000
FZNT02 KNHC 310409
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC THU AUG 31 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC THU AUG 31.
24 HOUR FORECAST VALID 0000 UTC FRI SEP  1.
48 HOUR FORECAST VALID 0000 UTC SAT SEP  2.

.WARNINGS.

...ATLC TROPICAL STORM WARNING...
.TROPICAL STORM IDALIA NEAR 33.0N 80.0W 987 MB AT 0300 UTC AUG 
31 MOVING NE OR 045 DEG AT 18 KT. MAXIMUM SUSTAINED WINDS 50 KT 
GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM W 
SEMICIRCLE...140 NM NE QUADRANT AND 180 NM SE QUADRANT. SEAS 12 
FT OR GREATER WITHIN 0 NM OF CENTER EXCEPT 180 NM SE QUADRANT 
WITH SEAS TO 17 FT. ELSEWHERE WITHIN 31N76W TO 31N81W TO 29N81W 
TO 28N79W TO 29N77W TO 31N76W 20 TO 30 KT. SEAS 8 TO 12 FT. 
.24 HOUR FORECAST TROPICAL STORM IDALIA NEAR 33.9N 73.8W. 
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE 
WINDS WITHIN 140 NM S SEMICIRCLE...180 NM NE QUADRANT AND 100 NM 
NW QUADRANT. SEAS 12 FT OR GREATER S OF 31N WITHIN 60 NM S 
SEMICIRCLE WITH SEAS TO 16 FT. ELSEWHERE WITHIN 31N69W TO 31N78W 
TO 30N78W TO 30N75W TO 30N72W TO 31N69W WINDS 20 TO 33 KT. SEAS 
10 TO 12 FT. REMAINDER OF AREA WITHIN 30N72W TO 30N76W TO 31N78W 
TO 30N79W TO 29N77W TO 29N73W TO 30N72W WINDS 20 KT OR LESS. SEAS
8 TO 10 FT IN MIXED SWELL. 
.48 HOUR FORECAST TROPICAL STORM IDALIA NEAR 32.3N 69.0W. 
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE 
WINDS WITHIN 170 NM NE QUADRANT...70 NM SE QUADRANT...80 NM SW 
QUADRANT...AND 140 NM NW QUADRANT. WITHIN 31N68W TO 31N77W TO 
30N75W TO 30N70W TO 31N68W WINDS 20 TO 30 KT. SEAS 12 TO 16 FT. 
REMAINDER OF AREA WITHIN 31N63W TO 30N73W TO 31N80W TO 27N77W TO 
26N70W TO 29N64W TO 31N63W WINDS 20 KT OR LESS. SEAS 8 TO 12 FT 
IN MIXED SWELL. 
.72 HOUR FORECAST TROPICAL STORM IDALIA NEAR 31.4N 67.6W. 
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. 
.96 HOUR FORECAST TROPICAL STORM IDALIA NEAR 32.0N 65.4W. 
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. 
.120 HOUR FORECAST TROPICAL STORM IDALIA NEAR 33.5N 63.0W. 
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 HURRICANE FRANKLIN WELL N OF AREA NEAR 34.6N 64.5W 965 MB 
AT 0300 UTC AUG 31 MOVING ENE OR 060 DEG AT 12 KT. MAXIMUM 
SUSTAINED WINDS 85 KT GUSTS 105 KT. TROPICAL STORM FORCE WINDS N
OF AREA. ELSEWHERE WITHIN 31N59W TO 31N70W TO 30N68W TO 29N64W 
TO 31N59W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN NW SWELL. 
.24 HOUR FORECAST HURRICANE FRANKLIN NEAR 36.5N 59.0W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS N 
OF AREA. ELSEWHERE WITHIN 31N54W TO 31N62W TO 30N61W TO 30N59W TO
30N57W TO 31N54W WINDS 20 KT OR LESS. SEAS 8 FT IN W TO NW 
SWELL. 
.36 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.ATLC TROPICAL DEPRESSION ELEVEN NEAR 28.5N 52.4W 1014 MB AT 
0300 UTC AUG 31 MOVING N OR 360 DEG AT 2 KT. MAXIMUM SUSTAINED 
WINDS 30 KT GUSTS 40 KT. WITHIN 29N51W TO 30N53W TO 28N53W TO 
27N52W TO 27N51W TO 28N51W TO 29N51W WINDS 20 TO 30 KT. SEAS 8 TO
9 FT.
.24 HOUR FORECAST TROPICAL DEPRESSION ELEVEN NEAR 31.3N 52.3W. 
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN 31N50W TO 
31N52W TO 30N52W TO 30N51W TO 30N50W TO 31N50W WINDS 20 TO 30 KT.
SEAS 8 TO 10 FT.
.36 HOUR FORECAST POST-TROPICAL REMNANT LOW ELEVEN NEAR 33.9N 
51.9W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.48 HOUR FORECAST...DISSIPATED. CONDITIONS IMPROVE. WINDS 20 KT 
OR LESS. SEAS LESS THAN 8 FT.

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

.CARIBBEAN WITHIN 15N68W TO 15N70W TO 13N75W TO 11N75W TO 12N72W
TO 11N68W TO 15N68W...INCLUDING THE GULF OF VENEZUELA...E WINDS 
20 TO 30 KT. SEAS 8 FT.
.24 HOUR FORECAST WITHIN 14N68W TO 15N73W TO 15N77W TO 13N77W TO
10N71W TO 12N67W TO 14N68W...INCLUDING THE GULF OF VENEZUELA...E
WINDS 20 TO 30 KT. SEAS 8 TO 9 FT.
.48 HOUR FORECAST WITHIN 13N69W TO 14N73W TO 11N74W TO 12N72W TO
10N72W TO 11N69W TO 13N69W...INCLUDING THE GULF OF 
VENEZUELA...NE TO E WINDS 20 TO 30 KT. SEAS 8 FT.

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

$$
.FORECASTER AREINHART. NATIONAL HURRICANE CENTER.