200 
FZNT02 KNHC 272145
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC TUE SEP 27 2022

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 TUE SEP 27.
24 HOUR FORECAST VALID 1800 UTC WED SEP 28.
48 HOUR FORECAST VALID 1800 UTC THU SEP 29.

.WARNINGS.

...ATLC AND GULF OF MEXICO HURRICANE WARNING... 
.HURRICANE IAN NEAR 24.0N 83.2W 952 MB AT 2100 UTC SEP 27 MOVING
N OR 010 DEG AT 9 KT. MAXIMUM SUSTAINED WINDS 105 KT GUSTS 130 
KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM OF CENTER EXCEPT 100
NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 90 NM N 
SEMICIRCLE...60 NM SE QUADRANT AND 180 NM SW QUADRANT WITH SEAS 
TO 30 FT. ELSEWHERE WITHIN 25N80W TO 28N86W TO 28N90W TO 22N89W 
TO 19N84W TO 20N80W TO 25N80W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST HURRICANE IAN NEAR 26.6N 82.5W. MAXIMUM 
SUSTAINED WINDS 115 KT GUSTS 140 KT. TROPICAL STORM FORCE WINDS 
WITHIN 120 NM S SEMICIRCLE...160 NM NE QUADRANT AND 150 NM NW QUADRANT.
SEAS 12 FT OR GREATER WITHIN 270 NM NW...300 SW...90 NM NE AND 
120 NM SE QUADRANTS WITH SEAS TO 32 FT. ELSEWHERE OVER GULF AND
ATLC FORECAST WATERS WITHIN 28N80W TO 30N84W TO 29N93W TO 27N93W
TO 24N86W TO 24N79W TO 28N80W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT.
REMAINDER OF AREA OVER GULF WATERS AND YUCATAN CHANNEL WITHIN 
25N89W TO 28N94W TO 24N96W TO 23N94W TO 21N86W TO 23N84W TO 
25N89W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM IAN INLAND NEAR 28.5N 81.5W. 
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE 
WINDS WITHIN 120 NM S SEMICIRCLE...310 NM NE QUADRANT AND 160 NM 
NW QUADRANT. SEAS 12 FT OR GREATER OVER GULF WATERS N OF 23N AND
E OF 88W WITH SEAS TO 20 FT...AND OVER ATLC WATERS FROM 28N TO
31N W OF 78W WITH SEAS TO 18 FT. ELSEWHERE OVER ATLC WATERS
WITHIN 31N76W TO 29N83W TO 30N86W TO 29N90W TO 26N88W TO 26N80W 
TO 31N76W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. ELSEWHERE OVER GULF
WATERS WITHIN 24N82W TO 29N91W TO 26N97W TO 23N97W TO 21N92W TO
22N84W TO 24N82W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.72 HOUR FORECAST TROPICAL STORM IAN OVER WATER NEAR 31.0N 
81.1W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. EXTENDED 
OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. 
.96 HOUR FORECAST POST- TROPICAL EXTRATROPICAL IAN NEAR 34.5N 
82.0W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.
.120 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 LOW PRES NEAR 14N35W 1008 MB. WITHIN 14N35W TO 14N36W TO 
13N37W TO 12N37W TO 12N36W TO 12N35W TO 14N35W SW TO W WINDS 20 
TO 25 KT. SEAS 8 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
15N37W 1008 MB. WITHIN 18N35W TO 18N37W TO 17N38W TO 16N38W TO 
15N36W TO 16N35W TO 18N35W E WINDS 20 TO 25 KT. SEAS LESS THAN 8 
FT.
.48 HOUR FORECAST LOW PRES DISSIPATED. CONDITIONS IMPROVE. WINDS
20 KT OR LESS. SEAS LESS THAN 8 FT.

.ATLC WITHIN 31N35W TO 31N39W TO 27N36W TO 26N35W TO 31N35W
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN SE TO S SWELL.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

.GULF OF MEXICO 48 HOUR FORECAST WITHIN 20N95W TO 20N96W TO
20N97W TO 20N96W TO 19N96W TO 19N95W TO 20N95W NW WINDS 20 TO 25
KT. SEAS LESS THAN 8 FT.

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

$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.