Coastal Waters Forecast
Issued by NWS San Juan, PR

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000
FZCA52 TJSJ 280830
CWFSJU

COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE SAN JUAN PR
430 AM AST FRI APR 28 2017

PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS

SEAS ARE PROVIDED AS A RANGE OF THE AVERAGE HEIGHT OF THE
HIGHEST 1/3 OF THE SEAS...ALONG WITH THE OCCASIONAL HEIGHT
OF THE AVERAGE HIGHEST 10 PERCENT OF THE SEAS.

AMZ700-282130-
430 AM AST FRI APR 28 2017

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
A STRONG SURFACE HIGH PRESSURE ACROSS THE NORTH CENTRAL ATLANTIC
WILL MOVE SLOWLY SOUTH AND EXTEND INTO THE WESTERN ATLANTIC THROUGH
THE WEEKEND, THEN PERSIST NORTH OF THE AREA THROUGH THE MIDDLE OF
NEXT WEEK. THIS WILL PROMOTE MODERATE TO LOCALLY FRESH TRADE WINDS
THROUGH THE FORECAST PERIOD. SEAS WILL GRADUALLY INCREASE DURING THE
WEEKEND IN RESPONSE TO THE TIGHTENING OF THE PRESSURE GRADIENT ACROSS
THE ATLANTIC WATERS.

$$

AMZ710-282130-
ATLANTIC WATERS OF PUERTO RICO AND USVI FROM 10 NM TO 19.5N-
430 AM AST FRI APR 28 2017

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
SHOWERS.
.TONIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS.
.SATURDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS.
.SATURDAY NIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 5 TO 7 FEET WITH
OCCASIONAL SEAS UP TO 9 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
.SUNDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 5 TO 7 FEET WITH
OCCASIONAL SEAS UP TO 9 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
THUNDERSTORMS. SCATTERED SHOWERS.
.MONDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 5 TO 7 FEET WITH
OCCASIONAL SEAS UP TO 9 FEET. DOMINANT PERIOD 12 SECONDS.
NORTHEAST SWELL 4 TO 6 FEET. ISOLATED SHOWERS, THEN ISOLATED
THUNDERSTORMS.
.TUESDAY...EAST WINDS 10 TO 15 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 11 SECONDS.
NORTHEAST SWELL 4 TO 5 FEET. ISOLATED THUNDERSTORMS, THEN ISOLATED
SHOWERS.

$$

AMZ712-282130-
COASTAL WATERS OF NORTHERN PUERTO RICO OUT 10 NM-
430 AM AST FRI APR 28 2017

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
SHOWERS.
.TONIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS.
.SATURDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS IN THE MORNING, THEN ISOLATED THUNDERSTORMS IN THE
AFTERNOON.
.SATURDAY NIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
.SUNDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
.MONDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 11 SECONDS.
NORTHEAST SWELL 4 TO 5 FEET. ISOLATED SHOWERS, THEN ISOLATED
THUNDERSTORMS.
.TUESDAY...EAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 11 SECONDS.
NORTHEAST SWELL AROUND 4 FEET. ISOLATED THUNDERSTORMS. SCATTERED
SHOWERS.

$$

AMZ715-282130-
COASTAL WATERS OF NORTHERN USVI AND CULEBRA OUT 10 NM-
430 AM AST FRI APR 28 2017

.TODAY...EAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
SHOWERS.
.TONIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS.
.SATURDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS.
.SATURDAY NIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
.SUNDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
.MONDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 11 SECONDS.
NORTHEAST SWELL 4 TO 5 FEET. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS.
.TUESDAY...EAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 10 SECONDS.
NORTHEAST SWELL AROUND 4 FEET. ISOLATED THUNDERSTORMS. SCATTERED
SHOWERS.

$$

AMZ722-282130-
ANEGADA PASSAGE SOUTHWARD TO 17N-
430 AM AST FRI APR 28 2017

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...EAST WINDS 15 TO 20 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
SHOWERS.
.TONIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS.
.SATURDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS.
.SATURDAY NIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
.SUNDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
.MONDAY...EAST WINDS 10 TO 15 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 12 SECONDS.
NORTHEAST SWELL 4 TO 5 FEET. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS.
.TUESDAY...EAST WINDS 10 TO 15 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 11 SECONDS.
NORTHEAST SWELL 4 TO 5 FEET. ISOLATED THUNDERSTORMS. SCATTERED
SHOWERS.

$$

AMZ725-282130-
COASTAL WATERS OF SOUTHERN USVI VIEQUES AND EASTERN PUERTO RICO OUT
10 NM-
430 AM AST FRI APR 28 2017

.TODAY...EAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS.
.TONIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS.
.SATURDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS.
.SATURDAY NIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
.SUNDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
.MONDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 12 SECONDS. EAST
SWELL 4 TO 5 FEET. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.
.TUESDAY...EAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 11 SECONDS. EAST
SWELL AROUND 4 FEET. ISOLATED THUNDERSTORMS. SCATTERED SHOWERS.

