

784 

FZCA52 TJSJ 212013

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

413 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.



AMZ700-220915-

413 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.



$$



AMZ710-220915-

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

413 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



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

around 30 knots. Gusts up to 35 knots increasing to 45 knots after

midnight. Seas 10 to 12 feet with occasional seas up to 15 feet.

Dominant period 10 seconds. North swell 4 to 6 feet. Showers and

isolated thunderstorms.

.SATURDAY... Tropical storm conditions expected. East winds around

30 knots with gusts to around 55 knots. Seas 12 to 14 feet with

occasional seas up to 18 feet. Dominant period 10 seconds.

Northeast swell 4 to 7 feet. Showers and isolated thunderstorms.

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

winds around 30 knots. Seas 12 to 14 feet with occasional seas up

to 17 feet. Dominant period 10 seconds. East swell 4 to 7 feet.

Showers and isolated thunderstorms.

.SUNDAY...East winds 20 to 25 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 10 seconds. East

swell 4 to 5 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 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. 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.

.TUESDAY 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. Isolated showers.

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

occasional seas up to 6 feet. Dominant period 12 seconds.

Northeast swell around 4 feet in the afternoon. Isolated showers.



$$



AMZ712-220915-

Coastal Waters of Northern Puerto Rico out 10 NM-

413 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



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

to 20 knots. Gusts up to 35 knots. Seas 5 to 7 feet with occasional 

seas up to 9 feet. Dominant period 7 seconds. Showers and isolated 

thunderstorms.

.SATURDAY... Tropical storm conditions expected. East winds 20 to

25 knots with gusts to around 60 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 8 seconds.

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

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

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

13 feet. Dominant period 10 seconds. East swell 4 to 5 feet.

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 10 seconds.

Northeast swell around 4 Feet. 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 8 seconds. Isolated

showers.

.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.

.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.

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

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

Isolated showers.

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

occasional seas up to 5 feet. Dominant period 12 seconds.

Scattered showers.



$$



AMZ715-220915-

Coastal Waters of Northern USVI and Culebra out 10 NM-

413 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.TONIGHT... Tropical storm conditions expected. East winds 20 to

25 knots. Gusts up to 60 knots after midnight. Seas 8 to 10 feet

with occasional seas up to 13 feet. Dominant period 8 seconds.

North swell 4 to 5 feet after midnight. Showers and isolated

thunderstorms.

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

around 30 knots. Gusts up to 55 knots in the morning. Seas 10 to

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

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

thunderstorms.

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

winds around 30 knots. Seas 8 to 10 feet with occasional seas up

to 11 feet. Dominant period 8 seconds. Northeast swell around 4

Feet. Showers and isolated 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...East winds 15 to 20 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...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.

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

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

showers.

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

occasional seas up to 5 feet. Dominant period 12 seconds.

Scattered showers.



$$



AMZ722-220915-

Anegada Passage Southward to 17N-

413 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.TONIGHT... Tropical storm conditions expected. East winds 20 to

25 knots with gusts to around 55 knots. Seas 10 to 12 feet with

occasional seas up to 15 feet. Dominant period 10 seconds.

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

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

around 30 knots with gusts to around 40 knots. Seas 10 to 12 feet

with occasional seas up to 15 feet. Dominant period 10 seconds.

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

.SATURDAY NIGHT...East winds 15 to 20 knots with gusts to around

30 knots. Seas 8 to 10 feet with occasional seas up to 11 feet.

Dominant period 8 seconds. East swell 4 to 5 feet in the evening.

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. 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...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. 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 7 seconds. Isolated

thunderstorms in the morning. Scattered showers through the day.

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

occasional seas up to 6 feet. Dominant period 12 seconds.

Northeast swell around 4 feet after midnight. Isolated showers.

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

occasional seas up to 5 feet. Dominant period 12 seconds.

Northeast swell around 4 feet. Scattered showers.



$$



AMZ725-220915-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

413 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



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

to 25 knots. Gusts up to 35 knots increasing to 55 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 8 seconds. East swell 4 to 6 feet after

midnight. Showers and isolated thunderstorms.

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

around 30 knots. Gusts up to 60 knots in the morning. Seas 12 to

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

seconds. Northeast swell 4 to 6 feet. Showers and isolated

thunderstorms.

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

winds 20 to 25 knots. Gusts up to 35 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 8 seconds. East

swell 4 to 5 feet. 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. 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...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. 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.

.TUESDAY 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.

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

occasional seas up to 5 feet. Dominant period 11 seconds.

Scattered showers.



$$



AMZ732-220915-

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

413 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



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

to 20 knots. Gusts up to 35 knots increasing to 50 knots after

midnight. Seas 5 to 7 feet with occasional seas up to 9 feet.

