Coastal Waters Forecast
Issued by NWS San Juan, PR

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FZCA52 TJSJ 190955
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
555 AM AST Tue Sep 19 2017

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.

AMZ700-192230-
555 AM AST Tue Sep 19 2017

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
Major Hurricane Maria will cross directly through the local waters.

Maria is a Category 5 hurricane.
THIS WILL BE A VERY DANGEROUS STORM.

Hurricane Maria will move across the local area as major hurricane
tonight through Thursday with dramatically increasing wind and very
dangerous seas. Conditions will remain hazardous beyond Thursday.

$$

AMZ710-192230-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
555 AM AST Tue Sep 19 2017

...HURRICANE WARNING IN EFFECT...

.TODAY... Tropical storm conditions expected with hurricane
conditions possible. Northeast winds around 30 knots. Seas 8 to 10
feet with occasional seas up to 11 feet. Dominant Period 11
seconds. Northwest swell 4 to 8 feet. Showers and isolated
thunderstorms.
.TONIGHT... Tropical storm conditions expected with hurricane
conditions possible. Northeast winds 30 to 40 knots. Gusts up to
50 knots after midnight. Seas 12 to 14 feet with occasional seas
up to 18 feet. Dominant Period 11 seconds. North swell 5 to 10
feet. Showers and numerous thunderstorms.
.WEDNESDAY... Hurricane conditions expected. Northeast winds 40 to
50 knots with gusts to around 60 knots becoming east 50 to 60
knots with gusts to around 70 knots in the afternoon. Seas 16 to
18 feet with occasional seas up to 22 feet building to over 20
feet with occasional seas up to 28 feet in the afternoon. Dominant
Period 11 seconds. North swell 8 to 13 feet. Showers and numerous
thunderstorms.
.WEDNESDAY NIGHT... Hurricane conditions expected. Southeast winds
60 to 80 knots veering south 70 to 80 knots after midnight. Gusts
up to 95 knots. Seas over 20 feet with occasional seas up to 34
feet building to over 20 feet with occasional seas up to 47 feet
after midnight. Dominant Period 11 seconds. North swell 12 to 17
feet increasing to west 17 to 22 feet after midnight. Showers and
numerous thunderstorms.
.THURSDAY... Hurricane conditions possible. South winds 40 to 45
knots with gusts to around 55 knots easing to 25 to 30 knots in
the afternoon. Seas over 20 feet with occasional seas up to 47
feet subsiding to over 20 feet with occasional seas up to 39 Feet.
Dominant Period 11 seconds. West swell 16 to 21 feet. Showers and
numerous thunderstorms.
.THURSDAY NIGHT... Tropical storm conditions possible. Showers and
scattered thunderstorms.
.FRIDAY... Tropical storm conditions possible. Showers and
scattered thunderstorms.
.FRIDAY NIGHT...Southeast winds 15 to 20 knots. Seas 6 to 8 feet
with occasional seas up to 10 feet. Dominant Period 11 seconds.
Northwest swell 4 to 7 feet. Scattered showers and isolated
thunderstorms.
.SATURDAY...Southeast winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 11 seconds.
Northwest swell 4 to 6 feet. Scattered showers in the morning.
Isolated thunderstorms through the day.

$$

AMZ712-192230-
Coastal Waters of Northern Puerto Rico out 10 NM-
555 AM AST Tue Sep 19 2017

...HURRICANE WARNING IN EFFECT...

