High Seas Forecast
Issued by NWS

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000
FZNT02 KNHC 180233
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC FRI AUG 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC FRI AUG 18.
24 HOUR FORECAST VALID 0000 UTC SAT AUG 19.
48 HOUR FORECAST VALID 0000 UTC SUN AUG 20.

.WARNINGS.

..TROPICAL STORM WARNING...
.TROPICAL STORM HARVEY NEAR 13.0N 57.4W 1005 MB AT 0300 UTC AUG
18 MOVING W OR 270 DEG AT 16 KT. MAXIMUM SUSTAINED WINDS 35 KT
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM N
SEMICIRCLE AND 0 NM S SEMICIRCLE. SEAS TO 12 FT WITHIN 60 NM N
SEMICIRCLE AND 0 NM S SEMICIRCLE. ELSEWHERE WITHIN 270 NM N
SEMICIRCLE WINDS 20 TO 33 KT. SEAS 8 TO 11 FT.
.24 HOUR FORECAST TROPICAL STORM HARVEY NEAR 13.6N 63.3W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. LITTLE CHANGE IN
RADIUS OF TROPICAL STORM FORCE WINDS. SEAS 12 FT OR GREATER
WITHIN 75 NM NE QUADRANT WITH SEAS TO 13 FT. ELSEWHERE WITHIN
270 NM N AND 60 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 11
FT.
.48 HOUR FORECAST TROPICAL STORM HARVEY NEAR 14.1N 70.9W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE
WINDS WITHIN 60 NM N SEMICIRCLE AND 30 NM S SEMICIRCLE. SEAS 12
FT OR GREATER WITHIN 75 NM N SEMICIRCLE WITH SEAS TO 15 FT.
ELSEWHERE WITHIN 240 NM N AND 75 NM S SEMICIRCLES WINDS 20 TO 33
KT. SEAS 8 TO 11 FT.
.72 HOUR FORECAST TROPICAL STORM HARVEY NEAR 14.8N 78.6W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM HARVEY NEAR 16.0N 85.5W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT.
.120 HOUR FORECAST TROPICAL STORM HARVEY INLAND NEAR 17.5N
89.0W. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 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 16N46.5W 1009 MB MOVING WNW 17 KT. WITHIN
270 NM N SEMICIRCLE OF LOW WINDS 20 TO 25 KT. SEAS 8 TO 11 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
17.5N54W 1010 MB. WITHIN 270 NM NE SEMICIRCLE OF LOW WINDS 20 TO
30 KT. SEAS 8 TO 11 FT. ELSEWHERE FROM 17N TO 22N BETWEEN 48W
AND 58W WINDS 20 KT OR LESS. SEAS TO 9 FT IN NE TO E SWELL.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
19.5N61.5W 1011 MB. WITHIN 210 NM NE SEMICIRCLE OF LOW WINDS 20
TO 30 KT. SEAS 8 TO 11 FT. ELSEWHERE FROM 17N TO 23N BETWEEN 54W
AND 66W WINDS 20 KT OR LESS. SEAS TO 9 FT IN NE TO E SWELL.

.ATLC AND CARIBBEAN TROPICAL WAVE ALONG 71W-72W S OF 24N.
CARIBBEAN N OF 17N BETWEEN 70W AND 76.5W...INCLUDING WINDWARD
PASSAGE...AND ATLC S OF 22N BETWEEN 68W AND 74W WINDS 20 TO 25
KT. SEAS TO 8 FT. SCATTERED TO NUMEROUS SHOWERS AND TSTMS FROM
17N TO 25N BETWEEN 66W AND 71W.
.24 HOUR FORECAST TROPICAL WAVE ALONG 76W-77W S OF 24N. FROM 18N
TO 22N BETWEEN 67W AND 74W...INCLUDING MONA PASSAGE...E TO SE
WINDS 20 TO 25 KT...EXCEPT NE WINDS MONA PASSAGE. SEAS TO 8 FT.
.42 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.ATLC 24 HOUR FORECAST FROM 14N TO 19N BETWEEN 35W AND 39W NE TO
E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST FROM 15N TO 20N BETWEEN 41W AND 51W NE TO E
WINDS 20 TO 25 KT. SEAS TO 10 FT.

.CARIBBEAN 24 HOUR FORECAST FROM 11N TO 13N BETWEEN 70W AND 75W
NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.36 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 STRIPLING. NATIONAL HURRICANE CENTER.



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