000
FZNT02 KNHC 191538
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC THU OCT 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 OCT 19.
24 HOUR FORECAST VALID 1200 UTC FRI OCT 20.
48 HOUR FORECAST VALID 1200 UTC SAT OCT 21.

.WARNINGS.

...ATLC HURRICANE WARNING...
.TROPICAL STORM TAMMY NEAR 13.6N 55.7W 1003 MB AT 1500 UTC OCT
19 MOVING WNW OR 285 DEG AT 13 KT. MAXIMUM SUSTAINED WINDS 50 KT
GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 110 NM NE
QUADRANT...90 NM SE QUADRANT...0 NM SW QUADRANT...AND 60 NM NW
QUADRANT.  SEAS 12 FT OR GREATER WITHIN 300 NM NE QUADRANT...120
NM SE QUADRANT...30 NM SW QUADRANT...AND 270 NM NW QUADRANT WITH
SEAS TO 18 FT. ELSEWHERE WITHIN 19N48W TO 23N52W TO 25N60W TO 21N62W TO 12N56W TO
11N51W TO 19N48W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST TROPICAL STORM TAMMY NEAR 14.8N 59.2W. MAXIMUM
SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS 
WITHIN 100 NM NE QUADRANT...90 NM SE QUADRANT...20 NM SW 
QUADRANT...AND 70 NM NW QUADRANT. SEAS 12 FT OR GREATER 
WITHIN 240 NM NE AND 90 NM SW SEMICIRCLES WITH SEAS TO 23 FT.
ELSEWHERE WITHIN 20N55W TO 20N62W TO 13N61W TO 13N55W TO
20N55W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER OF AREA WITHIN
26N58W TO 28N67W TO 21N66W TO 13N61W TO 13N52W TO 19N53W TO 
26N58W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE TAMMY NEAR 17.5N 62.1W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS 
WITHIN 100 NM E SEMICIRCLE...30 NM SW QUADRANT AND 70 NM NW 
QUADRANT. SEAS 12 FT OR GREATER 240 NM N SEMICIRCLE AND 180 NM SE
QUADRANT WITH SEAS TO 25 FT. ELSEWHERE WITHIN 21N58W TO 23N60W 
TO 22N64W TO 19N65W TO 17N63W TO 15N60W TO 21N58W WINDS 20 TO 33
KT. SEAS 10 TO 12 FT. REMAINDER OF AREA WITHIN 25N58W TO 24N67W 
TO 23N68W TO 13N58W TO 19N55W TO 25N58W WINDS 20 KT OR LESS. SEAS
8 TO 10 FT IN MIXED SWELL.
.72 HOUR FORECAST HURRICANE TAMMY NEAR 20.5N 63.3W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE TAMMY NEAR 24.0N 62.8W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT.
.120 HOUR FORECAST HURRICANE TAMMY NEAR 28.4N 57.9W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 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 36 HOUR FORECAST COLD FRONT FROM 31N77W TO 28.5N81W. 
WITHIN 31N77W TO 31N80.5W TO 30.5N80.5W TO 30N79W TO 30N78W TO 
31N77W SW TO W WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST COLD FRONT FROM 31N65W TO 26N80W. WITHIN 
31N59W TO 31N71W TO 25N68W TO 26N59W TO 31N59W S WINDS 20 TO 30 
KT. SEAS 8 TO 10 FT IN SE SWELL. ELSEWHERE WITHIN 31N70W TO 
31N80W TO 29N79W TO 28N76W TO 29N72W TO 31N70W W WINDS 20 TO 30 
KT. SEAS 8 TO 10 FT IN W TO NW SWELL.

.CARIBBEAN WITHIN 12N73W TO 13N73W TO 13N75W TO 12N76W TO 11N77W
TO 10N76W TO 12N73W E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.12 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

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

$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.