

331 

FZCA52 TJSJ 211612

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

1212 PM AST Fri Aug 21 2020



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.



AMZ700-220430-

1212 PM AST Fri Aug 21 2020



.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...

Tropical Storm conditions are expected across the local waters later

tonight through Saturday as Tropical Storm Laura moves across the 

area. Hazardous seas and life-threatening conditions are expected.



$$



AMZ710-220430-

Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-

1212 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TODAY...Northeast winds 15 to 20 knots with gusts to

around 30 knots. Seas 3 to 5 feet with occasional seas up to 6

feet. Dominant period 8 seconds. Scattered showers through the

day. Isolated thunderstorms in the afternoon.

.TONIGHT... Tropical storm conditions expected. Northeast winds 20

to 25 knots with gusts to around 35 knots becoming east 30 to 35

knots with gusts to around 45 knots after midnight. Seas 5 to 7

feet with occasional seas up to 9 feet building to 12 to 14 feet

with occasional seas up to 17 feet after midnight. Dominant period

10 seconds. North swell 4 to 6 feet after midnight. Numerous

showers and isolated thunderstorms.

.SATURDAY... Tropical storm conditions expected. Southeast winds

35 to 40 knots with gusts to around 55 knots. Seas 12 to 14 feet

with occasional seas up to 17 feet. Dominant period 10 seconds.

Northeast swell 4 to 6 feet. Showers and scattered thunderstorms.

.SATURDAY NIGHT... Tropical storm conditions possible. Southeast

winds 20 to 25 knots with gusts to around 35 knots. Seas 10 to 12

feet with occasional seas up to 14 feet. Dominant period 10

seconds. Northeast swell 4 to 5 feet. Showers and scattered

thunderstorms.

.SUNDAY...East winds 15 to 20 knots with gusts to around 30 knots.

Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant

period 10 seconds. East swell around 4 feet. Isolated showers in

the morning, then isolated thunderstorms in the afternoon.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 8 seconds. Isolated

showers.

.MONDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 seconds. Scattered

showers.

.MONDAY NIGHT...East winds 10 to 15 knots with gusts to around 25

knots. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 7 seconds. Scattered showers and isolated

thunderstorms.

.TUESDAY...East winds 10 to 15 knots. Gusts up to 25 knots in the

morning. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 7 seconds. Scattered showers.



$$



AMZ712-220430-

Coastal Waters of Northern Puerto Rico out 10 NM-

1212 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TODAY...Northeast winds 10 to 15 knots. Gusts up to 25

knots in the afternoon. Seas 2 to 4 feet with occasional seas up

to 5 feet. Dominant period 8 seconds. Scattered showers through

the day. Isolated thunderstorms in the afternoon.

.TONIGHT...Northeast winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 seconds. Numerous

showers and scattered thunderstorms.

.SATURDAY... Tropical storm conditions expected. East winds 40 to

45 knots veering southeast 35 to 40 knots in the afternoon. Gusts

up to 60 knots. Seas 4 to 6 feet with occasional seas up to 8

feet. Dominant period 8 seconds. Showers and scattered

thunderstorms.

.SATURDAY NIGHT...Southeast winds 15 to 20 knots. Seas 5 to 7 feet

with occasional seas up to 9 feet. Dominant period 10 seconds.

Showers and scattered thunderstorms.

.SUNDAY...East winds 15 to 20 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 10 seconds.

Scattered showers through the day. Isolated thunderstorms in the

afternoon.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 10 seconds. Isolated

showers.

.MONDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Scattered

showers.

.MONDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Scattered

showers and isolated thunderstorms.

.TUESDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Isolated

thunderstorms.



$$



AMZ715-220430-

Coastal Waters of Northern USVI and Culebra out 10 NM-

1212 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TODAY...Northeast winds 15 to 20 knots with gusts to

around 30 knots. Seas 2 to 4 feet with occasional seas up to 5

feet. Dominant period 8 seconds. Scattered showers through the

day. Isolated thunderstorms in the afternoon.

