000
FZNT02 KNHC 182206
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC FRI AUG 18.
24 HOUR FORECAST VALID 1800 UTC SAT AUG 19.
48 HOUR FORECAST VALID 1800 UTC SUN AUG 20.

.WARNINGS.

...CARIBBEAN TROPICAL STORM WARNING...
.TROPICAL STORM HARVEY NEAR 13.4N 62.9W 1005 MB AT 2100 UTC AUG 
18 MOVING W OR 275 DEG AT 18 KT. MAXIMUM SUSTAINED WINDS 35 KT 
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM N 
SEMICIRCLE AND 0 NM S SEMICIRCLE. SEAS TO 12 FT WITHIN 0 NM S 
SEMICIRCLE...150 NM NE QUADRANT AND 60 NM NW QUADRANT. ELSEWHERE 
WITHIN 300 NM N SEMICIRCLE AND 60 NM SE QUADRANT WINDS 20 TO 33 
KT. SEAS 8 TO 11 FT. SCATTERED TO NUMEROUS TSTMS FROM 11N TO 
15.5N BETWEEN 62W AND 66.5W.
.24 HOUR FORECAST TROPICAL STORM HARVEY NEAR 13.9N 69.3W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. LITTLE CHANGE IN 
RADIUS OF TROPICAL STORM FORCE WINDS. SEAS 12 FT OR GREATER 
WITHIN 90 NM NE QUADRANT...30 NM SE QUADRANT...0 NM SW QUADRANT 
AND 45 NM NW QUADRANT WITH SEAS TO 16 FT. ELSEWHERE WITHIN 240 
NM N SEMICIRCLE AND 150 NM SE QUADRANT WINDS 20 TO 33 KT. SEAS 8 
TO 11 FT. 
.48 HOUR FORECAST TROPICAL STORM HARVEY NEAR 14.5N 76.7W.
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 120 NM NE QUADRANT...75 NM SE QUADRANT...30 
NM SW QUADRANT AND 60 NM NW QUADRANT WITH SEAS TO 21 FT. 
ELSEWHERE WITHIN 270 NM NE AND 75 NM SW SEMICIRCLES WINDS 20 TO 
33 KT. SEAS 8 TO 11 FT.
.72 HOUR FORECAST TROPICAL STORM HARVEY NEAR 15.5N 83.5W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM HARVEY INLAND NEAR 17.5N 88.5W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
.120 HOUR FORECAST TROPICAL DEPRESSION HARVEY OVER WATER NEAR 
19.0N 92.0W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 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 18N52W 1010 MB MOVING NW 18 KT. WITHIN 300 
NM NE SEMICIRCLE WINDS 20 TO 30 KT. SEAS 8 TO 11 FT. SCATTERED 
TSTMS WITHIN 210 NM NE...90 NM SE...60 NM SW...AND 150 NM NW 
QUADRANTS.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
19.5N60.5W 1012 MB. WITHIN 270 NM NE SEMICIRCLE WINDS 20 TO 25 
KT. SEAS 8 TO 11 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
21.5N68W 1013 MB. WITHIN 240 NM NE SEMICIRCLE WINDS 20 TO 25 KT. 
SEAS 8 TO 10 FT.

.ATLC FROM 14N TO 19N BETWEEN 35W AND 38W WINDS 20 KT OR LESS.
SEAS 8 TO 9 FT IN MIXED NE AND S SWELL.
.24 HOUR FORECAST FROM 17N TO 21N BETWEEN 40W AND 48W WINDS 20 
TO 25 KT. SEAS 8 TO 10 FT.
.48 HOUR FORECAST FROM 19N TO 23N BETWEEN 47W AND 53W WINDS 20 
TO 25 KT. SEAS 8 TO 10 FT.

.ATLC 06 HOUR FORECAST WITHIN AREA BOUNDED BY 21N73W TO 21N70.5W 
TO 20N70.5W TO 20N73W TO 21N73W...INCLUDING APPROACH TO WINDWARD 
PASSAGE...E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.18 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.30 HOUR FORECAST WITHIN AREA BOUNDED BY 21N74W TO 21N70.5W TO 
20N70.5W TO 20N74W...INCLUDING APPROACH TO WINDWARD PASSAGE... 
NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 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.