.TODAY...Northeast winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 11 seconds.
Northwest swell 4 to 5 feet. Numerous showers and isolated
thunderstorms.
.TONIGHT... Tropical storm conditions expected with hurricane
conditions possible. Northeast winds 25 to 30 knots becoming north
40 to 45 knots with gusts to around 55 knots after midnight. Seas
6 to 8 feet with occasional seas up to 10 feet. Dominant Period 10
seconds. North swell 4 to 5 feet. Showers and numerous
thunderstorms.
.WEDNESDAY... Hurricane conditions expected. North winds 75 to 95
knots with gusts to around 115 knots rising to 90 to 110 knots
with gusts to around 135 knots in the afternoon. Seas 16 to 18
feet with occasional seas up to 22 feet building to over 20 feet
with occasional seas up to 34 feet in the afternoon. Dominant
Period 11 seconds. Northeast swell 4 to 8 feet increasing to 12 to
17 Feet. Showers and numerous thunderstorms.
.WEDNESDAY NIGHT... Hurricane conditions expected. South winds 90
to 110 knots with gusts to around 130 knots easing to 40 to 50
knots with gusts to around 60 knots after midnight. Seas over 20
feet with occasional seas up to 50 feet. Dominant Period 11
seconds. Northeast swell 18 to 23 feet shifting to the west 17 to
22 feet after midnight. Showers and numerous thunderstorms.
.THURSDAY... Hurricane conditions possible. South winds 30 to 35
knots easing to 20 to 25 knots in the afternoon. Seas over 20 feet
with occasional seas up to 43 feet subsiding to 16 to 18 feet with
occasional seas up to 23 feet in the afternoon. Dominant Period 11
seconds. West swell 15 to 20 feet becoming northwest 8 to 13 feet
in the afternoon. Showers in the morning. Numerous thunderstorms
through the day.
.THURSDAY NIGHT... Tropical storm conditions possible. Scattered
thunderstorms.
.FRIDAY...South winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 10 seconds.
Northwest swell 4 to 6 feet. Isolated thunderstorms through the
day. Scattered showers in the afternoon.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 4 to 6 feet
with occasional seas up to 8 feet. Dominant Period 11 seconds.
Northwest swell 4 to 5 feet. Isolated showers.
.SATURDAY...Southeast winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds.
Northwest swell around 4 feet. Scattered showers through the day.
Isolated thunderstorms in the afternoon.

$$

AMZ715-192230-
Coastal Waters of Northern USVI and Culebra out 10 NM-
555 AM AST Tue Sep 19 2017

...HURRICANE WARNING IN EFFECT...

.TODAY... Tropical storm conditions expected with hurricane
conditions possible. Northeast winds around 30 knots. Seas 6 to 8
feet with occasional seas up to 10 feet. Dominant Period 11
seconds. Northwest swell 4 to 7 feet in the afternoon. Showers and
scattered thunderstorms.
.TONIGHT... Hurricane conditions expected. Northeast winds 35 to
40 knots with gusts to around 50 knots rising to 45 to 55 knots
with gusts to around 65 knots after midnight. Seas 12 to 14 feet
with occasional seas up to 17 feet. Dominant Period 11 seconds.
North swell 5 to 10 feet. Showers and numerous thunderstorms.
.WEDNESDAY... Hurricane conditions expected. Southeast winds 45 to
60 knots. Gusts up to 75 knots subsiding to 65 knots in the
afternoon. Seas over 20 feet with occasional seas up to 29 feet.
Dominant Period 11 seconds. North swell 8 to 13 feet. Showers and
numerous thunderstorms.
.WEDNESDAY NIGHT... Tropical storm conditions expected with
hurricane conditions possible. South winds 30 to 35 knots. Seas
over 20 feet with occasional seas up to 29 feet subsiding to 13 to
15 feet with occasional seas up to 19 feet after midnight.
Dominant Period 11 seconds. Northwest swell 9 to 14 feet subsiding
to 4 to 7 feet after midnight. Showers and numerous thunderstorms.
.THURSDAY... Tropical storm conditions possible. South winds 20 to
25 knots. Seas 8 to 10 feet with occasional seas up to 11 feet.
Dominant Period 10 seconds. Northwest swell 4 to 5 feet. Showers
and numerous thunderstorms.
.THURSDAY NIGHT...Southeast winds 15 to 20 knots. Seas 6 to 8 feet
with occasional seas up to 10 feet. Dominant Period 10 seconds.
Northwest swell 4 to 5 feet. Scattered thunderstorms through the
night. Scattered showers after midnight.
.FRIDAY...Southeast winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 10 seconds.
Northwest swell 4 to 5 feet. Showers and scattered thunderstorms.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 5 feet
with occasional seas up to 6 feet. Dominant Period 11 seconds.
North swell 4 to 5 feet. Scattered showers and isolated
thunderstorms.
.SATURDAY...Southeast winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds.
Northwest swell around 4 feet. Scattered showers and isolated
thunderstorms.

$$

AMZ722-192230-
Anegada Passage Southward to 17N-
555 AM AST Tue Sep 19 2017

...HURRICANE WARNING IN EFFECT...