.TONIGHT... Tropical storm conditions expected. Northeast winds 20

to 25 knots rising to 40 to 45 knots with gusts to around 60 knots

after midnight. Seas 4 to 6 feet with occasional seas up to 8

feet. Dominant period 10 seconds. Showers and scattered

thunderstorms.

.SATURDAY... Tropical storm conditions expected. Southeast winds

35 to 40 knots with gusts to around 55 knots easing to 20 to 25

knots with gusts to around 35 knots in the afternoon. Seas 5 to 7

feet with occasional seas up to 9 feet. Dominant period 10

seconds. Showers and scattered thunderstorms.

.SATURDAY NIGHT... Tropical storm conditions possible. Southeast

winds 20 to 25 knots with gusts to around 35 knots becoming east

after midnight. Seas 4 to 6 feet with occasional seas up to 8

feet. Dominant period 10 seconds. Showers and scattered

thunderstorms.

.SUNDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 8 seconds. Isolated

showers.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Isolated

showers.

.MONDAY...Northeast winds 10 to 15 knots. Gusts up to 25 knots in

the morning. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 7 seconds. Scattered showers.

.MONDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Scattered

showers and isolated thunderstorms.

.TUESDAY...Southeast winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Scattered

showers and isolated thunderstorms.



$$



AMZ722-220430-

Anegada Passage Southward to 17N-

1212 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TODAY...Northeast winds 15 to 20 knots with gusts to around

30 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. 

Dominant period 8 seconds. Scattered showers through the day. 

Isolated thunderstorms in the afternoon.

.TONIGHT... Tropical storm conditions expected. Northeast winds 35

to 40 knots veering southeast after midnight. Gusts up to 55

knots. Seas 8 to 10 feet with occasional seas up to 13 feet.

Dominant period 10 seconds. Northeast swell 4 to 5 feet after

midnight. Showers and scattered thunderstorms.

.SATURDAY... Tropical storm conditions possible. Southeast winds

20 to 25 knots with gusts to around 40 knots. Seas 10 to 12 feet

with occasional seas up to 14 feet. Dominant period 10 seconds.

Northeast swell 4 to 5 feet. Showers and scattered thunderstorms.

.SATURDAY NIGHT... Tropical storm conditions possible. East winds

20 to 25 knots. Seas 6 to 8 feet with occasional seas up to 10

feet. Dominant period 8 seconds. Northeast swell around 4 Feet.

Scattered thunderstorms in the evening. Scattered showers through

the night.

.SUNDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 7 seconds. Isolated

showers.

.SUNDAY NIGHT...East winds 15 to 20 knots with gusts to around 30

knots. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 7 seconds. Isolated showers.

.MONDAY...Northeast winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 seconds. Scattered

showers.

.MONDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 seconds. Scattered

showers.

.TUESDAY...Southeast winds 10 to 15 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 6 seconds. Isolated

thunderstorms in the morning. Scattered showers through the day.



$$



AMZ725-220430-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

1212 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TODAY...Northeast winds 15 to 20 knots. Seas 2 to 4 feet

with occasional seas up to 5 feet. Dominant period 8 seconds.

Scattered showers through the day. Isolated thunderstorms in the

afternoon.

.TONIGHT... Tropical storm conditions expected. Northeast winds 15

to 20 knots with gusts to around 30 knots rising to 35 to 40 knots

with gusts to around 55 knots after midnight. Seas 6 to 8 feet

with occasional seas up to 10 feet. Dominant period 10 seconds.

Showers and scattered thunderstorms.

.SATURDAY... Tropical storm conditions expected. Southeast winds

40 to 45 knots with gusts to around 60 knots easing to 20 to 25

knots with gusts to around 35 knots in the afternoon. Seas 8 to 10

feet with occasional seas up to 11 feet. Dominant period 10

seconds. East swell around 4 feet. Showers and scattered

thunderstorms.

.SATURDAY NIGHT... Tropical storm conditions possible. Southeast

winds 20 to 25 knots with gusts to around 35 knots becoming east

with gusts to around 25 knots after midnight. Seas 6 to 8 feet

with occasional seas up to 10 feet. Dominant period 10 seconds.

