018 
FZNT02 KNHC 280858
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1030 UTC MON AUG 28 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 MON AUG 28.
24 HOUR FORECAST VALID 0600 UTC TUE AUG 29.
48 HOUR FORECAST VALID 0600 UTC WED AUG 30.

.WARNINGS.

...ATLC HURRICANE WARNING...
.HURRICANE FRANKLIN NEAR 27.2N 70.8W 956 MB AT 0900 UTC AUG 28
MOVING NNW OR 335 DEG AT 7 KT. MAXIMUM SUSTAINED WINDS 100 KT
GUSTS 120 KT. TROPICAL STORM FORCE WINDS WITHIN 130 NM NE
QUADRANT...110 NM SE QUADRANT...100 NM SW QUADRANT...AND 80 NM
NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NM NE QUADRANT 
...180 NM SE QUADRANT...135 NM SW QUADRANT...AND 210 NM NW 
QUADRANT WITH SEAS TO 33 FT. ELSEWHERE WITHIN 29N67W TO 30N69W 
TO 30N73W TO 26N74W TO 24N71W TO 26N67W TO 29N67W WINDS 20 TO 33 
KT. SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 29N65W TO 31N73W TO
30N76W TO 25N76W TO 24N68W TO 25N65W TO 29N65W WINDS 20 KT OR 
LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE FRANKLIN NEAR 29.8N 71.0W. MAXIMUM 
SUSTAINED WINDS 115 KT GUSTS 140 KT. TROPICAL STORM FORCE WINDS 
WITHIN 130 NM E SEMICIRCLE...100 NM SW QUADRANT AND 90 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 210 NM OF CENTER...EXCEPT 
150 NM SW QUADRANT WITH SEAS TO 38 FT. ELSEWHERE WITHIN 31N66W TO
31N74W TO 28N74W TO 26N73W TO 26N68W TO 31N66W WINDS 20 TO 33 
KT. SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 31N65W TO 31N80W TO
27N78W TO 25N71W TO 26N67W TO 31N65W WINDS 20 KT OR LESS. SEAS 8
TO 11 FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE FRANKLIN N OF AREA NEAR 33.2N 68.6W.
MAXIMUM SUSTAINED WINDS 95 KT GUSTS 115 KT. TROPICAL STORM FORCE
WINDS WITHIN 130 NM NE QUADRANT...140 NM SE QUADRANT...120 NM SW
QUADRANT...AND 90 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
210 NM N SEMICIRCLE AND 270 NM S SEMICIRCLE WITH SEAS TO 40 FT. 
ELSEWHERE WITHIN 31N64W TO 31N72W TO 29N69W TO 29N66W TO 31N64W 
WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 
31N63W TO 31N75W TO 28N72W TO 27N70W TO 28N66W TO 31N63W WINDS 20
KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.72 HOUR FORECAST HURRICANE FRANKLIN NEAR 37.0N 62.0W. MAXIMUM 
SUSTAINED WINDS 85 KT GUSTS 105 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE FRANKLIN NEAR 42.0N 53.0W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT.
.120 HOUR FORECAST POST-TROPICAL EXTRATROPICAL FRANKLIN NEAR 
48.0N 44.0W. MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT.

...CARIBBEAN AND GULF OF MEXICO HURRICANE WARNING...
.TROPICAL STORM IDALIA NEAR 20.1N 85.2W 989 MB AT 0900 UTC AUG
28 MOVING N OR 360 DEG AT 6 KT. MAXIMUM SUSTAINED WINDS 55 KT
GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM E
SEMICIRCLE...20 NM SW QUADRANT AND 0 NM NW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 30 NM NW AND SE QUADRANTS...60 NM NE QUADRANT 
AND 0 NM SW QUADRANT WITH SEAS TO 17 FT. ELSEWHERE WITHIN 22N83W
TO 22N86W TO 20N87W TO 19N86W TO 18N84W TO 20N83W TO 22N83W... 
INCLUDING IN YUCATAN CHANNEL...WINDS 20 TO 33 KT. SEAS 8 TO 12
FT.
.12 HOUR FORECAST HURRICANE IDALIA NEAR 21.1N 85.1W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS
WITHIN 90 NM NE QUADRANT...100 NM SE QUADRANT...40 NM SW QUADRANT
AND 20 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 105 NM E
SEMICIRCLE...15 NM SW QUADRANT AND 75 NM NW QUADRANT WITH SEAS 
TO 23 FT. ELSEWHERE WITHIN 23N83W TO 23N86W TO 22N87W TO 20N86W 
TO 19N84W TO 20N82W TO 23N83W...INCLUDING IN YUCATAN 
CHANNEL...WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST HURRICANE IDALIA NEAR 22.6N 85.1W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS 
WITHIN 110 NM NE QUADRANT...120 NM SE QUADRANT...60 NM SW 
QUADRANT...AND 50 NM NW QUADRANT. SEAS 12 FT OR GREATER OVER 
FORECAST WATERS WITHIN 120 NM N SEMICIRCLE...90 NM SE QUADRANT 
AND 45 NM SW QUADRANT WITH SEAS TO 22 FT. ELSEWHERE WITHIN 25N82W
TO 26N85W TO 24N87W TO 22N87W TO 20N84W TO 22N82W TO 
25N82W...INCLUDING STRAITS OF FLORIDA AND IN YUCATAN 
CHANNEL...WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST HURRICANE IDALIA NEAR 27.7N 84.0W. MAXIMUM 
SUSTAINED WINDS 100 KT GUSTS 120 KT. TROPICAL STORM FORCE WINDS 
WITHIN 110 NM NE QUADRANT...150 NM SE QUADRANT...90 NM SW 
QUADRANT...AND 80 NM NW QUADRANT. SEAS 12 FT OR GREATER OVER 
FORECAST WATERS WITHIN 120 NM E SEMICIRCLE...90 NM SW QUADRANT 
AND 150 NM NW QUADRANT WITH SEAS TO 32 FT. ELSEWHERE WITHIN 
30N84W TO 30N85W TO 28N86W TO 25N86W TO 25N83W TO 26N82W TO 
30N84W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA 
WITHIN 30N85W TO 28N90W TO 24N86W TO 24N83W TO 25N81W TO 27N86W 
TO 30N85W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.72 HOUR FORECAST TROPICAL STORM IDALIA OVER WATER NEAR 32.8N 
79.0W. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM IDALIA NEAR 34.5N 72.0W. 
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
.120 HOUR FORECAST TROPICAL STORM IDALIA NEAR 34.5N 67.0W. 
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 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.

.CARIBBEAN 42 HOUR FORECAST WITHIN 13N69W TO 14N72W TO 13N73W TO
12N73W TO 11N72W TO 12N69W TO 13N69W...INCLUDING THE GULF OF
VENEZUELA...NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

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

$$
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.