821 
FZNT02 KNHC 231618
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC SAT NOV 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC SAT NOV 23.
24 HOUR FORECAST VALID 1200 UTC SUN NOV 24.
48 HOUR FORECAST VALID 1200 UTC MON NOV 25.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM SEBASTIEN NEAR 30.4N 47.7W 997 MB AT 1500 UTC 
NOV 23 MOVING NE OR 055 DEG AT 23 KT. MAXIMUM SUSTAINED WINDS 55 
KT GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM E 
SEMICIRCLE AND 80 NM W SEMICIRCLE.  SEAS 12 FT OR GREATER WITHIN 
120 NM E SEMICIRCLE...150 NM SW QUADRANT AND 180 NM NW QUADRANT 
WITH SEAS TO 22 FT. ELSEWHERE FROM 25N TO 31N BETWEEN 47W AND 
52W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER AREA N OF 23N 
BETWEEN 45W AND 64W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN 
MIXED N AND NE SWELL.
.24 HOUR FORECAST TROPICAL STORM SEBASTIEN NEAR 34.4N 40.0W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE 
WINDS WITHIN 80 NM N SEMICIRCLE...140 NM SE QUADRANT AND 100 NM 
SW QUADRANT. SEAS 12 FT OR GREATER N OF 30N BETWEEN 41W AND 45W 
WITH SEAS TO 14 FT. ELSEWHERE OVER FORECAST WATERS N OF 29N 
BETWEEN 39W AND 43W SW WINDS 20 TO 25 KT. SEAS 9 TO 14 FT. 
REMAINDER AREA N OF 27N BETWEEN 38W AND 51W WINDS 20 KT OR LESS. 
SEAS 8 TO 10 FT IN N SWELL. 
.48 HOUR FORECAST POST-TROPICAL SEBASTIEN NEAR 39.3N 26.7W. 
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE 
WINDS WITHIN 170 NM S SEMICIRCLE...80 NM NE QUADRANT AND 130 NM 
NW QUADRANT. SEAS 12 FT OR GREATER N OF AREA. OVER FORECAST 
WATERS N OF 30N E OF 38W WINDS 20 KT OR LESS. SEAS TO 8 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 S OF 17N E OF 42W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN 
MIXED N AND SE SWELL.
.24 HOUR FORECAST S OF 10N E OF 44W WINDS 20 KT OR LESS. SEAS 
TO 8 FT IN MIXED N AND SE SWELL.
.30 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.ATLC 15 HOUR FORECAST COLD FRONT APPROACHING FROM W OF AREA.
N OF 30N W OF 76W SW WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.18 HOUR FORECAST COLD FRONT APPROACHING FROM W OF AREA.
N OF 28.5N W OF 74W SW WINDS 20 TO 30 KT. SEAS TO 8 FT.
.24 HOUR FORECAST COLD FRONT FROM 30N78W TO 28N80W. N OF 27.5N E 
OF THE FRONT TO 69W SW WINDS 20 TO 30 KT. SEAS 8 TO 11 FT. 
ELSEWHERE W OF THE FRONT SW TO W WINDS 20 TO 25 KT. SEAS 8 TO 11 
FT.  
.48 HOUR FORECAST COLD FRONT FROM 31N66W TO 26N76W. N OF 28.5N 
BETWEEN 62W AND 70W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN 
MIXED NE AND NW SWELL.

.ATLC 21 HOUR FORECAST COLD FRONT N OF THE AREA. N OF 30N 
BETWEEN 59W AND 63W WINDS 20 KT OR LESS. SEAS TO 8 FT IN MIXED 
NE AND NW SWELL.
.24 HOUR FORECAST LITTLE CHANGE.
.42 HOUR FORECAST COLD FRONT N OF THE AREA. WINDS 20 KT OR LESS. 
SEAS LESS THAN 8 FT. 

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

$$
.FORECASTER NR. NATIONAL HURRICANE CENTER.