High Seas Forecast
Issued by NWS

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000
FZNT02 KNHC 172209
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC THU AUG 17.
24 HOUR FORECAST VALID 1800 UTC FRI AUG 18.
48 HOUR FORECAST VALID 1800 UTC SAT AUG 19.

.WARNINGS.

..TROPICAL STORM WARNING...
.TROPICAL STORM HARVEY NEAR 13.1N 55.8W 1006 MB AT 2100 UTC AUG
17 MOVING W OR 270 DEG AT 16 KT. MAXIMUM SUSTAINED WINDS 35 KT
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 30 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 13.4N 61.6W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE
WINDS WITHIN 40 NM N SEMICIRCLE AND 0 NM S SEMICIRCLE. 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 14.0N 68.8W.
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 90 NM N SEMICIRCLE WITH SEAS TO 14 FT.
ELSEWHERE WITHIN 240 NM N AND 90 NM S SEMICIRCLES WINDS 20 TO 33
KT. SEAS 8 TO 11 FT.
.72 HOUR FORECAST TROPICAL STORM HARVEY NEAR 14.5N 76.5W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM HARVEY NEAR 15.5N 83.5W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT.
.120 HOUR FORECAST TROPICAL STORM HARVEY INLAND NEAR 17.0N
88.5W. 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 16N45W 1009 MB MOVING WNW 15 KT. WITHIN 270
NM N SEMICIRCLE OF LOW WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
17N52.5W 1010 MB. WITHIN 240 NM NE SEMICIRCLE OF LOW WINDS 20 TO
30 KT. SEAS 8 TO 11 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
19N59.5W 1011 MB. WITHIN 210 NM NE SEMICIRCLE OF LOW WINDS 20 TO
30 KT. SEAS 8 TO 11 FT.

.ATLC AND CARIBBEAN TROPICAL WAVE ALONG 70W-71W S OF 24N.
CARIBBEAN N OF 17N BETWEEN 67W AND 76W...INCLUDING WINDWARD AND
MONA PASSAGES...AND ATLC S OF 23N BETWEEN 69W AND 74W WINDS 20
TO 25 KT. SEAS TO 8 FT. SCATTERED TO NUMEROUS SHOWERS AND TSTMS.
.24 HOUR FORECAST TROPICAL WAVE ALONG 75W-76W S OF 24N. FROM 16N
TO 22N BETWEEN 70W AND 75W E TO SE WINDS 20 TO 25 KT. SEAS LESS
THAN 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 37W
NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST FROM 15N TO 20N BETWEEN 39W AND 48W NE TO E
WINDS 20 TO 25 KT. SEAS TO 9 FT.

.CARIBBEAN 30 HOUR FORECAST FROM 11N TO 13N BETWEEN 70W AND 75W
NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.42 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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