.TODAY... Hurricane conditions expected. Northeast winds 30 to 35
knots rising to 50 to 60 knots with gusts to around 75 knots in
the afternoon. Seas 16 to 18 feet with occasional seas up to 20
feet building to over 20 feet with occasional seas up to 34 feet
in the afternoon. Dominant Period 11 seconds. Southeast swell 6 to
11 feet increasing to 11 to 16 feet in the afternoon. Showers and
scattered thunderstorms.
.TONIGHT... Hurricane conditions expected. East winds 100 to 120
knots with gusts to around 145 knots becoming southeast 45 to 55
knots with gusts to around 70 knots after midnight. Seas over 20
feet with occasional seas up to 38 feet. Dominant Period 11
seconds. Northeast swell 13 to 18 feet. Showers and numerous
thunderstorms.
.WEDNESDAY... Tropical storm conditions expected with hurricane
conditions possible. South winds 30 to 40 knots easing to 25 to 30
knots in the afternoon. Seas over 20 feet with occasional seas up
to 38 feet subsiding to over 20 feet with occasional seas up to 29
feet in the afternoon. Dominant Period 11 seconds. West swell 11
to 16 feet. Showers and numerous thunderstorms.
.WEDNESDAY NIGHT... Tropical storm conditions expected with
hurricane conditions possible. South winds around 30 knots. Seas
16 to 18 feet with occasional seas up to 22 feet. Dominant Period
11 seconds. West swell 6 to 11 feet. Numerous thunderstorms
through the night. Showers after midnight.
.THURSDAY...Southeast winds 15 to 20 knots. Seas 12 to 14 feet
with occasional seas up to 17 feet. Dominant Period 11 seconds.
West swell 5 to 10 feet. Showers and numerous thunderstorms.
.THURSDAY NIGHT...Southeast winds 15 to 20 knots. Seas 8 to 10
feet with occasional seas up to 11 feet. Dominant Period 10
seconds. West swell 4 to 8 feet in the evening. Numerous showers
and scattered thunderstorms.
.FRIDAY...Southeast winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 11 seconds. West
swell 4 to 5 feet in the afternoon. Numerous showers and scattered
thunderstorms.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 4 to 6 feet
with occasional seas up to 8 feet. Dominant Period 11 seconds.
Northwest swell 4 to 5 feet. Scattered showers and isolated
thunderstorms.
.SATURDAY...Southeast winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds.
Northwest swell around 4 feet. Isolated thunderstorms in the
morning. Scattered showers through the day.

$$

AMZ725-192230-
Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out
10 NM-
555 AM AST Tue Sep 19 2017

...HURRICANE WARNING IN EFFECT...

.TODAY... Tropical storm conditions expected with hurricane
conditions possible. Northeast winds 20 to 25 knots rising to 30
to 35 knots in the afternoon. 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 in the afternoon. Dominant Period 11 seconds.
Southeast swell around 4 feet increasing to 5 to 10 feet in the
afternoon. Showers and scattered thunderstorms.
.TONIGHT... Hurricane conditions expected. Northeast winds 40 to
45 knots with gusts to around 55 knots rising to 50 to 70 knots
with gusts to around 85 knots after midnight. Seas over 20 feet
with occasional seas up to 29 feet. Dominant Period 11 seconds.
East swell 9 to 14 feet. Showers and numerous thunderstorms.
.WEDNESDAY... Hurricane conditions expected. Southeast winds 95 to
115 knots with gusts to around 140 knots becoming south 45 to 55
knots with gusts to around 65 knots in the afternoon. Seas over 20
feet with occasional seas up to 48 feet. Dominant Period 11
seconds. Northeast swell 17 to 22 feet. Showers and numerous
thunderstorms.
.WEDNESDAY NIGHT... Tropical storm conditions expected with
hurricane conditions possible. South winds 30 to 35 knots. Seas
over 20 feet with occasional seas up to 48 feet subsiding to over
20 feet with occasional seas up to 31 feet after midnight.
Dominant Period 11 seconds. Northeast swell 17 to 22 feet becoming
north 10 to 15 feet after midnight. Showers and numerous
thunderstorms.
.THURSDAY... Tropical storm conditions possible. South winds 20 to
25 knots. Seas 12 to 14 feet with occasional seas up to 18 feet
subsiding to 8 to 10 feet with occasional seas up to 11 Feet.
Dominant Period 10 seconds. West swell 4 to 9 feet. Showers and
numerous thunderstorms.
.THURSDAY NIGHT...Southeast winds 15 to 20 knots. Seas 8 to 10
feet with occasional seas up to 11 feet. Dominant Period 10
seconds. West swell around 4 feet. Showers and numerous
thunderstorms.
.FRIDAY...Southeast winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 11 seconds. West
swell around 4 feet. Showers and numerous thunderstorms.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 4 to 6 feet
with occasional seas up to 8 feet. Dominant Period 11 seconds.
Northwest swell around 4 feet shifting to the northeast after
midnight. Scattered showers and isolated thunderstorms.
.SATURDAY...Southeast winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds. North
swell around 4 feet in the afternoon. Scattered showers and
isolated thunderstorms.

$$

AMZ732-192230-
Caribbean Waters of Puerto Rico from 10 NM to 17N-
555 AM AST Tue Sep 19 2017

...HURRICANE WARNING IN EFFECT...

