Small Craft Advisory 7, NWS JSJ

860 
WHCA72 TJSJ 110101
MWWSJU

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN JUAN PR
901 PM AST FRI FEB 10 2017

...CHOPPY SEAS ARE EXPECTED ACROSS THE ATLANTIC WATERS AND MONA
PASSAGE DURING THE UPCOMING WEEKEND AS A NORTHERLY SWELL WILL
INVADE THE AREA...

AMZ710-712-715-741-742-110915-
/O.CAN.TJSJ.SC.Y.0007.170212T0000Z-170213T1000Z/
/O.CON.TJSJ.SC.Y.0008.170212T0000Z-170213T1000Z/
ATLANTIC WATERS OF PUERTO RICO AND USVI FROM 10 NM TO 19.5N-
COASTAL WATERS OF NORTHERN PUERTO RICO OUT 10 NM-
COASTAL WATERS OF NORTHERN USVI AND CULEBRA OUT 10 NM-
MONA PASSAGE SOUTHWARD TO 17N-
COASTAL WATERS OF NORTHWESTERN PUERTO RICO OUT 10 NM-
901 PM AST FRI FEB 10 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 PM SATURDAY TO
6 AM AST MONDAY...

* WINDS...10 TO 15 KNOTS.

* WAVES/SEAS...6 TO 8 FEET WITH OCCASIONAL SEAS UP TO 10 FEET.

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.

&&

$$

Area Forecast Discussion
National Weather Service San Juan PR
203 PM AST Fri Feb 10 2017

.SYNOPSIS...A frontal boundary will cross through the area on
Monday bringing increasing clouds and shower chances area-wide
Sunday through late Tuesday. A warmer air mass will return
Wednesday through Thursday with no additional moisture.

At upper levels...The jet going over the ridge north of the area
last night will sink slowly south through the area Saturday night
as a trough approaches and then moves through on Sunday night. A
series of weak short waves will keep the trough close by until a
ridge moves over the area on Wednesday.

At mid levels...High pressure stretching east and west just north
of the area will continue through the weekend. High pressure will
retreat to the west as a weak trough deepens over the northeast
Caribbean Monday and moves into the tropical Atlantic on Tuesday.
Mid levels remain very dry except for moisture associated with
the frontal boundary Sunday night through Thursday. A shot of
moisture from the tropics is now being forecast to move into the
area the Saturday after next.

At lower levels...High pressure will move into the western
Atlantic ocean tonight pushing a front ahead of it. The front will
slow but finally cross through the area Sunday night with cooler
air and showers. The front will undergo considerable decay with
the moisture from the boundary remaining over the area through
mid-week next week.

&&

.DISCUSSION...The showers that crossed Saint Thomas and Culebra
are now just east of Fajardo and should dampen the eastern tip of
Puerto Rico before 3 PM AST. Showers have yet to form in southwest
Puerto Rico this afternoon, but are still possible. Amounts will
be light as showers move from the northeast. Showers may linger a
little after sunset over land today as a cold front approaches the
area and a pre-frontal boundary attempts to form over the area.
Although the moisture around the front is expected to increase,
models may be over-estimating the cloudiness both Saturday and
Sunday so have kept temperatures near persistence both days.
Currently the wettest day appears to be Monday with moisture and
clouds lingering through Wednesday. This is also the time period
that mid level moisture persists--beginning on Sunday night. Until
then mid levels beginning as low as 10 kft, are very dry and only
shallow convection will be able to form driven by surface
moisture and an adiabatic layer from 3500-6000 feet and capped by
a strong inversion.

&&

.AVIATION...Some MVFR CIGS are psbl at TNCM and TKPK in passing
SHRA otherwise VFR conditions will prevail through 12/02z. VCSH is
expected this afternoon at TJSJ, but TJMZ will likely remain VFR.
Brief mtn obscurations psbl in wrn PR til 11/02z and again aft
11/16z. sfc winds incrg aft 11/14z to bcm ENE at 10 to 18 kt.
Maximum winds by 11/18z btwn FL350-410 WSW to 90 kt.

