

320 

FZCA52 TJSJ 190819

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

419 AM AST Mon Oct 19 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.



AMZ700-192100-

419 AM AST Mon Oct 19 2020



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

Light to moderate north to northeast winds are expected for the next

few days due to high pressure in the western Atlantic and a 

developing area of low pressure to our northeast. A northeasterly 

swell generated by the developing low will enter and spread across 

the Atlantic waters from Tuesday onwards. This will result in 

deteriorating and hazardous seas through the rest of the work-week 

and possibly into the upcoming weekend as a secondary northerly swell

is so far forecast to follow.



$$



AMZ710-192100-

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

419 AM AST Mon Oct 19 2020



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

FRIDAY AFTERNOON...



.TODAY...North winds 5 to 10 knots. Seas 3 to 5 feet with

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

showers.

.TONIGHT...North winds 5 to 10 knots. Seas 4 to 6 feet with

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

Scattered showers.

.TUESDAY...Northwest winds 5 to 10 knots. Seas 6 to 8 feet with

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

Northeast swell 4 to 7 feet in the afternoon. Isolated showers.

.TUESDAY NIGHT...Northwest winds 5 to 10 knots backing southwest

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

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

Isolated showers.

.WEDNESDAY...South winds 5 to 10 knots. Seas 6 to 8 feet with

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

Northeast swell 4 to 8 feet. Scattered showers. Isolated

thunderstorms.

.THURSDAY...Southeast winds 5 to 10 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 12 seconds.

Northeast swell 5 to 8 feet. Scattered showers. Isolated

thunderstorms.

.FRIDAY...Southeast winds 10 to 15 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 11 seconds. North

swell 4 to 7 feet. Scattered showers.



$$



AMZ712-192100-

Coastal Waters of Northern Puerto Rico out 10 NM-

419 AM AST Mon Oct 19 2020



.TODAY...North winds 5 to 10 knots. Seas 1 to 3 feet. Dominant

period 10 seconds. Isolated showers through the day.

.TONIGHT...North winds 5 to 10 knots backing west after midnight.

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

period 10 seconds. Isolated showers.

.TUESDAY...Southwest winds 5 to 10 knots veering northwest in the

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

Dominant period 10 seconds. Scattered showers through the day.

Isolated thunderstorms in the afternoon.

.TUESDAY NIGHT...West winds 5 to 10 knots backing south after

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

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

showers.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 6 to 8 feet with

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

Northeast swell 4 to 8 feet. Isolated thunderstorms, then isolated

showers.

.THURSDAY...Southeast winds 5 to 10 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 12 seconds.

Northeast swell 6 to 8 feet. Isolated thunderstorms. Scattered

showers.

.FRIDAY...Southeast winds 5 to 10 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 11 seconds. North

swell 4 to 6 feet. Isolated thunderstorms, then scattered showers.



$$



AMZ715-192100-

Coastal Waters of Northern USVI and Culebra out 10 NM-

419 AM AST Mon Oct 19 2020



.TODAY...North winds 5 to 10 knots. Seas 1 to 3 feet. Dominant

period 10 seconds. Isolated showers.

.TONIGHT...Northwest winds 5 to 10 knots. Seas 2 to 4 feet with

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

showers.

.TUESDAY...West winds 5 to 10 knots. Seas 3 to 5 feet with

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

Scattered showers through the day. Isolated thunderstorms in the

afternoon.

.TUESDAY NIGHT...Southwest winds 5 to 10 knots. Seas 5 to 7 feet

with occasional seas up to 9 feet. Dominant period 11 seconds.

North swell 4 to 7 feet. Scattered showers.

.WEDNESDAY...South winds 5 to 10 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 11 seconds. North

swell 4 to 8 feet. Isolated thunderstorms. Scattered showers.

.THURSDAY...Southeast winds 5 to 10 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 11 seconds. North

swell 4 to 7 feet. Isolated thunderstorms. Scattered showers.

.FRIDAY...Southeast winds 10 to 15 knots. Seas 4 to 6 feet with

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

swell 4 to 6 feet. Scattered showers.



$$



AMZ722-192100-

Anegada Passage Southward to 17N-

419 AM AST Mon Oct 19 2020



.TODAY...Northwest winds 5 to 10 knots. Seas 2 to 4 feet with

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

showers.

.TONIGHT...Northwest winds 5 to 10 knots backing west after

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

Dominant period 9 seconds. Isolated showers.

.TUESDAY...West winds 5 to 10 knots. Seas 4 to 6 feet with

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

showers.

.TUESDAY NIGHT...Southwest winds 5 to 10 knots. Seas 6 to 8 feet

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

North swell 4 to 8 feet. Scattered showers.

.WEDNESDAY...South winds 5 to 10 knots. Seas 6 to 8 feet with

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

Northeast swell 5 to 8 feet. Scattered showers. Isolated

thunderstorms.

.THURSDAY...East winds 10 to 15 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 12 seconds. North

swell 5 to 7 feet. Isolated showers.

