

772 

FZCA52 TJSJ 230407

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

1207 AM AST Sun Aug 23 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.



AMZ700-231630-

1207 AM AST Sun Aug 23 2020



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

Even though the low pressure center of Tropical Storm Laura is now 

moving into the Dominican Republic, tropical storm conditions are 

expected to continue as rain bands stream toward the storm center. 

Hazardous seas and life-threatening conditions are expected tonight 

but will subside rapidly later tonight and on Sunday. The improving 

marine conditions are expected to continue into the workweek, though 

winds will remain moderate to fresh, and as such, seas will be 

choppy.



$$



AMZ710-231630-

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

1207 AM AST Sun Aug 23 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TONIGHT... Tropical storm conditions expected. Southeast

winds around 30 knots with gusts to around 45 knots. Seas 10 to 12

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

seconds. Northeast swell 4 to 6 feet. Numerous showers and

isolated thunderstorms.

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

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

period 10 seconds. East swell 4 to 5 feet. Isolated showers.

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

occasional seas up to 9 feet. Dominant period 7 seconds. East

swell around 4 feet in the evening. Scattered showers.

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

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

Dominant period 7 seconds. Scattered showers.

.TUESDAY NIGHT...Southeast 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. Isolated showers.

.WEDNESDAY 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 13 seconds. Northeast swell around 4 feet.

Isolated showers.

.THURSDAY...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 12 seconds. Northeast swell around 4 feet.

Isolated showers.



$$



AMZ712-231630-

Coastal Waters of Northern Puerto Rico out 10 NM-

1207 AM AST Sun Aug 23 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TONIGHT... Tropical storm conditions possible. Southeast

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 10

seconds. East swell 4 to 5 feet. Numerous showers and isolated

thunderstorms.

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

Seas 8 to 10 feet with occasional seas up to 11 feet. Dominant

period 10 seconds. Northeast swell around 4 feet. Isolated

showers.

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

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

Dominant period 7 seconds. Northeast swell around 4 feet in the

evening becoming light. 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...East 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 7 seconds. Isolated showers.

.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. Gusts up to 25 knots in

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

Dominant period 12 seconds. Northeast swell around 4 feet in the

afternoon. Isolated showers.

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

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

feet. Dominant period 13 seconds. Northeast swell around 4 feet.

Scattered showers.

.THURSDAY...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 12 seconds. Northeast swell around 4 feet in the

afternoon. Isolated thunderstorms through the day. Scattered

showers in the afternoon.



$$



AMZ715-231630-

Coastal Waters of Northern USVI and Culebra out 10 NM-

1207 AM AST Sun Aug 23 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TONIGHT...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 8 seconds. Northeast swell around 4 feet.

Scattered showers and isolated thunderstorms.

.SUNDAY...East 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 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 10 to 15 knots with gusts to around 25 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. Gusts up to 25 knots

after midnight. 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. 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.

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

with occasional seas up to 5 feet. Dominant period 12 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. Isolated

showers.

.WEDNESDAY 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 13 seconds. Scattered showers.

.THURSDAY...East 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 11 seconds. Isolated thunderstorms in the morning.

Scattered showers through the day.



$$



AMZ722-231630-

Anegada Passage Southward to 17N-

1207 AM AST Sun Aug 23 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TONIGHT...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 8 seconds. Scattered showers.

.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. Isolated showers.

.SUNDAY NIGHT...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.

.MONDAY...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.

.MONDAY 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. Scattered showers.

.TUESDAY...Southeast 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.

.TUESDAY 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 12 seconds. Isolated showers.

.WEDNESDAY...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 12 seconds. Isolated showers.

.WEDNESDAY 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 11 seconds. Scattered showers.

.THURSDAY...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 12 seconds. Northeast swell around 4 feet in the

afternoon. Scattered showers.



$$



AMZ725-231630-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

1207 AM AST Sun Aug 23 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TONIGHT...Southeast 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. East swell around 4 feet. Showers

and isolated thunderstorms.

.SUNDAY...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.

.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 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.

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

after midnight. 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. 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.

.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. Isolated

showers.

