD FROM THE WEST AND HOLD
ACROSS THE FORECAST AREA MUCH OF THE NEXT WEEK. INDUCED SURFACE
TROUGH ASSOCIATED WITH A SHEAR-LINE NORTH OF THE AREA WILL CONTINUE
TO ENHANCE SHOWER ACTIVITY ACROSS THE AREA TODAY.

DISCUSSION...VARIABLY CLOUDY SKIES PREVAILED OVERNIGHT ACROSS THE
LOCAL ISLANDS...WITH FREQUENT PASSING SHOWERS NOTED ACROSS THE
NORTH AND EAST COASTAL AREAS OF PR...USVI AS WELL AS LOCAL WATERS.
WINDS WERE LIGHT FROM THE NORTHEAST WITH COASTAL TEMPERATURES IN
THE MID TO LOW 70S.

THE LOCAL ISLANDS WILL CONTINUE UNDER THE INFLUENCE OF A MID TO
UPPER LEVEL TROUGH WHICH WILL INTERACT WITH AN INDUCED SURFACE
TROUGH AND ASSOCIATED MOISTURE TO PRODUCE CLOUDINESS...SHOWERS AND
THUNDERSTORMS POSSIBLE ACROSS PORTIONS OF THE LOCAL ISLANDS. UNDER
THE PREVAILING NORTHEASTERLY WIND FLOW...EXPECT THE CONTINUED TREND
OF PASSING SHOWERS ACROSS THE NORTH AND EAST COASTAL SECTIONS OF
THE ISLANDS THROUGH THE DAY WITH AFTERNOON CONVECTION ACROSS
SOUTHWEST PUERTO RICO. SOME OF THE AFTERNOON SHOWERS MAY BECOME
STRONG ENOUGH TO PRODUCE LOCALLY HEAVY RAINFALL...GUSTY WINDS AND
LIGHTING. URBAN AND SMALL STREAM FLOODING WILL NOT BE RULED OUT.

TROUGH BEGINS TO LIFT OUT SATURDAY WITH RIDGE OF HIGH PRESSURE
GRADUALLY STRENGTHENING. THIS FEATURE AND ASSOCIATED SUBSIDENCE
CAP COMBINED WITH NEAR NORMAL PRECIPITABLE WATER WILL RESULT IN A
GENERALLY FAIR AND MAINLY STABLE WEATHER PATTERN MUCH OF NEXT
WEEK. HOWEVER...EARLY MORNING SHOWERS ACROSS WINDWARD AREAS AS
WELL AS LIMITED AFTERNOON CONVECTION OVER WEST PUERTO RICO CANT BE
RULED OUT EACH DAY. THE BEST CHANCE OF SHOWER ACTIVITY NEXT WEEK
IS SUNDAY AND MONDAY WITH A SHARP DECREASE TUESDAY AND INTO THE
END OF THE WORKWEEK.

AVIATION...SHRA MOVING IN FROM THE NORTH WILL CAUSE VCSH...AND
BRIEF SHRA AT THE STATIONS ACROSS THE USVI AND THE NORTHERN PR
TERMINALS IN THE MORNING. SHRA MAY REACH TNCM AFT 30/08Z BUT DRIER
AIR REMAINS OVER TKPK. ISOLD TSRA ACROSS THE LOCAL WATERS TO THE
NNW OF PR ALONG SHEAR-LINE...AFTERNOON ISOLD TSRA IN OR AROUND
TJMZ/TJPS/TJBQ AFTER 30/18Z. EXPECT MTN OBSCURATIONS AND CIGS NEAR
FL-040. SFC WIND SPEEDS SHOULD REMAIN BELOW 15 KT TODAY EXCEPT
GUSTY NEAR THE SHRA.

MARINE...INDUCED SURFACE TROUGH ASSOCIATED WITH SHEAR-LINE NORTH OF
THE AREA WILL CONTINUE TO PRODUCE A GENTLE TO MODERATE NORTHEASTERLY
WIND FLOW WITH PASSING SHOWERS ACROSS THE LOCAL AREA THROUGH THE
DAY. HIGH PRESSURE THEN BUILDS ACROSS THE REGION SATURDAY AND
EARLY NEXT WEEK WITH TRADE WINDS STRENGTHENING. A NEW PULSE OF
NORTHWESTERLY SWELLS IS EXPECTED TO INVADE THE LOCAL WATERS EARLY
NEXT WEEK. SEAS UP TO 6 FEET THRU LATE SATURDAY NIGHT.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  82  73  83  75 /  30  20  50  50
STT  84  76  84  77 /  40  20  50  50

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...NONE.
VI...NONE.
COASTAL WATERS...NONE.
&&

13/12

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN JUAN PR
551 AM AST FRI JAN 30 2015

AMZ710>745-PRZ001>013-311100-
SAN JUAN AND VICINITY-NORTHEAST-SOUTHEAST-EASTERN INTERIOR-
NORTH CENTRAL-CENTRAL INTERIOR-PONCE AND VICINITY-NORTHWEST-
WESTERN INTERIOR-MAYAGUEZ AND VICINITY-SOUTHWEST-CULEBRA-VIEQUES-
THE NEARSHORE AND OFF SHORE ATLANTIC AND CARIBBEAN COASTAL WATERS-
551 AM AST FRI JAN 30 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT
ATLANTIC COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT

DEEP POLAR TROUGH PATTERN WILL REMAIN IN PLACE THROUGH SATURDAY
AND MAINTAIN UNSETTLED CONDITIONS WITH THE RISK OF SHOWERS AND
THUNDERSTORMS. THESE THUNDERSTORMS WILL MOVE SLOWLY AND MAY PRODUCE
LOCALLY HEAVY RAINFALL AND FREQUENT LIGHTNING. THERE IS ALSO A
MODERATE RISK OF RIP CURRENTS ACROSS THE NORTH COAST OF MAINLAND PUERTO
RICO AND CULEBRA.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THE UPPER TROUGH WILL MAINTAIN UNSETTLED CONDITIONS WITH THE RISK
OF SHOWERS AND MAYBE A THUNDERSTORM. LOCALLY HEAVY RAINFALL ACROSS
THE INTERIOR...WESTERN...AND SOUTHWESTERN SECTIONS OF PUERTO RICO CANNOT
BE RULED OUT AT THIS TIME FOR SATURDAY INTO EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

ANY REPORTS OF HAZARDOUS WEATHER OR IMPACTS WILL BE APPRECIATED.

AMZ715-725-VIZ001-002-311100-
ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX-
NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS-
551 AM AST FRI JAN 30 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE
ADJACENT COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT

THERE IS A MODERATE RISK OF RIP CURRENTS ACROSS THE NORTH COASTS
OF SAINT THOMAS AND SAINT JOHN.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.