&&

.MARINE...A northerly swell will invade the area Saturday night
and seas will become 7 feet in areas with exposure to the north
northwest. Most areas will subside to no more than 6 feet by
Monday morning. Outer Atlantic waters will take a little longer.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  75  85  74  84 /  10  10  50  50
STT  73  85  73  85 /  10  20  30  30

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...None.
VI...None.
AM...None.
&&

12/12

PERSPECTIVAS SOBRE CONDICIONES PELIGROSAS DEL TIEMPO
SERVICIO NACIONAL DE METEOROLOGIA SAN JUAN PR
548 AM AST VIERNES 10 DE FEBRERO DE 2017

AMZ710>745-PRZ001>013-111000-
SAN JUAN Y VECINDAD-NORESTE-SURESTE-ESTE INTERIOR-
NORTE CENTRAL-CENTRAL INTERIOR-PONCE Y VECINDAD-NOROESTE-
OESTE INTERIOR-MAYAGUEZ Y VECINDAD-SUROESTE-CULEBRA-VIEQUES-
AGUAS DEL ATLANTICO Y LAS AGUAS COSTERAS DEL CARIBE-
548 AM AST VIERNES 10 DE FEBRERO DE 2017

ESTA PERSPECTIVA SOBRE LAS CONDICIONES DEL TIEMPO PELIGROSAS ES
PARA PUERTO RICO Y LAS AGUAS COSTERAS ADYACENTES DEL ATLANTICO.

.DIA UNO...HOY Y ESTA NOCHE

.VIENTO...SE ESPERAN VIENTOS SOSTENIDOS EN EXCESO DE 20 MPH A
TRAVES DE LAS AGUAS COSTERAS DEL CUADRANTE NOROESTE DE PUERTO
RICO.

.OLAS...SE ESPERA OLEAJE ENTRE 4 Y 6 PIES A TRAVES DE LAS AGUAS
MAR AFUERA DEL ATLANTICO.

.CORRIENTES SUBMARINAS...EXISTE UN RIESGO MODERADO DE CORRIENTES
SUBMARINAS PARA LAS PLAYAS DEL ATLANTICO DEL NORTE DE PUERTO RICO
Y A TRAVES DEL ALGUNAS PLAYAS DEL ESTE DE PUERTO RICO.

.FUEGO...SE ESPERA UN AUMENTO EN EL PELIGRO DE FUEGO A TRAVES DE
LAS AREAS COSTERAS DEL SUR DE PUERTO RICO.

.DIAS DOS HASTA SIETE...SABADO A JUEVES

A MEDIDA QUE AIRE MAS SECO SE MUEVA A TRAVES DE LA REGION DURANTE
EL FIN DE SEMANA, EL RIESGO DE FUEGO PODRIA CONTINUAR AUMENTANDO.
ADEMAS, UNA MAREJADA DEL NORTE SE PRONOSTICA PARA EL DOMINGO. COMO
RESULTADO, UN RIESGO ALTO DE CORRIENTES SUBMARINAS ES PROBABLE A
LO LARGO DE LAS PLAYAS DEL NORTE DE PUERTO RICO.

.COMUNICADO SOBRE INFORMACION REPORTADA POR OBSERVADORES...

NO SE ANTICIPA ACTIVACION AMPLIA DE OBSERVADORES, SIN EMBARGO, SE
LES EXHORTA A LOS OBSERVADORES INDIVIDUALES A REPORTAR CORRIENTES
SUBMARINAS AL SERVICIO NACIONAL DE METEOROLOGIA EN SAN JUAN.

AMZ715-725-VIZ001-002-111000-
SAN TOMAS SAN JOHN E ISLAS ADYACENTES-
SANTA CRUZ-AGUAS CERCA DE LA COSTA DEL ATLANTICO Y AGUAS COSTERAS
ADYACENTES DEL CARIBE-
548 AM AST VIERNES 10 DE FEBRERO DE 2017

ESTA PERSPECTIVA SOBRE LAS CONDICIONES PELIGROSAS DEL TIEMPO ES PARA
LAS ISLAS VIRGENES AMERICANAS Y LAS AGUAS COSTERAS ADYACENTES.

.DIA UNO...HOY Y ESTA NOCHE

.OLEAJE...SE ESPERA OLEAJE PICADO Y PELIGROSO DE HASTA 6 PIES A
TRAVES DE LAS AGUAS MAR AFUERA DEL ATLANTICO.

.CORRIENTES SUBMARINAS...EXISTE UN RIESGO MODERADO DE CORRIENTES
SUBMARINAS PARA LAS PLAYAS DE SANTA CRUZ.

.DIAS DOS HASTA SIETE...SABADO A JUEVES

UNA MAREJADA DEL NORTE SE PRONOSTICA PARA EL DOMINGO. COMO
RESULTADO, UN RIESGO ALTO DE CORRIENTES SUBMARINAS ES PROBABLE A
LO LARGO DE LAS PLAYAS DEL NORTE.

.COMUNICADO SOBRE INFORMACION REPORTADA POR OBSERVADORES...

NO SE ANTICIPA ACTIVACION AMPLIA DE OBSERVADORES, SIN EMBARGO, SE
LES EXHORTA A LOS OBSERVADORES INDIVIDUALES A REPORTAR CORRIENTES
SUBMARINAS AL SERVICIO NACIONAL DE METEOROLOGIA EN SAN JUAN.