

215 

FZCA52 TJSJ 171406 CCA

CWFSJU



Coastal Waters Forecast...CORRECTED

National Weather Service San Juan PR

1006 AM AST Mon Aug 17 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.



AMZ700-180230-

1006 AM AST Mon Aug 17 2020



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

Moderate to fresh trade winds will gradually increase today through 

Wednesday to generate choppy--locally hazardous marine conditions as 

a tropical wave passes south of the area Tuesday afternoon and 

evening. A surface trough will cross the regional waters Thursday 

into Friday followed by a vigorous tropical wave forecast for the 

upcoming weekend. This will lead to hazardous and deteriorating 

marine conditions along with increased potential for thunderstorm 

activity across the regional waters.



$$



AMZ710-180230-

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

1006 AM AST Mon Aug 17 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH

WEDNESDAY MORNING...



.REST OF TODAY...East winds 10 to 15 knots. Seas 4 to 6 feet with

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

showers through the day.

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

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

showers.

.TUESDAY...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 day.

.TUESDAY 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.

.WEDNESDAY...East winds 15 to 20 knots. Seas 4 to 7 feet with 

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

showers.

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

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

showers. Isolated thunderstorms.

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

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

swell around 4 feet. Numerous showers and isolated thunderstorms.



$$



AMZ712-180230-

Coastal Waters of Northern Puerto Rico out 10 NM-

1006 AM AST Mon Aug 17 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TODAY...East winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 10 seconds. Isolated

showers through the day.

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

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

showers through the night.

.TUESDAY...East winds 15 to 20 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 3 to 5 feet with

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

showers through the night.

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

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

showers.

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

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

showers.

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

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

showers and isolated thunderstorms.



$$



AMZ715-180230-

Coastal Waters of Northern USVI and Culebra out 10 NM-

1006 AM AST Mon Aug 17 2020



.REST OF TODAY...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 day.

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

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

showers.

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

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

showers.

.TUESDAY 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.

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

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

showers.

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

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

showers. Isolated thunderstorms.

.FRIDAY...East winds 20 to 25 knots. Seas 4 to 6 feet with

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

showers and isolated thunderstorms.



$$



AMZ722-180230-

Anegada Passage Southward to 17N-

1006 AM AST Mon Aug 17 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY EVENING THROUGH

WEDNESDAY MORNING...



.REST OF TODAY...East winds 15 to 20 knots. Seas 4 to 6 feet with

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

showers through the day.

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

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

showers.

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

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

showers.

.TUESDAY NIGHT...East winds 15 to 20 knots with gusts to around 35

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

Dominant period 8 seconds. North swell around 4 feet. Scattered

showers.

.WEDNESDAY...East winds 15 to 20 knots. Seas 4 to 7 feet with

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

showers.

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

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

showers. Isolated thunderstorms.

.FRIDAY...East winds 20 to 25 knots with gusts to around 40 knots.

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

period 7 seconds. North swell around 4 feet. Numerous showers.

Isolated thunderstorms.



$$



AMZ725-180230-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

1006 AM AST Mon Aug 17 2020



.REST OF TODAY...East winds 10 to 15 knots. Seas 3 to 5 feet with

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

showers through the day.

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

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

showers.

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

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

showers.

.TUESDAY 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.

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

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

showers.

.THURSDAY...East winds 10 to 15 knots. Seas 4 to 6 feet with

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

showers. Isolated thunderstorms.

.FRIDAY...East winds 20 to 25 knots with gusts to around 40 knots.

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

period 7 seconds. Numerous showers and isolated thunderstorms.



$$



AMZ732-180230-

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

1006 AM AST Mon Aug 17 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TODAY...East winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 10 seconds. Isolated

showers through the day.

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

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

showers.

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

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

showers through the day.

.TUESDAY NIGHT...East winds 20 to 25 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 7 seconds. North

swell around 4 feet after midnight. Scattered showers.

.WEDNESDAY...East winds 15 to 20 knots with gusts to around 35

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

Dominant period 7 seconds. East swell around 4 feet. Scattered

showers and isolated thunderstorms.

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

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

showers. Isolated thunderstorms.

.FRIDAY...East winds 20 to 25 knots with gusts to around 40 knots.

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

period 7 seconds. Numerous showers and isolated thunderstorms.



$$



AMZ735-180230-

Coastal Waters of Southern Puerto Rico out 10 NM-

1006 AM AST Mon Aug 17 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...



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

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

showers through the day.

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

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

showers.

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

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

showers through the day.

.TUESDAY NIGHT...East 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.

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

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

showers.

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

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

showers.

.FRIDAY...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.



$$



AMZ741-180230-

Mona Passage Southward to 17N-

1006 AM AST Mon Aug 17 2020



.REST OF TODAY...East winds 10 to 15 knots. Seas 2 to 4 feet with

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

showers through the day.

.TONIGHT...East winds 10 to 15 knots with gusts to around 30

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

Dominant period 10 seconds. Isolated showers through the night.

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

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

showers through the day.

.TUESDAY NIGHT...East winds 20 to 25 knots. Seas 6 to 8 feet with

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

Northeast swell around 4 feet after midnight. Isolated showers.

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

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

swell around 4 feet. Scattered showers. Isolated thunderstorms.

.THURSDAY...Northeast winds 15 to 20 knots. Seas 5 to 7 feet with

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

showers.

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

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

thunderstorms, then isolated showers.



$$



AMZ742-180230-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

1006 AM AST Mon Aug 17 2020



.REST OF TODAY...East winds 10 to 15 knots. Seas 1 to 3 feet.

Dominant period 8 seconds. Isolated thunderstorms in the

afternoon.

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

period 8 seconds. Scattered showers.

.TUESDAY...East winds 15 to 20 knots. Gusts up to 35 knots in the

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

thunderstorms in the afternoon.

.TUESDAY NIGHT...East winds 15 to 20 knots. Gusts up to 35 knots

in the evening. 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 10 seconds. Isolated

showers.

.THURSDAY...Northeast 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.

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

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

thunderstorms, then scattered showers.



$$



AMZ745-180230-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

1006 AM AST Mon Aug 17 2020



.REST OF TODAY...East winds 10 to 15 knots. Seas 2 feet or less.

Dominant period 10 seconds.

.TONIGHT...East winds 10 to 15 knots. Seas 2 feet or less.

Dominant period 8 seconds. Isolated showers through the night.

.TUESDAY...East winds 15 to 20 knots. Seas 1 to 3 feet. Dominant

period 7 seconds.

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

Dominant period 8 seconds. Isolated showers.

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

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

showers.

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

Dominant period 7 seconds. Isolated showers.

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

period 7 seconds. Isolated showers.



$$

