000
FZNT02 KNHC 171527
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC THU AUG 17 2017

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE
HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE
MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.

SECURITE

ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND
GULF OF MEXICO

SYNOPSIS VALID 1200 UTC THU AUG 17.
24 HOUR FORECAST VALID 1200 UTC FRI AUG 18.
48 HOUR FORECAST VALID 1200 UTC SAT AUG 19.

.WARNINGS.

..TROPICAL STORM WARNING...
.POTENTIAL TROPICAL CYCLONE NINE NEAR 13.1N 54.1W 1008 MB AT 
1500 UTC AUG 17 MOVING W OR 270 DEG AT 15 KT. MAXIMUM SUSTAINED 
WINDS 30 KT GUSTS 40 KT.  ELSEWHERE WITHIN 240 NM N SEMICIRCLE 
WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.   
.24 HOUR FORECAST TROPICAL STORM NINE NEAR 13.2N 59.8W. MAXIMUM 
SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS 
WITHIN 50 NM N SEMICIRCLE. ELSEWHERE WITHIN 240 NM N 
AND 90 NM S SEMICIRCLES WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST TROPICAL STORM NINE NEAR 13.9N 66.7W. MAXIMUM 
SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS 
WITHIN 60 NM N SEMICIRCLE AND 30 NM S SEMICIRCLE. SEAS 12 FT OR 
GREATER WITHIN 75 NM N AND 30 NM S SEMICIRCLES WITH SEAS TO 14 
FT. ELSEWHERE WITHIN 240 NM N AND 90 NM S SEMICIRCLES WINDS 20 
TO 30 KT. SEAS 8 TO 12 FT.
.72 HOUR FORECAST TROPICAL STORM NINE NEAR 14.5N 74.5W. MAXIMUM 
SUSTAINED WINDS 55 KT GUSTS 65 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE NINE NEAR 15.5N 82.0W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.
.120 HOUR FORECAST HURRICANE NINE NEAR 17.0N 87.5W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE 
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE 
AND INTENSITY.

.SYNOPSIS AND FORECAST.

.ATLC LOW PRES NEAR 15N42W 1009 MB. WITHIN 240 NM N SEMICIRCLE 
OF LOW WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
16N50W 1010 MB. WITHIN 240 NM N SEMICIRCLE OF LOW WINDS 20 TO 30 
KT. SEAS 8 TO 11 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
17N55W 1010 MB. WITHIN 240 NM N SEMICIRCLE OF LOW WINDS 20 TO 30 
KT. SEAS 8 TO 11 FT.

.ATLC AND CARIBBEAN TROPICAL WAVE FROM 23N66W TO 12N71W. 
CARIBBEAN N OF 17N BETWEEN 70W AND 76W INCLUDING WINDWARD 
PASSAGE AND ATLC S OF 22N BETWEEN 65W AND 71W NE TO E WINDS 20 
TO 25 KT. SEAS TO 8 FT. SCATTERED TO NUMEROUS SHOWERS AND TSTMS.
.24 HOUR FORECAST TROPICAL WAVE FROM 22N73W TO 12N76W. CARIBBEAN 
N OF 17N BETWEEN 70W AND 76W AND ATLC S OF 22N BETWEEN 7W AND 
77W E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.ATLC 36 HOUR FORECAST WITHIN AREA BOUNDED BY 21N35W TO 13N35W 
TO 13N39W TO 21N41W TO 21N35W WINDS 20 KT OR LESS. SEAS 8 FT.
.48 HOUR FORECAST WITHIN AREA BOUNDED BY 18N38W TO 13N38W TO 
13N44W TO 18N44W TO 18N38W WINDS 20 KT OR LESS. SEAS 8 FT.

.CARIBBEAN WITHIN AREA BOUNDED BY 13N77W TO 13N74W TO 11N74W TO
11N77W TO 13N77W...INCLUDING WITHIN 90 NM OF COAST OF
COLOMBIA... NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.06 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

$$
.FORECASTER COBB. NATIONAL HURRICANE CENTER.