

065 

FZCA52 TJSJ 220050

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

850 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.



AMZ700-221345-

850 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 

local waters. Hazardous seas and life-threatening conditions are 

expected during the weekend. Marine conditions are expected to 

improve Sunday night into early the next work week.



$$



AMZ710-221345-

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

850 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



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

winds 20 to 25 knots rising to 30 to 35 knots with gusts to around

50 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 30 to

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

up to 60 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 with gusts to around 45 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. Gusts up to 35 knots in the

morning. 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. 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. 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 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. 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.



$$



AMZ712-221345-

Coastal Waters of Northern Puerto Rico out 10 NM-

850 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TONIGHT...Northeast winds 15 to 20 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. Northeast winds

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



$$



AMZ715-221345-

Coastal Waters of Northern USVI and Culebra out 10 NM-

850 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



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

winds 20 to 25 knots rising to 35 to 40 knots with gusts to around

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

35 to 40 knots with gusts to around 60 knots easing to 25 to 30

knots with gusts to around 45 knots in the afternoon. 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 with gusts to around 40 knots. Seas 8 to 10

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

seconds. Northeast swell around 4 feet in the evening. 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.



$$



AMZ722-221345-

Anegada Passage Southward to 17N-

850 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



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

winds 20 to 25 knots becoming east 35 to 40 knots with gusts to

around 55 knots after midnight. 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... Tropical storm conditions possible. East winds

20 to 25 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 becoming light. 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. 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.



$$



AMZ725-221345-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

850 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



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

winds 15 to 20 knots rising to 35 to 40 knots with gusts to around

60 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

35 to 40 knots with gusts to around 60 knots easing to 25 to 30

knots with gusts to around 40 knots in the afternoon. 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 40 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.



$$



AMZ732-221345-

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

850 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



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

winds 15 to 20 knots becoming north 35 to 40 knots with gusts to

around 55 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 expected. Southwest winds

30 to 35 knots with gusts to around 50 knots becoming south 20 to

25 knots with gusts to around 40 knots in the afternoon. 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. 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 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.



$$



AMZ735-221345-

Coastal Waters of Southern Puerto Rico out 10 NM-

850 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF TONIGHT...North 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 expected. West winds 35 to

40 knots with gusts to around 60 knots becoming south 20 to 25

knots 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. Southeast

winds 20 to 25 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. 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. 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.



$$



AMZ741-221345-

Mona Passage Southward to 17N-

850 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF 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 expected. North winds 15 to

20 knots becoming west around 30 knots with gusts to around 45

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. Gusts up to 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. Gusts up to 35 knots in the

morning. 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.



$$



AMZ742-221345-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

850 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF 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 expected. Northeast winds

15 to 20 knots becoming south 40 to 45 knots with gusts to around

60 knots in the afternoon. 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. 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.



$$



AMZ745-221345-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

850 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.REST OF 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. North winds 10 to

15 knots becoming northeast 40 to 45 knots with gusts to around 65

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. 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. 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.



$$