.TODAY... Tropical storm conditions with hurricane conditions
possible. Northeast winds 25 to 30 knots becoming north 35 to 40
knots with gusts to around 50 knots in the afternoon. Seas 10 to
12 feet with occasional seas up to 14 feet building to 16 to 18
feet with occasional seas up to 23 feet in the afternoon. Dominant
Period 11 seconds. East swell 5 to 10 feet. Showers and scattered
thunderstorms.
.TONIGHT... Hurricane conditions expected. North winds 50 to 60
knots with gusts to around 75 knots. Seas over 20 feet with
occasional seas up to 32 feet building to over 20 feet with
occasional seas up to 46 feet after midnight. Dominant Period 11
seconds. East swell 9 to 14 feet increasing to northeast 15 to 20
feet after midnight. Showers and numerous thunderstorms.
.WEDNESDAY... Hurricane conditions expected. Southwest winds 45 to
55 knots with gusts to around 70 knots easing to 35 to 40 knots
with gusts to around 50 knots in the afternoon. Seas over 20 feet
with occasional seas up to 47 feet. Dominant Period 11 seconds.
East swell 15 to 20 feet. Showers and numerous thunderstorms.
.WEDNESDAY NIGHT... Tropical storm conditions expected with
hurricane conditions possible. South winds around 30 knots. Seas
over 20 feet with occasional seas up to 38 feet subsiding to over
20 feet with occasional seas up to 31 feet after midnight.
Dominant Period 11 seconds. South swell 12 to 17 feet shifting to
the west 9 to 14 feet after midnight. Showers and numerous
thunderstorms.
.THURSDAY... Tropical storm conditions possible. South winds 20 to
25 knots. Seas 18 to 20 feet with occasional seas up to 25 feet
subsiding to 12 to 14 feet with occasional seas up to 18 Feet.
Dominant Period 11 seconds. West swell 6 to 11 feet. Showers and
numerous thunderstorms.
.THURSDAY NIGHT...Southeast winds 15 to 20 knots. Seas 10 to 12
feet with occasional seas up to 14 feet. Dominant Period 10
seconds. West swell 4 to 7 feet. Showers and numerous
thunderstorms.
.FRIDAY...Southeast winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 10 seconds. West
swell up to 4 Feet. Showers and numerous thunderstorms.
.FRIDAY NIGHT...Southeast winds 15 to 20 knots. Seas 5 to 7 feet
with occasional seas up to 9 feet. Dominant Period 7 seconds.
Scattered showers and isolated thunderstorms.
.SATURDAY...Southeast winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 11 seconds. West
swell up to 4 feet in the afternoon. Scattered showers in the
morning. Isolated thunderstorms through the day.

$$

AMZ735-192230-
Coastal Waters of Southern Puerto Rico out 10 NM-
555 AM AST Tue Sep 19 2017

...HURRICANE WARNING IN EFFECT...

