000
FZNT02 KNHC 231450
HSFAT2

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE TAMMY NEAR 21.9N 63.9W 993 MB AT 1500 UTC OCT 23
MOVING N OR 05 DEG AT 6 KT. MAXIMUM SUSTAINED WINDS 70 KT GUSTS
85 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM NE
QUADRANT...110 NM SE QUADRANT...40 NM SW QUADRANT...AND 70 NM NW
QUADRANT.  SEAS 12 FT OR GREATER WITHIN 180 NM N SEMICIRCLE AND
120 NM S SEMICIRCLE WITH SEAS TO 23 FT. ELSEWHERE WITHIN 23N61W 
TO 24N63W TO 23N65W TO 21N65W TO 19N63W TO 20N61W TO 23N61W WINDS
20 TO 33 KT. SEAS 11 TO 12 FT. REMAINDER AREA WITHIN 28N62W TO 
26N66W TO 23N69W TO 20N68W TO 19N62W TO 21N59W TO 28N62W WINDS 20
KT OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE TAMMY NEAR 23.6N 62.4W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS 
WITHIN 100 NM NE QUADRANT...110 NM SE QUADRANT...50 NM SW 
QUADRANT...AND 80 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
150 NM E SEMICIRCLE...120 NM SW QUADRANT...AND 150 NM NW QUADRANT
WITH SEAS TO 22 FT. ELSEWHERE WITHIN 24N59W TO 28N61W TO 25N66W 
TO 21N65W TO 20N63W TO 21N59W TO 24N59W WINDS 20 TO 33 KT. SEAS 
11 TO 12 FT. REMAINDER AREA WITHIN 24N59W TO 26N61W TO 25N64W TO 
23N64W TO 21N62W TO 22N60W TO 24N59W WINDS 20 KT OR LESS. SEAS 8 
TO 12 FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE TAMMY NEAR 25.8N 59.9W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS 
WITHIN 130 NM E SEMICIRCLE...80 NM SW QUADRANT AND 140 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 150 NM E SEMICIRCLE...180 
NM SW QUADRANT...AND 240 NM NW QUADRANT WITH SEAS TO 21 FT. 
ELSEWHERE WITHIN 31N54W TO 31N64W TO 27N65W TO 24N63W TO 25N56W 
TO 31N54W WINDS 20 TO 33 KT. SEAS 11 TO 12 FT. REMAINDER AREA 
WITHIN 26N57W TO 25N65W TO 21N64W TO 22N58W TO 23N56W TO 26N57W 
WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL.
.72 HOUR FORECAST POST-TROPICAL EXTRATROPICAL TAMMY NEAR 29.1N 
58.6W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL EXTRATROPICAL TAMMY NEAR 31.2N 
60.2W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
.120 HOUR FORECAST POST-TROPICAL EXTRATROPICAL TAMMY NEAR 32.4N 
63.6W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 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 24 HOUR FORECAST WITHIN 29N63W TO 29N64W TO 28N73W TO 
27N79W TO 25N74W TO 26N67W TO 29N63W...INCLUDING ATLANTIC 
EXPOSURES... NE WINDS 20 TO 30 KT. SEAS 8 TO 9 FT.
.48 HOUR FORECAST WITHIN 31N65W TO 31N75W TO 29N80W TO 24N79W TO 
23N66W TO 31N65W...INCLUDING ATLANTIC EXPOSURES... NE WINDS 20 
TO 30 KT. SEAS 8 TO 10 FT.

.GULF OF MEXICO 36 HOUR FORECAST WITHIN 28N83W TO 27N84W TO 
25N83W TO 23N83W TO 23N81W TO 25N80W TO 28N83W...INCLUDING 
STRAITS OF FLORIDA... NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 
8 FT.
.48 HOUR FORECAST WITHIN 30N84W TO 30N86W TO 27N86W TO 23N84W TO 
23N82W TO 25N80W TO 30N84W...INCLUDING STRAITS OF FLORIDA... NE 
TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

.CARIBBEAN LOW PRES NEAR 11.5N82.5W 1006 MB. WITHIN 12N80W TO 
14N81W TO 13N83W TO 11N83W TO 11N82W TO 11N80W TO 12N80W WINDS 
20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.CARIBBEAN 36 HOUR FORECAST WITHIN 21N77W TO 21N79W TO 20N79W TO 
19N79W TO 19N78W TO 20N78W TO 21N77W...INCLUDING BETWEEN CUBA 
AND JAMAICA... NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST WITHIN 21N77W TO 21N78W TO 21N80W TO 19N81W TO 
19N80W TO 19N78W TO 21N77W...INCLUDING BETWEEN CUBA AND 
JAMAICA... NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

.CARIBBEAN 48 HOUR FORECAST WITHIN 20N74W TO 20N75W TO 19N76W TO 
18N75W TO 19N74W TO 20N74W NE WINDS 20 TO 25 KT. SEAS LESS THAN 
8 FT.

.GULF OF MEXICO 15 HOUR FORECAST WITHIN 29N95W TO 28N97W TO 
24N98W TO 24N96W TO 26N95W TO 29N95W SE WINDS 20 TO 30 KT. SEAS 
LESS THAN 8 FT.
.24 HOUR FORECAST WITHIN 29N95W TO 28N97W TO 25N97W TO 25N95W TO 
26N95W TO 29N95W SE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.30 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 AL. NATIONAL HURRICANE CENTER.