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092 

FZCA52 TJSJ 212010

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

410 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.



AMZ700-220845-

410 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.



$$



AMZ710-220845-

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

410 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.TONIGHT...East winds 20 to 25 knots. Gusts up to 55 knots after

midnight. Seas 12 to 14 feet with occasional seas up to 17 feet.

Dominant period 10 seconds. North swell 4 to 7 feet. Showers and

isolated thunderstorms.

.SATURDAY...Southeast winds 30 to 40 knots with gusts to around 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...Southeast winds 20 to 25 knots with gusts to

around 40 knots. Seas 12 to 14 feet with occasional seas up to 18

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

and isolated thunderstorms.

.SUNDAY...East winds 15 to 20 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 in the morning, then isolated

thunderstorms in the afternoon.

.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.

.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. 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. 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.



$$



AMZ712-220845-

Coastal Waters of Northern Puerto Rico out 10 NM-

410 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.TONIGHT...Northeast winds 20 to 25 knots. Gusts up to 40 knots

after midnight. Seas 6 to 8 feet with occasional seas up to 10

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

after midnight. Showers and isolated thunderstorms.

.SATURDAY...East winds 30 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...Southeast winds 15 to 20 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 6 to 8 feet with

occasional seas up to 10 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. 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, then 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. Scattered showers.



$$



AMZ715-220845-

Coastal Waters of Northern USVI and Culebra out 10 NM-

410 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.TONIGHT...Northeast winds 15 to 25 knots rising to 35 to 45 knots

with gusts to around 60 knots after midnight. Seas 10 to 12 feet

with occasional seas up to 14 feet. Dominant period 8 seconds.

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

.SATURDAY...Southeast winds 30 to 40 knots with gusts to around 60

knots easing to 20 to 25 knots in the afternoon. 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...Southeast winds 20 to 25 knots backing east

after midnight. Seas 8 to 10 feet with occasional seas up to 11

feet. Dominant period 8 seconds. Northeast swell 4 to 5 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 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 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. Isolated thunderstorms.

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

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

thunderstorms. Scattered showers.

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

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

swell around 4 feet. Scattered showers.



$$



AMZ722-220845-

Anegada Passage Southward to 17N-

410 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.TONIGHT...Northeast winds 30 to 40 knots veering southeast after

midnight. Gusts up to 60 knots. Seas 12 to 14 feet with occasional

seas up to 17 feet. Dominant period 10 seconds. Northeast swell 4

to 7 feet. Showers and isolated thunderstorms.

.SATURDAY...Southeast winds 20 to 25 knots with gusts to around 40

knots. Seas 12 to 14 feet with occasional seas up to 17 feet.

Dominant period 10 seconds. Northeast swell 4 to 7 feet. Showers

and isolated thunderstorms.

.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 8 to 10 feet

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

Southeast 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 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. Scattered

showers.

.TUESDAY...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 thunderstorms, then

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. Scattered showers.



$$



AMZ725-220845-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

410 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.TONIGHT...Northeast winds 15 to 25 knots rising to 30 to 40 knots

with gusts to around 60 knots after midnight. Seas 8 to 10 feet

with occasional seas up to 11 feet building to 12 to 14 feet with

occasional seas up to 18 feet after midnight. Dominant period 8

seconds. East swell 4 to 7 feet. Showers and isolated

thunderstorms.

.SATURDAY...Southeast winds 30 to 40 knots with gusts to around 60

knots easing to 15 to 25 knots in the afternoon. 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...Southeast winds 20 to 25 knots backing east

after midnight. Seas 8 to 10 feet with occasional seas up to 13

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 4 to 6 feet with

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

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. 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. Isolated

thunderstorms. Scattered 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.



$$



AMZ732-220845-

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

410 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.TONIGHT...Northeast winds 10 to 20 knots with gusts to around 35

knots rising to 25 to 35 knots with gusts to around 55 knots after

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

Dominant period 7 seconds. East swell 4 to 5 feet after midnight.

Showers and isolated thunderstorms.

.SATURDAY...Southeast winds 20 to 25 knots. Gusts up to 55 knots

in the morning. Seas 10 to 12 feet with occasional seas up to 14

feet. Dominant period 8 seconds. East swell 4 to 5 feet. Showers

and isolated thunderstorms.

.SATURDAY NIGHT...Southeast winds 20 to 25 knots. Seas 8 to 10

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

seconds. Northeast 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 7 seconds. Northeast

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 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. 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. Scattered showers.

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

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

Southeast swell around 4 feet. Scattered showers.



$$



AMZ735-220845-

Coastal Waters of Southern Puerto Rico out 10 NM-

410 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



.TONIGHT...Northeast winds 10 to 15 knots. Gusts up to 35 knots

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

feet. Dominant period 7 seconds. Showers and isolated

thunderstorms.

.SATURDAY...East winds 30 to 40 knots with gusts to around 60

knots becoming southeast 15 to 25 knots in the afternoon. Seas 5

to 7 feet with occasional seas up to 9 feet. Dominant period 7

seconds. Showers and isolated thunderstorms.

.SATURDAY NIGHT...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 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 4 to 6 feet with

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

showers through the night.

.MONDAY...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 1 to 3 feet. Dominant

period 7 seconds. Isolated thunderstorms. Scattered showers.

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

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

showers.



$$



AMZ741-220845-

Mona Passage Southward to 17N-

410 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...Northeast winds 20 to 25 knots with gusts to around 35

knots becoming southeast with gusts to around 60 knots in the

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

Dominant period 7 seconds. Showers and isolated thunderstorms.

.SATURDAY NIGHT...Southeast winds around 30 knots. Seas 8 to 10

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

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

thunderstorms.

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

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

Northeast swell around 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...Northeast winds 10 to 15 knots. Seas 4 to 6 feet with

occasional seas up to 8 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.

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

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

Southeast swell around 4 feet. Isolated showers.



$$



AMZ742-220845-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

410 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...Northeast winds 35 to 45 knots veering south in the

afternoon. Gusts up to 60 knots. Seas 4 to 6 feet with occasional

seas up to 8 feet. Dominant period 7 seconds. Showers and isolated

thunderstorms.

.SATURDAY NIGHT...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 10 to 15 knots. Seas 5 to 7 feet with

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

swell around 4 Feet. Numerous 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 8 seconds.

.MONDAY...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. Isolated thunderstorms. Scattered

showers.

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

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

swell around 4 feet. Isolated thunderstorms. Scattered showers.



$$



AMZ745-220845-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

410 PM AST Fri Aug 21 2020



...TROPICAL STORM WARNING IN EFFECT...



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

Dominant period 7 seconds. Scattered showers and isolated

thunderstorms.

.SATURDAY...East winds 15 to 25 knots becoming southeast 35 to 45

knots with gusts to around 60 knots in the afternoon. Seas 1 to 3

feet. Dominant period 7 seconds. Showers and isolated

thunderstorms.

.SATURDAY NIGHT...Southeast winds around 30 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. 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 2 to 4 feet with

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

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

Dominant period 7 seconds. Isolated thunderstorms. Scattered

showers.

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

period 7 seconds. Isolated thunderstorms, then isolated showers.

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

period 10 seconds. Scattered showers.



$$