Northeast swell around 4 feet in the evening. Showers and

scattered thunderstorms.

.SUNDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 8 seconds. Isolated

showers.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 seconds. Scattered

showers.

.MONDAY...Northeast winds 10 to 15 knots. Gusts up to 25 knots in

the morning. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 7 seconds. Scattered showers.

.MONDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Scattered

showers and isolated thunderstorms.

.TUESDAY...Southeast winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Scattered

showers and isolated thunderstorms.



$$



AMZ732-220430-

Caribbean Waters of Puerto Rico from 10 NM to 17N-

1212 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TODAY...Northeast winds 15 to 20 knots. Seas 2 to 4 feet

with occasional seas up to 5 feet. Dominant period 8 seconds.

Scattered showers through the day. Isolated thunderstorms in the

afternoon.

.TONIGHT... Tropical storm conditions expected. Northeast winds 15

to 20 knots rising to 35 to 40 knots with gusts to around 50 knots

after midnight. Seas 3 to 5 feet with occasional seas up to 6

feet. Dominant period 8 seconds. Numerous showers and isolated

thunderstorms.

.SATURDAY... Tropical storm conditions possible. Southeast winds

20 to 25 knots. Seas 5 to 7 feet with occasional seas up to 9

feet. Dominant period 10 seconds. Showers and scattered

thunderstorms.

.SATURDAY NIGHT... Tropical storm conditions possible. Southeast

winds 20 to 25 knots with gusts to around 35 knots. Seas 5 to 7

feet with occasional seas up to 9 feet. Dominant period 10

seconds. Numerous showers and scattered 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

showers in the morning, then isolated thunderstorms in the

afternoon.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 7 seconds. Isolated

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.

.MONDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 seconds. Scattered

showers and isolated thunderstorms.

.TUESDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Isolated

thunderstorms in the morning. Scattered showers through the day.



$$



AMZ735-220430-

Coastal Waters of Southern Puerto Rico out 10 NM-

1212 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TODAY...East winds 10 to 15 knots. Gusts up to 25 knots

in the afternoon. Seas 1 to 3 feet. Dominant period 7 seconds.

Scattered showers through the day. Isolated thunderstorms in the

afternoon.

.TONIGHT...Northeast winds 10 to 15 knots. Seas 1 to 3 feet.

Dominant period 7 seconds. Scattered showers and isolated

thunderstorms.

.SATURDAY... Tropical storm conditions expected. East winds 35 to

40 knots with gusts to around 55 knots becoming southeast 10 to 15

knots in the afternoon. Seas 1 to 3 feet. Dominant period 8

seconds. Showers and scattered thunderstorms.

.SATURDAY NIGHT... Tropical storm conditions possible. Southeast

winds 20 to 25 knots with gusts to around 35 knots. Seas 3 to 5

feet with occasional seas up to 6 feet. Dominant period 10

seconds. Showers and scattered thunderstorms.

.SUNDAY...East winds 15 to 20 knots with gusts to around 30 knots.

Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant

period 7 seconds. Scattered showers through the day. Isolated

thunderstorms in the afternoon.

.SUNDAY NIGHT...East winds 10 to 15 knots. Gusts up to 25 knots

after midnight. Seas 3 to 5 feet with occasional seas up to 6

feet. Dominant period 7 seconds. Isolated showers through the

night.

.MONDAY...East winds 10 to 15 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.

.MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 4 feet

with occasional seas up to 5 feet. Dominant period 7 seconds.

Scattered showers and isolated thunderstorms.

.TUESDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Scattered

showers and isolated thunderstorms.



$$



AMZ741-220430-

Mona Passage Southward to 17N-

1212 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TODAY...Northeast winds 15 to 20 knots. Seas 2 to 4 feet

with occasional seas up to 5 feet. Dominant period 8 seconds.

Isolated showers late in the morning, then isolated thunderstorms

in the afternoon.

.TONIGHT...Northeast winds 15 to 20 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 8 seconds. Scattered

showers and isolated thunderstorms.