.WEDNESDAY NIGHT...East winds 10 to 15 knots with gusts to around

25 knots. Seas 1 to 3 feet. Dominant period 12 seconds. Scattered

showers.

.THURSDAY...East 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 11 seconds. Isolated thunderstorms in the morning.

Scattered showers through the day.



$$



AMZ732-231630-

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

1207 AM AST Sun Aug 23 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TONIGHT... Tropical storm conditions expected. East 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...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 7 seconds. East swell up to 4 feet. Isolated showers.

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

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

showers.

.MONDAY 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 7 seconds. Scattered showers and isolated

thunderstorms.

.TUESDAY...Southeast 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.

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

after midnight. Seas 2 to 4 feet with occasional seas up to 5

feet. Dominant period 10 seconds. Isolated showers.

.WEDNESDAY...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 12 seconds. Isolated showers.

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

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

Scattered showers.

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

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

thunderstorms in the morning. Scattered showers through the day.



$$



AMZ735-231630-

Coastal Waters of Southern Puerto Rico out 10 NM-

1207 AM AST Sun Aug 23 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TONIGHT... Tropical storm conditions expected. Southeast

winds around 30 knots with gusts to around 45 knots. Seas 6 to 8

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

seconds. North swell around 4 feet. Showers and isolated

thunderstorms.

.SUNDAY...East 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. Scattered showers.

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

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

Dominant period 7 seconds. Isolated showers through the night.

.MONDAY...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 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. Gusts up to 25 knots in the

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

Dominant period 7 seconds. Scattered showers.

.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. Gusts up to 25 knots in

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

Dominant period 7 seconds. Isolated showers.

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

after midnight. Seas 2 to 4 feet with occasional seas up to 5

feet. Dominant period 7 seconds. Isolated showers.

.THURSDAY...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, then isolated showers in the

afternoon.



$$



AMZ741-231630-

Mona Passage Southward to 17N-

1207 AM AST Sun Aug 23 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TONIGHT... Tropical storm conditions expected. Southeast

winds around 30 knots with gusts to around 45 knots. Seas 6 to 8

feet with occasional seas up to 10 feet. Dominant period 7

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

thunderstorms.

.SUNDAY...Southeast 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 10 seconds. Northeast swell up to 4 feet. Isolated

thunderstorms in the morning. Scattered showers through the day.

.SUNDAY NIGHT...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 7 seconds. South swell up to 4 feet. 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. Gusts up to 25 knots in

the evening. 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 with gusts to around 25

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

Dominant period 7 seconds. Isolated showers.

.TUESDAY 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 7 seconds. Isolated showers.

.WEDNESDAY...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 12 seconds. Isolated showers.

.WEDNESDAY NIGHT...East 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 12 seconds. Isolated showers.

.THURSDAY...East 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 11 seconds. Isolated showers.



$$



AMZ742-231630-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

1207 AM AST Sun Aug 23 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TONIGHT... Tropical storm conditions expected. Southeast

winds around 30 knots with gusts to around 45 knots. Seas 5 to 7

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

Northeast swell around 4 feet. Showers and isolated thunderstorms.

.SUNDAY...Southeast winds 10 to 15 knots. Gusts up to 25 knots in

the morning. 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 10 to 15 knots with gusts to around 25

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

Dominant period 7 seconds. Isolated showers through the night.

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

the evening. 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...Northeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 12 seconds. Scattered showers through the day.

Isolated thunderstorms in the afternoon.

.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet with

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

showers.

.THURSDAY...East winds 10 to 15 knots backing northeast in the

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

showers through the day. Isolated thunderstorms in the afternoon.



$$



AMZ745-231630-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

1207 AM AST Sun Aug 23 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TONIGHT... Tropical storm conditions expected. Southeast

winds around 30 knots with gusts to around 45 knots. Seas 4 to 6

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

Showers and isolated thunderstorms.

.SUNDAY...Southeast winds 15 to 20 knots with gusts to around 35

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

Dominant period 7 seconds. Isolated showers.

.SUNDAY 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.

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

Dominant period 7 seconds. Isolated showers.

.TUESDAY...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.

.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.

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

Dominant period 10 seconds. Isolated showers.

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

afternoon. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated

showers.



$$