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

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

Northeast swell 4 to 5 feet. Scattered showers.



$$



AMZ725-192100-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

419 AM AST Mon Oct 19 2020



.TODAY...North winds 5 to 10 knots. Seas 2 feet or less. Dominant

period 8 seconds. Isolated showers.

.TONIGHT...Northwest winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 10 seconds. Isolated showers.

.TUESDAY...West winds 5 to 10 knots. Seas 2 to 4 feet with

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

Scattered showers through the day. Isolated thunderstorms in the

afternoon.

.TUESDAY NIGHT...Southwest winds 5 to 10 knots. Seas 4 to 6 feet

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

Northeast swell 4 to 5 feet after midnight. Scattered showers.

.WEDNESDAY...South winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 11 seconds.

Northeast swell 4 to 5 feet. Isolated thunderstorms. Scattered

showers.

.THURSDAY...Southeast winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 11 seconds.

Northeast swell 4 to 5 feet. Isolated thunderstorms. Scattered

showers.

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

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

Northeast swell 4 to 5 feet. Scattered showers.



$$



AMZ732-192100-

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

419 AM AST Mon Oct 19 2020



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

period 10 seconds. Isolated showers.

.TONIGHT...Northeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 10 seconds. Isolated showers.

.TUESDAY...North winds 5 to 10 knots backing south in the

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

Dominant period 10 seconds. Isolated showers.

.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 5 to 7 feet

with occasional seas up to 9 feet. Dominant period 11 seconds.

Northeast swell 4 to 6 feet. Scattered showers.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 11 seconds.

Northeast swell 4 to 7 feet. Scattered showers.

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

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

Northeast swell 4 to 6 feet. Isolated showers.

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

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

Northeast swell 4 to 5 feet. Scattered showers.



$$



AMZ735-192100-

Coastal Waters of Southern Puerto Rico out 10 NM-

419 AM AST Mon Oct 19 2020



.TODAY...East winds 5 to 10 knots veering southeast in the

afternoon. Seas 2 feet or less. Dominant period 7 seconds.

Isolated showers.

.TONIGHT...Northeast winds 5 to 10 knots. Seas 2 feet or less.

Dominant period 7 seconds. Isolated thunderstorms in the evening.

Scattered showers through the night.

.TUESDAY...North winds 5 to 10 knots backing southwest in the

afternoon. Seas 2 feet or less. Dominant period 7 seconds.

Isolated showers.

.TUESDAY NIGHT...Southwest winds 5 to 10 knots backing east after

midnight. Seas 2 feet or less. Dominant period 8 seconds.

Scattered showers.

.WEDNESDAY...East winds 5 to 10 knots. Seas 2 feet or less.

Dominant period 10 seconds. Scattered showers.

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

period 10 seconds. Scattered showers.

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

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

showers.



$$



AMZ741-192100-

Mona Passage Southward to 17N-

419 AM AST Mon Oct 19 2020



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

period 10 seconds. Isolated showers through the day.

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

period 10 seconds. Isolated showers through the night.

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

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

showers.

.TUESDAY NIGHT...East winds 5 to 10 knots. Seas 5 to 7 feet with

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

swell 4 to 6 feet after midnight. Scattered showers.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 4 to 6 feet with

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

swell 4 to 7 feet. Scattered showers.

.THURSDAY...Southeast winds 10 to 15 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 11 seconds. North

swell 4 to 8 feet. Scattered showers. Isolated thunderstorms.

.FRIDAY...East winds 10 to 15 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 11 seconds. North

swell 4 to 7 feet. Scattered showers.



$$



AMZ742-192100-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

419 AM AST Mon Oct 19 2020



.TODAY...Northeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant

period 10 seconds. Isolated showers through the day.

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

period 10 seconds.

.TUESDAY...East winds 5 to 10 knots backing northwest in the

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

Dominant period 10 seconds. Isolated showers in the morning, then

isolated thunderstorms in the afternoon.

.TUESDAY NIGHT...Northeast winds 5 to 10 knots veering southeast

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

feet. Dominant period 10 seconds. Isolated showers.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 4 to 6 feet with

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

swell 4 to 7 feet. Isolated showers.

.THURSDAY...Southeast winds 5 to 10 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 12 seconds.

Northeast swell 4 to 7 feet. Isolated thunderstorms, then isolated

showers.

.FRIDAY...East winds 5 to 10 knots. Seas 4 to 6 feet with

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

swell 4 to 7 feet. Isolated thunderstorms, then isolated showers.



$$



AMZ745-192100-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

419 AM AST Mon Oct 19 2020



.TODAY...Northeast winds 5 to 10 knots backing west in the

afternoon. Seas 2 feet or less. Dominant period 7 seconds.

.TONIGHT...Northeast winds 5 to 10 knots. Seas 2 feet or less.

Dominant period 7 seconds. Isolated showers through the night.

.TUESDAY...Northeast winds 5 to 10 knots backing west in the

afternoon. Seas 2 feet or less. Dominant period 10 seconds.

Isolated showers.

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

Dominant period 10 seconds. Isolated showers.

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

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

showers.

.THURSDAY...Southeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 12 seconds. Scattered showers.

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

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

showers.



$$

