000
FZNT02 KNHC 211544
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC THU SEP 21.
24 HOUR FORECAST VALID 1200 UTC FRI SEP 22.
48 HOUR FORECAST VALID 1200 UTC SAT SEP 23.

.WARNINGS.

...TROPICAL STORM WARNING...
.POTENTIAL TROPICAL CYCLONE SIXTEEN NEAR 28.7N 75.9W 1012 MB AT 
1500 UTC SEP 21 MOVING N OR 010 DEG AT 8 KT. MAXIMUM SUSTAINED 
WINDS 30 KT GUSTS 40 KT. WITHIN 180 NM E SEMICIRCLE WINDS 20 TO 
30 KT. SEAS 8 TO 10 FT. 
.12 HOUR FORECAST POTENTIAL TROPICAL CYCLONE SIXTEEN NEAR 30.0N 
75.5W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.24 HOUR FORECAST POTENTIAL TROPICAL CYCLONE SIXTEEN N OF AREA 
NEAR 31.7N 75.4W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. 
TROPICAL STORM FORCE WINDS WITHIN 0 NM S SEMICIRCLE...270 NM NE 
QUADRANT AND 180 NM NW QUADRANT. OVER FORECAST WATERS WITHIN 120 
NM S SEMICIRCLE WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. ELSEWHERE N 
OF 28N W OF 77W N WINDS 20 TO 25 KT. SEAS 8 TO 11 FT PRIMARILY 
IN N SWELL. SEE PART 1.
.48 HOUR FORECAST TROPICAL STORM SIXTEEN N OF AREA NEAR 35.1N 
76.4W. 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 WATERS N 
OF 28N W OF 72W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED 
SWELL. SEE PART 1.
.72 HOUR FORECAST POST-TROPICAL SIXTEEN NEAR 38.8N 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 40.4N 71.8W.
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 N OF 30N BETWEEN 48W AND 52W WINDS 20 KT OR LESS. SEAS 
SEAS 8 FT IN NW TO N SWELL.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.FROM 18N TO 25N BETWEEN 42W AND 55W WINDS 20 KT OR LESS. SEAS 8 
TO 9 FT IN NE SWELL.
.24 HOUR FORECAST FROM 15N TO 21N E OF 37W WINDS 20 KT OR LESS. 
SEAS 8 FT IN NE TO E SWELL.
.36 HOUR FORECAST LOW PRES NEAR 15N36W 1009 MB. FROM 16N TO 19N 
BETWEEN 35W AND 38W NE TO E WINDS 20 TO 25 KT. SEAS 9 TO 10 FT. 
ELSEWHERE FROM 14N TO 21N E OF 41W WINDS 20 KT OR LESS. SEAS 8 
TO 9 FT IN NE SWELL. 
.48 HOUR FORECAST LOW PRES NEAR 15N38W 1008 MB. FROM 15N TO 20N 
BETWEEN 35W AND 41W NE TO E WINDS 20 TO 25 KT. SEAS 9 TO 11 FT. 
ELSEWHERE FROM 14N TO 23N E OF 44W WINDS 20 KT OR LESS. SEAS 8 
TO 9 FT IN NE SWELL.  

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

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.