922 
FZNT02 KNHC 210920
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1030 UTC SAT OCT 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC SAT OCT 21.
24 HOUR FORECAST VALID 0600 UTC SUN OCT 22.
48 HOUR FORECAST VALID 0600 UTC MON OCT 23.

.WARNINGS.

...ATLC HURRICANE WARNING...
.HURRICANE TAMMY NEAR 15.2N 60.4W 991 MB AT 0900 UTC OCT 21 
MOVING NW OR 305 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 70 KT GUSTS
85 KT. TROPICAL STORM FORCE WINDS WITHIN 110 NM E 
SEMICIRCLE...30 NM SW QUADRANT AND 80 NM NW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 270 NM N SEMICIRCLE...180 NM SE QUADRANT AND 60
NM SW QUADRANT WITH SEAS TO 23 FT. ELSEWHERE...WITHIN 17N57W TO 
19N58W TO 17N62W TO 14N61W TO 14N59W TO 14N57W TO 
17N57W...INCLUDING IN ATLANTIC EXPOSURES AND PASSAGES...WINDS 20 
TO 33 KT. SEAS 10 TO 12 FT. REMAINDER OF AREA...WITHIN 27N61W TO 
26N68W TO 20N67W TO 13N61W TO 13N56W TO 20N53W TO 27N61W WINDS 20
KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE TAMMY NEAR 17.8N 62.4W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS 
WITHIN 100 NM E SEMICIRCLE...30 NM SW QUADRANT AND 70 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITH 270 NM NE QUADRANT...210 NM 
SE QUADRANT...60 NM SW QUADRANT...AND 240 NM NW QUADRANT WITH 
SEAS TO 25 FT. ELSEWHERE...WITHIN 20N59W TO 21N61W TO 20N63W TO 
18N63W TO 17N62W TO 17N59W TO 20N59W...INCLUDING IN ATLANTIC 
EXPOSURES AND PASSAGES...WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. 
REMAINDER OF AREA...WITHIN 22N57W TO 25N60W TO 24N64W TO 21N66W 
TO 17N63W TO 16N59W TO 22N57W WINDS 20 KT OR LESS. SEAS 8 TO 11 
FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE TAMMY NEAR 20.6N 64.0W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS 
WITHIN 100 NM NE QUADRANT...110 NM SE QUADRANT...30 NM SW 
QUADRANT...AND 70 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
240 NM NE QUADRANT...150 NM SE QUADRANT...60 NM SW QUADRANT...AND
210 NM NW QUADRANT WITH SEAS TO 25 FT. ELSEWHERE...WITHIN 30N60W
TO 31N66W TO 23N69W TO 20N68W TO 19N62W TO 22N59W TO 
30N60W...INCLUDING IN ATLANTIC EXPOSURES AND PASSAGES...WINDS 20 
TO 33 KT. SEAS 8 TO 12 FT.
.72 HOUR FORECAST HURRICANE TAMMY NEAR 22.8N 64.0W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE TAMMY NEAR 24.5N 63.1W. MAXIMUM
SUSTAINED WINDS 70 KT GUSTS 85 KT.
.120 HOUR FORECAST TROPICAL STORM TAMMY NEAR 27.0N 62.1W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 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 SFC TROF FROM 31N70W TO 25N75W. WITHIN 31N60W TO 31N68W TO
28N68W TO 27N67W TO 29N63W TO 31N60W S WINDS 20 TO 30 KT. SEAS 8
TO 11 FTL.
.24 HOUR FORECAST COLD FRONT FROM 31N65W TO 25N70W. WITHIN 
31N59W TO 31N75W TO 29N75W TO 27N71W TO 30N62W TO 31N59W WINDS 20
KT OR LESS. SEAS 8 TO 10 FT IN W SWELL.
.48 HOUR FORECAST COLD FRONT FROM 31N64W TO 25N69W. CONDITIONS 
MERGED WITH HURRICANE AREA DESCRIBED ABOVE.

.ATLC COLD FRONT INLAND W OF AREA. WITHIN 31N71W TO 31N79W TO 
30N79W TO 29N77W TO 31N71W SW WINDS 25 TO 30 KT. SEAS 8 TO 10 
FT. ELSEWHERE...WITHIN 31N69W TO 31N80W TO 29N80W TO 28N78W TO 
29N72W TO 31N69W SW WINDS 20 TO 30 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST CONDITIONS MERGED WITH AREA DESCRIBED ABOVE.

.ATLC 06 HOUR FORECAST WITHIN 31N35W TO 31N36W TO 30.5N35.5W TO
30N35W TO 31N35W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN N SWELL.
.24 HOUR FORECAST WITHIN 31N35W TO 31N37W TO 30N36W TO 29N35W TO
31N35W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN N SWELL.
.36 HOUR FORECAST CONDITIONS IMPROVE. 

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

$$
.FORECASTER KONARIK. NATIONAL HURRICANE CENTER.