000
FZNT02 KNHC 020951
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1030 UTC SAT SEP 2 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 SEP 2.
24 HOUR FORECAST VALID 0600 UTC SUN SEP  3.
48 HOUR FORECAST VALID 0600 UTC MON SEP  4.

.WARNINGS.

...ATLC GALE WARNING...
...ATLC TROPICAL STORM WARNING...
.POST-TROPICAL CYCLONE IDALIA NEAR 31.7N 64.6W 999 MB AT 0900 
UTC SEP 02 MOVING E OR 090 DEG AT 5 KT. MAXIMUM SUSTAINED WINDS 
50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 180 NM NE 
QUADRANT...140 NM SE QUADRANT...160 NM SW QUADRANT...AND 190 NM 
NW QUADRANT. WITHIN 31N63W TO 31N68W TO 30N67W TO 30N65W TO 
30N64W TO 31N63W W WINDS 30 TO 45 KT. SEAS 12 TO 21 FT. ELSEWHERE
WITHIN 31N62W TO 30N66W TO 31N68W TO 31N72W TO 27N67W TO 28N63W 
TO 31N62W NW WINDS 20 TO 30 KT. SEAS 10 TO 12 FT. REMAINDER OF 
AREA WITHIN 31N59W TO 29N69W TO 31N72W TO 31N80W TO 25N72W TO 
25N65W TO 31N59W...INCLUDING ATLANTIC EXPOSURES...WINDS 20 KT OR 
LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM IDALIA NEAR 32.1N 62.2W. 
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE 
WINDS WITHIN 180 NM N SEMICIRCLE...80 NM SE QUADRANT AND 120 NM 
SW QUADRANT. S OF 31 N...SEAS 12 FT OR GREATER WITHIN 280 NM SW 
QUADRANT AND 180 NM SE QUADRANT WITH SEAS TO 17 FT. ELSEWHERE 
WITHIN 31N58W TO 31N67W TO 29N66W TO 28N63W TO 28N60W TO 31N58W 
WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER OF AREA WITHIN 
29N55W TO 31N68W TO 31N78W TO 27N78W TO 22N69W TO 22N62W TO 
29N55W...INCLUDING ATLANTIC EXPOSURES...WINDS 20 KT OR LESS. SEAS
8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 35.7N 
58.6W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM 
FORCE WINDS N OF AREA. WITHIN 31N43W TO 30N77W TO 24N74W TO 
22N69W TO 28N48W TO 31N43W...INCLUDING ATLANTIC EXPOSURES...WINDS
20 KT OR LESS. SEAS 8 TO 11 FT IN N SWELL.
.72 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 40.0N 
57.8W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 41.6N 
58.6W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.120 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 43.5N
59.0W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.

...ATLC TROPICAL STORM WARNING...
.TROPICAL STORM GERT NEAR 27.7N 54.3W 1003 MB AT 0900 UTC SEP 02
MOVING NE OR 040 DEG AT 2 KT. MAXIMUM SUSTAINED WINDS 40 KT 
GUSTS 50 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM S 
SEMICIRCLE...20 NM NE QUADRANT AND 0 NM NW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 75 NM NE QUADRANT AND 60 NM SE QUADRANT WITH 
SEAS TO 12 FT. WITHIN 29N51W TO 29N52W TO 29N55W TO 27N56W TO 
26N55W TO 26N52W TO 29N51W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST TROPICAL STORM GERT NEAR 29.2N 53.1W. MAXIMUM 
SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE WINDS 
WITHIN 50 NM S SEMICIRCLE...20 NM NE QUADRANT AND 0 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 90 NM NE QUADRANT AND 75 
NM SE QUADRANT WITH SEAS TO 13 FT. ELSEWHERE WITHIN 31N51W TO 
31N53W TO 28N54W TO 27N53W TO 27N52W TO 28N50W TO 31N51W WINDS 20
TO 33 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST POST-TROPICAL GERT NEAR 33.4N 51.7W. MAXIMUM 
SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS 
WITHIN 30 NM NE QUADRANT...40 NM SE QUADRANT...20 NM SW 
QUADRANT...AND 0 NM NW QUADRANT. CONDITIONS MERGED WITH AREA 
DESCRIBED WITH IDALIA. 
.60 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 48 HOUR FORECAST POST-TROPICAL REMNANT LOW KATIA NEAR 
26.8N 34.3W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN 
31N35W TO 31N40W TO 28N39W TO 27N38W TO 26N35W TO 31N35W WINDS 
20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.

.CARIBBEAN WITHIN 14N75W TO 15N80W TO 13N80W TO 11N78W TO 11N74W
TO 12N74W TO 14N75W NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.
.18 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 AREINHART. NATIONAL HURRICANE CENTER.