.SATURDAY...Northeast winds 15 to 20 knots veering southeast in

the afternoon. Gusts up to 25 knots increasing to 30 knots in the

afternoon. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 8 seconds. Numerous showers and scattered

thunderstorms.

.SATURDAY NIGHT... Tropical storm conditions possible. Southeast

winds around 30 knots with gusts to around 40 knots. Seas 4 to 6

feet with occasional seas up to 8 feet. Dominant period 8 seconds.

Showers and scattered thunderstorms.

.SUNDAY...Southeast winds 20 to 25 knots. Gusts up to 35 knots.

Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant

period 10 seconds. Scattered showers and isolated thunderstorms.

.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 10 seconds. Isolated

showers through the night.

.MONDAY...East winds 10 to 15 knots. Gusts up to 25 knots in the

morning. Seas 4 to 6 feet with occasional seas up to 8 feet.

Dominant period 7 seconds. Isolated showers.

.MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to 5 feet

with occasional seas up to 6 feet. Dominant period 7 seconds.

Scattered showers.

.TUESDAY...Southeast winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Isolated

showers.



$$



AMZ742-220430-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

1212 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TODAY...Northeast winds 10 to 15 knots. Gusts up to 25

knots in the afternoon. Seas 1 to 3 feet. Dominant period 8

seconds. Numerous showers through the day. Isolated thunderstorms

in the afternoon.

.TONIGHT...Northeast winds 15 to 20 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 8 seconds. Scattered

showers and isolated thunderstorms.

.SATURDAY... Tropical storm conditions expected. Northeast winds

40 to 45 knots veering south in the afternoon. Gusts up to 60

knots. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 8 seconds. Numerous showers and scattered

thunderstorms.

.SATURDAY NIGHT... Tropical storm conditions possible. Southeast

winds 20 to 25 knots with gusts to around 40 knots. Seas 2 to 4

feet with occasional seas up to 5 feet. Dominant period 7 seconds.

Numerous showers and scattered thunderstorms.

.SUNDAY...East winds 15 to 20 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 10 seconds. Numerous

showers through the day. Isolated thunderstorms in the afternoon.

.SUNDAY NIGHT...East winds 10 to 15 knots with gusts to around 25

knots. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 10 seconds.

.MONDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Isolated

showers.

.MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 4 feet

with occasional seas up to 5 feet. Dominant period 7 seconds.

Isolated showers.

.TUESDAY...Southeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 7 seconds. Scattered showers through the day.

Isolated thunderstorms in the afternoon.



$$



AMZ745-220430-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

1212 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TODAY...East winds 5 to 10 knots. Seas 2 feet or less.

Dominant period 8 seconds. Numerous showers through the day.

Isolated thunderstorms in the afternoon.

.TONIGHT...Northeast winds 10 to 15 knots. Gusts up to 25 knots in

the evening. Seas 2 feet or less. Dominant period 8 seconds.

Isolated showers in the evening, then isolated thunderstorms after

midnight.

.SATURDAY... Tropical storm conditions expected. East winds 10 to

15 knots becoming southeast 40 to 45 knots with gusts to around 60

knots in the afternoon. Seas 2 feet or less. Dominant period 7

seconds. Numerous showers and scattered thunderstorms.

.SATURDAY NIGHT... Tropical storm conditions possible. Southeast

winds around 30 knots with gusts to around 40 knots. Seas 1 to 3

feet. Dominant period 7 seconds. Showers and scattered

thunderstorms.

.SUNDAY...Southeast winds 15 to 20 knots with gusts to around 30

knots. Seas 1 to 3 feet. Dominant period 7 seconds. Scattered

showers through the day. Isolated thunderstorms in the afternoon.

.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 3 feet.

Dominant period 7 seconds.

.MONDAY...Southeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 7 seconds. Scattered showers through the day.

Isolated thunderstorms in the afternoon.

.MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 to 3 feet.

Dominant period 7 seconds. Isolated showers.

.TUESDAY...Southeast winds 10 to 15 knots. Seas 1 to 3 feet.

Dominant period 7 seconds. Scattered showers through the day.

Isolated thunderstorms in the afternoon.



$$

