000
FZNT02 KNHC 202157
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC WED NOV 20 2019

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 WED NOV 20.
24 HOUR FORECAST VALID 1800 UTC THU NOV 21.
48 HOUR FORECAST VALID 1800 UTC FRI NOV 22.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM SEBASTIEN NEAR 21.7N 61.5W 1002 MB AT 2100 UTC 
NOV 20 MOVING N OR 360 DEG AT 5 KT. MAXIMUM SUSTAINED WINDS 45 
KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM NE 
QUADRANT...140 NM SE QUADRANT...0 NM SW QUADRANT...AND 70 NM NW 
QUADRANT.  SEAS 12 FT OR GREATER WITHIN 240 NM NE QUADRANT...150 
NM SE QUADRANT...0 NM SW QUADRANT...AND 120 NM NW QUADRANT WITH 
SEAS TO 21 FT. ELSEWHERE FROM 19N TO 27N BETWEEN 57W AND 63W 
WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST TROPICAL STORM SEBASTIEN NEAR 24.5N 59.0W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. LITTLE CHANGE IN 
RADIUS OF TROPICAL STORM FORCE WINDS. SEAS 12 FT OR GREATER 
WITHIN 180 NM NE SEMICIRCLE WITH SEAS TO 23 FT. ELSEWHERE FROM 
22N TO 28N BETWEEN 53W AND 60W AND N OF 28N BETWEEN 50W AND 57W 
WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
.48 HOUR FORECAST POST-TROPICAL EXTRATROPICAL SEBASTIEN NEAR 
30.0N 51.4W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. GALE 
FORCE WINDS WITHIN 100 NM NE QUADRANT...140 NM SE QUADRANT...90 
NM SW QUADRANT...AND 70 NM NW QUADRANT. SEAS 12 FT OR GREATER 
WITHIN 180 NM OF LOW CENTER EXCEPT 240 NM NE QUADRANT WITH SEAS 
TO 25 FT. ELSEWHERE N OF 26N BETWEEN 45W AND 53W WINDS 20 TO 33 
KT. SEAS 8 TO 12 FT.
.72 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 EXCEPT WHERE DESCRIBED ABOVE WITH TROPICAL STORM 
SEBASTIEN...N OF 10N AND E OF 66W WINDS 20 KT OR LESS. SEAS 8 TO 
11 FT IN MIXED SWELL...HIGHEST FROM 17N TO 25N AND E OF 49W.
.24 HOUR FORECAST FROM 07N TO 28N AND E OF 51W WINDS 20 KT OR 
LESS. SEA 8 TO 10 FT...HIGHEST FROM 09N TO 20N AND E OF 45W. N 
OF 20N BETWEEN 53W AND 60W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT 
IN MIXED SWELL. 
.48 HOUR FORECAST S OF 20N AND E OF 48W WINDS 20 KT OR LESS. 
SEAS 8 TO 9 FT IN N SWELL.

.ATLC COLD FRONT FROM 31N64W TO 25N72W TO 23N80W. N OF 29.5N 
BETWEEN 68W AND 74W W TO NW WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. 
ELSEWHERE N OF 28N BETWEEN 65W AND 75W WINDS 20 KT OR LESS. SEAS 
TO 9 FT IN MIXED SWELL.
.24 HOUR FORECAST COLD FRONT FROM 31N57W TO 25N60W TO 20N65W.
FROM 23N TO 29N BETWEEN 60W AND 64W NW TO N WINDS 20 TO 25 KT. 
SEAS 9 TO 12 FT. ELSEWHERE N OF 20N BETWEEN THE FRONT AND 73W 
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST COLD FRONT FROM 31N49W TO 23N56W TO 18N60W.
N OF 20N BETWEEN THE FRONT AND 70W WINDS 20 KT OR LESS. SEAS 8 
TO 10 FT...HIGHEST NEAR 30N60W.

.ATLC AND CARIBBEAN 12 HOUR FORECAST FROM 17N TO 20N BETWEEN 73W 
AND 75W N TO NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. 
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST FROM 16N TO 19N BETWEEN 74W AND 77W N TO NE 
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST WITHIN 16N69W TO 16N73W TO 18N71W TO 18N67W TO
16N69W NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

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

$$
.FORECASTER ERA. NATIONAL HURRICANE CENTER.