Dominant period 7 seconds. East swell up to 4 feet after midnight.

Showers and isolated thunderstorms.

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

20 to 25 knots with gusts to around 35 knots. Seas 8 to 10 feet

with occasional seas up to 11 feet. Dominant period 8 seconds.

East swell up to 4 feet. Showers and isolated thunderstorms.

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

20 to 25 knots with gusts to around 35 knots. Seas 6 to 8 feet

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

Northeast swell up to 4 feet. Showers and isolated thunderstorms.

.SUNDAY...East winds 20 to 25 knots. Seas 5 to 7 feet with

occasional seas up to 9 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 3 to 5 feet with

occasional seas up to 6 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...Southeast 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.

.TUESDAY 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.

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

occasional seas up to 5 feet. Dominant period 12 seconds.

Scattered showers.



$$



AMZ735-220915-

Coastal Waters of Southern Puerto Rico out 10 NM-

413 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



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

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

and isolated thunderstorms.

.SATURDAY... Tropical storm conditions possible. Northwest winds

15 to 20 knots with gusts to around 55 knots veering southeast

with gusts to around 35 knots in the afternoon. Seas 3 to 5 feet

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

Showers and isolated thunderstorms.

.SATURDAY NIGHT... Tropical storm conditions possible. East 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 7 seconds.

Northeast swell around 4 feet. Showers and isolated 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...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 1 to 3 feet. Dominant

period 7 seconds. Scattered showers and isolated thunderstorms.

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

Dominant period 7 seconds. Isolated showers.

.WEDNESDAY...East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant

period 7 seconds. Isolated showers.



$$



AMZ741-220915-

Mona Passage Southward to 17N-

413 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



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

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

showers and isolated thunderstorms.

.SATURDAY... Tropical storm conditions possible. Northeast winds

15 to 20 knots. Gusts up to 25 knots increasing to 35 knots in the

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

Dominant period 7 seconds. Showers and isolated thunderstorms.

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

winds 20 to 25 knots with gusts to around 40 knots. Seas 6 to 8

feet with occasional seas up to 10 feet. Dominant period 8

seconds. Northeast swell up to 4 feet. Showers and isolated

thunderstorms.

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

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

period 10 seconds. Northeast swell up to 4 feet. Scattered showers

and isolated thunderstorms.

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

occasional seas up to 9 feet. Dominant period 8 seconds. Isolated

showers through the night.

.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.

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

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

showers.

.TUESDAY 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.

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

occasional seas up to 5 feet. Dominant period 11 seconds. Isolated

showers.



$$



AMZ742-220915-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

413 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.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 isolated thunderstorms.

.SATURDAY... Tropical storm conditions possible. East winds 20 to

25 knots with gusts to around 60 knots. Seas 4 to 6 feet with

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

and isolated thunderstorms.

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

winds 20 to 25 knots with gusts to around 40 knots. Seas 6 to 8

feet with occasional seas up to 10 feet. Dominant period 8

seconds. Northeast swell around 4 feet. 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 10 seconds. Numerous

showers through the day. Isolated thunderstorms in the afternoon.

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

occasional seas up to 5 feet. Dominant period 8 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...East winds 10 to 15 knots. Seas 2 to 4 feet with

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

showers.

.TUESDAY...East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant

period 7 seconds. Scattered showers through the day. Isolated

thunderstorms in the afternoon.

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

Dominant period 7 seconds. Isolated showers.

.WEDNESDAY...East winds 5 to 10 knots backing north in the

afternoon. Seas 1 to 3 feet. Dominant period 12 seconds. Scattered

showers through the day. Isolated thunderstorms in the afternoon.



$$



AMZ745-220915-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

413 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



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

the evening. Seas 1 to 3 feet. Dominant period 7 seconds.

Scattered showers and isolated thunderstorms.

.SATURDAY... Tropical storm conditions possible. Northeast winds

15 to 20 knots. Gusts up to 35 knots increasing to 60 knots in the

afternoon. Seas 1 to 3 feet. Dominant period 7 seconds. Showers

and isolated thunderstorms.

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

winds 20 to 25 knots with gusts to around 40 knots. Seas 3 to 5

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

Showers and isolated thunderstorms.

.SUNDAY...Southeast 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. Scattered showers through the day.

Isolated thunderstorms in the afternoon.

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

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

.MONDAY...Northeast winds 5 to 10 knots veering south in the

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

showers through the day. Isolated thunderstorms in the afternoon.

.MONDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 7 seconds. Isolated showers.

.TUESDAY...Southeast winds 10 to 15 knots. Seas 2 feet or less.

Dominant period 7 seconds. Scattered showers through the day.

Isolated thunderstorms in the afternoon.

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

Dominant period 7 seconds. Isolated showers.

.WEDNESDAY...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.



$$

