331 
FZNT02 KNHC 090404
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL 
0430 UTC SUN SEP 09 2018

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

PAN PAN

ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND
GULF OF MEXICO

SYNOPSIS VALID 0000 UTC SUN SEP 09.
24 HOUR FORECAST VALID 0000 UTC MON SEP 10.
48 HOUR FORECAST VALID 0000 UTC TUE SEP 11.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM FLORENCE NEAR 24.6N 55.2W 989 MB AT 0300 UTC SEP 
09 MOVING W OR 270 DEG AT 5 KT. MAXIMUM SUSTAINED WINDS 60 KT 
GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 110 NM N 
SEMICIRCLE...40 NM SE QUADRANT AND 30 NM SW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 150 NM NE QUADRANT...90 NM SE QUADRANT...120 
NM SW QUADRANT...AND 180 NM NW QUADRANT WITH SEAS TO 22 FT. 
ELSEWHERE WITHIN 180 NM NW AND 120 NM SE SEMICIRCLES WINDS 20 TO 
33 KT. SEAS 9 TO 15 FT. REMAINDER OF AREA FROM 21N TO 30N 
BETWEEN 52W AND 61W WINDS 20 KT OR LESS. SEAS TO 11 FT IN MIXED 
SWELL.
.12 HOUR FORECAST HURRICANE FLORENCE NEAR 24.5N 55.9W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS 
WITHIN 110 NM NE...60 NM SE...30 NM SW AND 100 NM NW QUADRANTS.
WINDS 20 TO 33 KT AND SEAS 12 FT OR GREATER WITHIN 180 NM NW AND 
90 NM SE SEMICIRCLES WITH SEAS TO 28 FT. REMAINDER OF AREA FROM 
21N TO 30N BETWEEN 53W AND 62W WINDS 20 KT OR LESS. SEAS TO 11 
FT IN MIXED SWELL. 
.24 HOUR FORECAST HURRICANE FLORENCE NEAR 24.8N 57.4W. MAXIMUM 
SUSTAINED WINDS 80 KT GUSTS 100 KT. TROPICAL STORM FORCE WINDS 
WITHIN 110 NM NE QUADRANT...60 NM SE QUADRANT...40 NM SW 
QUADRANT...AND 90 NM NW QUADRANT. WINDS 20 TO 33 KT AND SEAS 12 
FT OR GREATER WITHIN 180 NM N AND 120 NM S SEMICIRCLES WITH SEAS 
TO 34 FT. REMAINDER OF AREA N OF 22N BETWEEN 53W AND 64W WINDS 
20 KT OR LESS. SEAS TO 11 FT IN MIXED SWELL. 
.48 HOUR FORECAST HURRICANE FLORENCE NEAR 25.8N 61.8W. MAXIMUM 
SUSTAINED WINDS 110 KT GUSTS 135 KT. TROPICAL STORM FORCE WINDS 
WITHIN 120 NM NE QUADRANT...90 NM SE QUADRANT...60 NM SW 
QUADRANT...AND 100 NM NW QUADRANT. WINDS 20 TO 33 KT AND SEAS 12 
FT OR GREATER WITHIN 240 NM N AND 150 NM S SEMICIRCLES WITH SEAS 
TO 36 FT. REMAINDER OF AREA N OF 22N BETWEEN 57W AND 68W WINDS 
20 KT OR LESS. SEAS TO 11 FT IN MIXED SWELL. 
.72 HOUR FORECAST HURRICANE FLORENCE NEAR 27.5N 67.5W. MAXIMUM 
SUSTAINED WINDS 125 KT GUSTS 150 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE FLORENCE NEAR 27.5N 67.5W. MAXIMUM 
SUSTAINED WINDS 125 KT GUSTS 150 KT.
.120 HOUR FORECAST HURRICANE FLORENCE NEAR 33.8N 77.8W. MAXIMUM 
SUSTAINED WINDS 115 KT GUSTS 140 KT.

...HURRICANE WARNING...
.TROPICAL STORM ISAAC NEAR 14.4N 37.5W 1002 MB AT 0300 UTC SEP 
09 MOVING W OR 270 DEG AT 7 KT. MAXIMUM SUSTAINED WINDS 45 KT 
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM N 
SEMICIRCLE AND 0 NM S SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 
30 NM NE AND SW QUADRANTS...60 NM NW QUADRANT AND 0 NM SE 
QUADRANT WITH SEAS TO 14 FT. ELSEWHERE WITHIN 180 NM N AND 90 NM 
S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 9 TO 12 FT. REMAINDER OF 
AREA FROM 12N TO 18N E OF 39W WINDS 20 KT OR LESS. SEAS TO 11 FT 
IN MIXED SWELL. 
.24 HOUR FORECAST TROPICAL STORM ISAAC NEAR 14.5N 40.9W. MAXIMUM 
SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS 
WITHIN 50 NM N SEMICIRCLE AND 30 NM S SEMICIRCLE. SEAS 12 FT OR 
GREATER WITHIN 45 NM OF CENTER WITH SEAS TO 16 FT. ELSEWHERE 
WITHIN 320 NM NE AND 150 NM SW SEMICIRCLES WINDS 20 TO 33 KT. 
SEAS 9 TO 16 FT. REMAINDER OF AREA FROM 12N TO 24N E OF 43W SEAS 
TO 11 FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE ISAAC NEAR 14.5N 46.1W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS 
WITHIN 40 NM S SEMICIRCLE...70 NM NE QUADRANT AND 60 NM NW 
QUADRANT. WINDS 20 TO 33 KT AND SEAS 12 FT OR GREATER WITHIN 320 
NM AND 150 NM S SEMICIRCLES OF CENTER WITH SEAS TO 22 FT. 
ELSEWHERE FROM 10N TO 22N BETWEEN 40W AND 50W WINDS 20 KT OR 
LESS. SEAS TO 11 FT IN MIXED SWELL.   
.72 HOUR FORECAST HURRICANE ISAAC NEAR 14.5N 51.5W. MAXIMUM 
SUSTAINED WINDS 85 KT GUSTS 105 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE ISAAC NEAR 14.5N 51.5W. MAXIMUM 
SUSTAINED WINDS 80 KT GUSTS 100 KT.
.120 HOUR FORECAST HURRICANE ISAAC NEAR 15.0N 62.9W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 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 36 HOUR FORECAST FROM 17N TO 23N E OF 37W...IN 
ASSOCIATION WITH TROPICAL CYCLONE HELENE E OF AREA...NE WINDS 20 
TO 25 KT. SEAS 9 TO 11 FT.
.48 HOUR FORECAST E OF LINE FROM 13N35W TO 20N39W TO 22N37W...IN 
ASSOCIATION WITH TROPICAL CYCLONE HELENE E OF AREA...WINDS 20 TO 
33 KT. SEAS 10 TO 16 FT.
 
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

$$
.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.