$$

AMZ732-282130-
CARIBBEAN WATERS OF PUERTO RICO FROM 10 NM TO 17N-
430 AM AST FRI APR 28 2017

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
SHOWERS.
.TONIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS.
.SATURDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS.
.SATURDAY NIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
.SUNDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
.MONDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 12 SECONDS.
NORTHEAST SWELL 4 TO 5 FEET. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS.
.TUESDAY...EAST WINDS 10 TO 15 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 12 SECONDS.
NORTHEAST SWELL AROUND 4 FEET. ISOLATED THUNDERSTORMS. SCATTERED
SHOWERS.

$$

AMZ735-282130-
COASTAL WATERS OF SOUTHERN PUERTO RICO OUT 10 NM-
430 AM AST FRI APR 28 2017

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...EAST WINDS 15 TO 20 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS.
.TONIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
SHOWERS THROUGH THE NIGHT.
.SATURDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
SHOWERS.
.SATURDAY NIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
THUNDERSTORMS.
.SUNDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
.MONDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 2 TO 4 FEET WITH
OCCASIONAL SEAS UP TO 5 FEET. DOMINANT PERIOD 8 SECONDS. SCATTERED
SHOWERS. ISOLATED THUNDERSTORMS.
.TUESDAY...EAST WINDS 10 TO 15 KNOTS. SEAS 2 TO 4 FEET WITH
OCCASIONAL SEAS UP TO 5 FEET. DOMINANT PERIOD 10 SECONDS. ISOLATED
THUNDERSTORMS, THEN ISOLATED SHOWERS.

$$

AMZ741-282130-
MONA PASSAGE SOUTHWARD TO 17N-
430 AM AST FRI APR 28 2017

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...EAST WINDS 15 TO 20 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS THROUGH THE DAY. ISOLATED THUNDERSTORMS IN THE AFTERNOON.
.TONIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
SHOWERS THROUGH THE NIGHT.
.SATURDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
SHOWERS IN THE MORNING.
.SATURDAY NIGHT...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
THUNDERSTORMS.
.SUNDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
THUNDERSTORMS. SCATTERED SHOWERS.
.MONDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET WITH
OCCASIONAL SEAS UP TO 8 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
SHOWERS.
.TUESDAY...EAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 10 SECONDS.
NORTHEAST SWELL AROUND 4 FEET. ISOLATED SHOWERS.

$$

AMZ742-282130-
COASTAL WATERS OF NORTHWESTERN PUERTO RICO OUT 10 NM-
430 AM AST FRI APR 28 2017

.TODAY...EAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 8 SECONDS. NUMEROUS
SHOWERS THROUGH THE DAY. SCATTERED THUNDERSTORMS IN THE AFTERNOON.
.TONIGHT...EAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 7 SECONDS.
.SATURDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
THUNDERSTORMS IN THE AFTERNOON.
.SATURDAY NIGHT...EAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
SHOWERS THROUGH THE NIGHT.
.SUNDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
THUNDERSTORMS. SCATTERED SHOWERS.
.MONDAY...EAST WINDS 10 TO 15 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 10 SECONDS. ISOLATED
THUNDERSTORMS, THEN ISOLATED SHOWERS.
.TUESDAY...EAST WINDS 5 TO 10 KNOTS. SEAS 3 TO 5 FEET WITH
OCCASIONAL SEAS UP TO 6 FEET. DOMINANT PERIOD 10 SECONDS. ISOLATED
THUNDERSTORMS. SCATTERED SHOWERS.

$$

AMZ745-282130-
COASTAL WATERS OF SOUTHWESTERN PUERTO RICO OUT 10 NM-
430 AM AST FRI APR 28 2017

.TODAY...EAST WINDS 10 TO 15 KNOTS. SEAS 2 TO 4 FEET WITH
OCCASIONAL SEAS UP TO 5 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
SHOWERS THROUGH THE DAY. ISOLATED THUNDERSTORMS IN THE AFTERNOON.
.TONIGHT...EAST WINDS 10 TO 15 KNOTS. SEAS 2 TO 4 FEET WITH
OCCASIONAL SEAS UP TO 5 FEET. DOMINANT PERIOD 7 SECONDS.
.SATURDAY...EAST WINDS 10 TO 15 KNOTS. SEAS 2 TO 4 FEET WITH
OCCASIONAL SEAS UP TO 5 FEET. DOMINANT PERIOD 7 SECONDS. SCATTERED
THUNDERSTORMS IN THE AFTERNOON.
.SATURDAY NIGHT...EAST WINDS 10 TO 15 KNOTS. SEAS 2 TO 4 FEET WITH
OCCASIONAL SEAS UP TO 5 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
SHOWERS THROUGH THE NIGHT.
.SUNDAY...EAST WINDS 15 TO 20 KNOTS. SEAS 2 TO 4 FEET WITH
OCCASIONAL SEAS UP TO 5 FEET. DOMINANT PERIOD 7 SECONDS. ISOLATED
THUNDERSTORMS. SCATTERED SHOWERS.
.MONDAY...EAST WINDS 10 TO 15 KNOTS. SEAS 1 TO 3 FEET. DOMINANT
PERIOD 7 SECONDS. ISOLATED THUNDERSTORMS, THEN ISOLATED SHOWERS.
.TUESDAY...EAST WINDS 10 TO 15 KNOTS. SEAS 1 TO 3 FEET. DOMINANT
PERIOD 7 SECONDS. ISOLATED SHOWERS.

$$



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