.TODAY...North winds 15 to 20 knots. Seas 6 to 8 feet with
occasional seas up to 10 feet. Dominant Period 11 seconds. East
swell 4 to 8 feet. Isolated showers in the morning, then isolated
thunderstorms in the afternoon.
.TONIGHT... Tropical storm conditions expected with hurricane
conditions possible. North winds 20 to 25 knots rising to 40 to 45
knots with gusts to around 55 knots after midnight. Seas 13 to 15
feet with occasional seas up to 19 feet. Dominant Period 12
seconds. East swell 5 to 10 feet. Showers and numerous
thunderstorms.
.WEDNESDAY... Hurricane conditions expected. West winds 45 to 55
knots with gusts to around 70 knots. Seas over 20 feet with
occasional seas up to 37 feet building to over 20 feet with
occasional seas up to 43 feet in the afternoon. Dominant Period 11
seconds. East swell 14 to 19 feet. Showers and numerous
thunderstorms.
.WEDNESDAY NIGHT... Tropical storm conditions expected with
hurricane conditions possible. Southwest winds 30 to 40 knots.
Gusts up to 50 knots in the evening. Seas over 20 feet with
occasional seas up to 43 feet. Dominant Period 11 seconds.
Southeast swell 15 to 20 feet. Showers and numerous thunderstorms.
.THURSDAY... Tropical storm conditions possible. South winds 20 to
25 knots. Seas over 20 feet with occasional seas up to 31 feet
subsiding to 13 to 15 feet with occasional seas up to 19 Feet.
Dominant Period 11 seconds. Southeast swell 11 to 16 feet shifting
to the west 7 to 12 feet in the afternoon. Showers and numerous
thunderstorms.
.THURSDAY NIGHT...Southeast winds 15 to 20 knots. Seas 10 to 12
feet with occasional seas up to 14 feet. Dominant Period 8
seconds. West swell 4 to 8 feet. Showers and numerous
thunderstorms.
.FRIDAY...Southeast winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 7 seconds. Showers
and numerous thunderstorms.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 4 to 6 feet
with occasional seas up to 8 feet. Dominant Period 7 seconds.
Scattered showers and isolated thunderstorms.
.SATURDAY...Southeast winds 10 to 15 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 10 seconds. Isolated
thunderstorms in the morning. Scattered showers through the day.

$$

AMZ741-192230-
Mona Passage Southward to 17N-
555 AM AST Tue Sep 19 2017

...HURRICANE WARNING IN EFFECT...

.TODAY...Northeast winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 11 seconds. East
swell 4 to 6 feet. Isolated showers.
.TONIGHT... Tropical storm conditions expected with hurricane
conditions possible. North winds 20 to 25 knots. Seas 10 to 12
feet with occasional seas up to 14 feet. Dominant Period 11
seconds. East swell 4 to 8 feet. Numerous showers and scattered
thunderstorms.
.WEDNESDAY... Tropical storm conditions expected with hurricane
conditions possible. North winds 25 to 30 knots becoming northwest
35 to 40 knots in the afternoon. Seas 18 to 20 feet with
occasional seas up to 24 feet. Dominant Period 11 seconds.
Northeast swell 6 to 11 feet. Showers and numerous thunderstorms.
.WEDNESDAY NIGHT... Tropical storm conditions expected with
hurricane conditions possible. West winds 40 to 45 knots with
gusts to around 55 knots. Seas over 20 feet with occasional seas
up to 28 feet building to over 20 feet with occasional seas up to
51 feet after midnight. Dominant Period 11 seconds. Northeast
swell 8 to 13 feet increasing to north 17 to 22 feet after
midnight. Showers and numerous thunderstorms.
.THURSDAY... Hurricane conditions possible. South winds 30 to 35
knots. Seas over 20 feet with occasional seas up to 51 feet
subsiding to over 20 feet with occasional seas up to 32 Feet.
Dominant Period 11 seconds. North swell 17 to 22 feet subsiding to
12 to 17 feet in the afternoon. Showers and numerous
thunderstorms.
.THURSDAY NIGHT... Tropical storm conditions possible. Showers and
numerous thunderstorms.
.FRIDAY...South winds 20 to 25 knots. Seas 6 to 8 feet with
occasional seas up to 10 feet. Dominant Period 10 seconds. West
swell 4 to 7 feet. Showers and scattered thunderstorms.
.FRIDAY NIGHT...Southeast winds 15 to 20 knots. Seas 5 to 7 feet
with occasional seas up to 9 feet. Dominant Period 11 seconds.
West swell 4 to 6 feet. Scattered showers and isolated
thunderstorms.
.SATURDAY...Southeast winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 11 seconds. North
swell up to 5 feet. Isolated thunderstorms in the morning.
Scattered showers through the day.

$$

AMZ742-192230-
Coastal Waters OF Northwestern Puerto Rico out 10 NM-
555 AM AST Tue Sep 19 2017

...HURRICANE WARNING IN EFFECT...

