732 
FZNT02 KNHC 212056
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC THU SEP 21 2023

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 SEP 21.
24 HOUR FORECAST VALID 1800 UTC FRI SEP 22.
48 HOUR FORECAST VALID 1800 UTC SAT SEP 23.

.WARNINGS.

...TROPICAL STORM WARNING...
.POTENTIAL TROPICAL CYCLONE SIXTEEN NEAR 29.2N 75.9W 1012 MB AT 
2100 UTC SEP 21 MOVING N OR 360 DEG AT 7 KT. MAXIMUM SUSTAINED 
WINDS 30 KT GUSTS 40 KT. WITHIN 180 NM E AND 90 NM W SEMICIRCLES 
WINDS 20 TO 30 KT. SEAS 8 TO 11 FT.  
.12 HOUR FORECAST POTENTIAL TROPICAL CYCLONE SIXTEEN NEAR 30.8N 
75.8W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT.
.24 HOUR FORECAST POTENTIAL TROPICAL CYCLONE SIXTEEN N OF 
AREA NEAR 32.6N 76.0W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.
TROPICAL STORM FORCE WINDS WITHIN 300 NM NE QUADRANT...90 NM SE 
QUADRANT...0 NM SW QUADRANT...AND 180 NM NW QUADRANT. OVER 
FORECAST WATERS N OF 30N BETWEEN 72W AND 78W WINDS 20 TO 33 KT. 
SEAS 8 TO 12 FT. ELSEWHERE N OF 28N W OF 77W NW TO N WINDS 20 TO 
25 KT. SEAS 8 TO 12 FT PRIMARILY IN N SWELL. SEE PART 1.
.48 HOUR FORECAST TROPICAL STORM SIXTEEN N OF AREA NEAR 35.6N 
77.0W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM 
FORCE WINDS WITHIN 410 NM NE QUADRANT...120 NM SE QUADRANT...90 
NM SW QUADRANT...AND 80 NM NW QUADRANT. OVER FORECAST N OF 30N 
BETWEEN 70W AND 77W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED 
SWELL. SEE PART 1.
.72 HOUR FORECAST POST-TROPICAL SIXTEEN NEAR 38.7N 76.1W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL SIXTEEN NEAR 40.0N 74.0W.
MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.
.120 HOUR FORECAST...DISSIPATED.

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 18 HOUR FORECAST FROM 15N TO 19N E OF 36W NE TO E WINDS 20 
TO 25 KT. SEAS 8 TO 9 FT. 
.24 HOUR FORECAST FROM 15N TO 19N E OF 38W NE TO E WINDS 20 TO 
25 KT. SEAS 8 TO 10 FT. 
.36 HOUR FORECAST LOW PRES NEAR 15N38W 1008 MB. FROM 14N TO 20N 
E OF 42W NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 11 FT. 
.48 HOUR FORECAST LOW PRES NEAR 15N41W 1007 MB. FROM 15N TO 18N 
BETWEEN 38W AND 44W NE TO E WINDS 20 TO 30 KT. SEAS 9 TO 11 FT. 
ELSEWHERE FROM 13N TO 21N E OF 45W WINDS 20 KT OR LESS. SEAS 8 
TO 9 FT IN NE SWELL.

.CARIBBEAN FROM 11N TO 13N BETWEEN 72W AND 76W NE TO E WINDS 20 
TO 25 KT. SEAS LESS THAN 8 FT. 
.12 HOUR FORECAST FROM 11N TO 13N BETWEEN 72W AND 76W... 
INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT. 
SEAS LESS THAN 8 FT.
.24 HOURS 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 GR. NATIONAL HURRICANE CENTER.