.TODAY...Northeast winds 15 to 20 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 11 seconds. Isolated
showers in the morning, then isolated thunderstorms in the
afternoon.
.TONIGHT... Tropical storm conditions expected with hurricane
conditions possible. Northeast winds 20 to 25 knots. Seas 3 to 5
feet with occasional seas up to 6 feet. Dominant Period 11
seconds. Northwest swell around 4 feet. Numerous showers and
scattered thunderstorms.
.WEDNESDAY... Hurricane conditions expected. North winds 30 to 35
knots becoming northwest 40 to 50 knots with gusts to around 65
knots in the afternoon. 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 in the afternoon. Dominant Period 11 seconds. Northeast swell
4 to 6 feet. Showers and numerous thunderstorms.
.WEDNESDAY NIGHT... Hurricane conditions expected. West winds 50
to 60 knots with gusts to around 70 knots becoming southwest 40 to
50 knots with gusts to around 60 knots after midnight. Seas over
20 feet with occasional seas up to 34 feet building to over 20
feet with occasional seas up to 51 feet after midnight. Dominant
Period 11 seconds. North swell 12 to 17 feet increasing to 19 to
24 feet after midnight. Showers and numerous thunderstorms.
.THURSDAY... Hurricane conditions possible. South winds 30 to 35
knots. Seas over 20 feet with occasional seas up to 51 feet
subsiding to over 20 feet with occasional seas up to 33 Feet.
Dominant Period 11 seconds. Northwest swell 23 to 28 feet
decreasing to 15 to 20 feet in the afternoon. Showers and numerous
thunderstorms.
.THURSDAY NIGHT... Tropical storm conditions possible. Showers and
numerous thunderstorms.
.FRIDAY...South winds 20 to 25 knots. Seas 6 to 8 feet with
occasional seas up to 10 feet. Dominant Period 10 seconds.
Northwest swell 4 to 7 feet. Scattered showers and isolated
thunderstorms.
.FRIDAY NIGHT...Southeast winds 15 to 20 knots. Seas 4 to 6 feet
with occasional seas up to 8 feet. Dominant Period 10 seconds.
Northwest swell 4 to 5 feet. Isolated showers.
.SATURDAY...Southeast winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds.
Northwest swell around 4 feet. Scattered showers through the day.
Isolated thunderstorms in the afternoon.

$$

AMZ745-192230-
Coastal Waters OF Southwestern Puerto Rico out 10 NM-
555 AM AST Tue Sep 19 2017

...HURRICANE WARNING IN EFFECT...

.TODAY...Northeast winds 15 to 20 knots. Seas 1 to 3 feet.
Dominant Period 11 seconds. Isolated showers.
.TONIGHT... Tropical storm conditions possible with hurricane
conditions also possible. North winds 15 to 20 knots. Seas 2 to 4
feet with occasional seas up to 5 feet. Dominant Period 11
seconds. Numerous showers and scattered thunderstorms.
.WEDNESDAY... Tropical storm conditions expected with hurricane
conditions possible. North winds 30 to 35 knots backing northwest
35 to 45 knots with gusts to around 55 knots in the afternoon.
Seas 8 to 10 feet with occasional seas up to 13 feet. Dominant
Period 11 seconds. Southwest swell 4 to 6 feet shifting to the
north 4 to 9 Feet. Showers and numerous thunderstorms.
.WEDNESDAY NIGHT... Tropical storm conditions expected with
hurricane conditions possible. Southwest winds 35 to 45 knots with
gusts to around 55 knots. Seas over 20 feet with occasional seas
up to 28 feet building to over 20 feet with occasional seas up to
43 feet after midnight. Dominant Period 11 seconds. North swell 10
to 15 feet increasing to 16 to 21 feet after midnight. Showers and
numerous thunderstorms.
.THURSDAY... Tropical storm conditions possible. South winds
around 30 knots. Seas over 20 feet with occasional seas up to 43
feet subsiding to over 20 feet with occasional seas up to 27 Feet.
Dominant Period 11 seconds. Northwest swell 19 to 24 feet
decreasing to 12 to 17 feet in the afternoon. Showers and numerous
thunderstorms.
.THURSDAY NIGHT... Tropical storm conditions possible. South winds
20 to 25 knots. Seas 12 to 14 feet with occasional seas up to 18
feet subsiding to 6 to 8 feet with occasional seas up to 10 feet
after midnight. Dominant Period 10 seconds. Northwest swell 4 to 8
feet. Showers and numerous thunderstorms.
.FRIDAY...South winds 20 to 25 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 10 seconds.
Northwest swell 4 to 7 feet. Showers and scattered thunderstorms.
.FRIDAY NIGHT...Southeast winds 15 to 20 knots. Seas 4 to 6 feet
with occasional seas up to 8 feet. Dominant Period 10 seconds.
West swell around 4 feet in the evening. Isolated showers.
.SATURDAY...Southeast winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds.
Northwest swell around 4 feet. Isolated showers.

$$



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