448 
FZNT02 KNHC 100957
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL 
1030 UTC MON SEP 10 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC MON SEP 10.
24 HOUR FORECAST VALID 0600 UTC TUE SEP 11.
48 HOUR FORECAST VALID 0600 UTC WED SEP 12.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE FLORENCE NEAR 24.9N 58.9W 969 MB AT 0900 UTC SEP 10 
MOVING WNW OR 285 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 90 KT 
GUSTS 110 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM NW AND SE 
QUADRANTS...110 NM NE QUADRANT AND 50 NM SW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 180 NM N SEMICIRCLE...90 NM SE QUADRANT AND 
120 NM SW QUADRANT WITH SEAS TO 28 FT. ELSEWHERE WITHIN 210 NM N 
AND 120 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 10 TO 17 FT. 
REMAINDER OF AREA N OF 22N BETWEEN 53W AND 65W WINDS 20 KT OR 
LESS. SEAS TO 11 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE FLORENCE NEAR 26.1N 63.1W. MAXIMUM 
SUSTAINED WINDS 120 KT GUSTS 145 KT. TROPICAL STORM FORCE WINDS 
WITHIN 110 NM NW AND SE QUADRANTS...130 NM NE QUADRANT AND 60 NM 
SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 210 NM N AND 150 NM S 
SEMICIRCLES WITH SEAS TO 35 FT. ELSEWHERE WITHIN 240 NM NW AND 
150 NM SE SEMICIRCLES WINDS 20 TO 33 KT. SEAS 11 TO 19 FT. 
REMAINDER OF AREA N OF 22N BETWEEN 57W AND 68W WINDS 20 KT OR 
LESS. SEAS TO 11 FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE FLORENCE NEAR 28.8N 69.3W. MAXIMUM 
SUSTAINED WINDS 130 KT GUSTS 160 KT. TROPICAL STORM FORCE WINDS 
WITHIN 150 NM NE QUADRANT...130 NM SE QUADRANT...80 NM SW 
QUADRANT...AND 120 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
270 NM N AND 240 NM S SEMICIRCLES WITH SEAS TO 40 FT. ELSEWHERE 
WITHIN 240 NM N AND 150 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 
12 TO 24 FT. REMAINDER OF AREA N OF 22N BETWEEN 63W AND 77W 
WINDS 20 KT OR LESS. SEAS TO 11 FT IN MIXED SWELL E OF BAHAMAS.
.72 HOUR FORECAST HURRICANE FLORENCE NEAR 32.2N 74.8W. MAXIMUM 
SUSTAINED WINDS 125 KT GUSTS 150 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE FLORENCE NEAR 32.2N 74.8W. MAXIMUM 
SUSTAINED WINDS 100 KT GUSTS 120 KT.
.120 HOUR FORECAST TROPICAL STORM FLORENCE INLAND NEAR 35.8N 
79.6W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT.

...HURRICANE WARNING...
.HURRICANE ISAAC NEAR 14.7N 42.7W 993 MB AT 0900 UTC SEP 10 
MOVING W OR 280 DEG AT 12 KT. MAXIMUM SUSTAINED WINDS 65 KT 
GUSTS 80 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM N 
SEMICIRCLE AND 20 NM S SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 
60 NM OF CENTER WITH SEAS TO 23 FT. ELSEWHERE WITHIN 330 NM NE 
AND 120 NM SW SEMICIRCLES WINDS 20 TO 33 KT. SEAS 9 TO 15 FT. 
REMAINDER OF AREA FROM 11N TO 23N BETWEEN 37W AND 46W WINDS 20 
KT OR LESS. SEAS TO 11 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE ISAAC NEAR 15.0N 47.4W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS 
WITHIN 50 NM N SEMICIRCLE AND 30 NM S SEMICIRCLE. SEAS 12 FT OR 
GREATER WITHIN 210 NM N AND 120 NM S SEMICIRCLES WITH SEAS TO 28 
FT. ELSEWHERE WITHIN 270 NM N AND 150 NM S SEMICIRCLES WINDS 20 
TO 33 KT. SEAS 10 TO 18 FT. REMAINDER OF AREA FROM 11N TO 23N 
BETWEEN 42W AND 52W WINDS 20 KT OR LESS. SEAS TO 11 FT IN MIXED 
SWELL.
.48 HOUR FORECAST HURRICANE ISAAC NEAR 15.0N 53.0W. MAXIMUM 
SUSTAINED WINDS 80 KT GUSTS 100 KT. TROPICAL STORM FORCE WINDS 
WITHIN 40 NM S SEMICIRCLE...80 NM NE QUADRANT AND 70 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 270 NM N AND 180 NM S 
SEMICIRCLES OF CENTER WITH SEAS TO 34 FT. ELSEWHERE WITHIN 240 
NM N AND 150 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 11 TO 20 
FT. REMAINDER OF AREA FROM 10N TO 23N BETWEEN 47W AND 59W WINDS 
20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.72 HOUR FORECAST HURRICANE ISAAC NEAR 15.3N 58.0W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM ISAAC NEAR 15.3N 58.0W. MAXIMUM 
SUSTAINED WINDS 60 KT GUSTS 75 KT.
.120 HOUR FORECAST TROPICAL STORM ISAAC NEAR 15.6N 69.2W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.

...HURRICANE WARNING...
.HURRICANE HELENE E OF AREA NEAR 14.3N 28.9W. MAXIMUM SUSTAINED 
WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS AND 12 FT 
SEAS E OF AREA. FROM 18N TO 23N E OF 37W NE WINDS 20 TO 25 KT. 
SEAS 9 TO 10 FT. ELSEWHERE FROM 17N TO 24N E OF 37W WINDS 20 KT 
OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE HELENE E OF AREA NEAR 15.5N 33.4W. 
MAXIMUM SUSTAINED WINDS 85 KT GUSTS 105 KT. TROPICAL STORM FORCE 
WINDS E OF AREA. OVER FORECAST WATERS E OF LINE FROM 12N37W TO 
20N40W TO 22N38W WINDS 20 TO 30 KT. SEAS 10 TO 19 FT. REMAINDER 
OF AREA FROM 10N TO 24N E OF 41W WINDS 20 KT OR LESS. SEAS TO 11 
FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE HELENE NEAR 17.2N 37.2W. MAXIMUM 
SUSTAINED WINDS 80 KT GUSTS 100 KT. TROPICAL STORM FORCE WINDS 
WITHIN 120 NM NE QUADRANT...80 NM SE QUADRANT...70 NM SW 
QUADRANT...AND 110 NM NW QUADRANT. SEAS 12 FT OR GREATER OVER 
FORECAST WATERS WITHIN 390 NM NW AND 150 NM SE SEMICIRCLES WITH 
SEAS TO 36 FT. ELSEWHERE WITHIN 270 NM NW AND 180 NM SE 
SEMICIRCLES WINDS 20 TO 33 KT. SEAS 11 TO 20 FT. REMAINDER OF 
AREA FROM 11N TO 25N E OF 46W WINDS 20 KT OR LESS. SEAS TO 11 FT 
IN MIXED SWELL.
.72 HOUR FORECAST HURRICANE HELENE NEAR 20.3N 39.4W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM HELENE NEAR 20.3N 39.4W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT.
.120 HOUR FORECAST TROPICAL STORM HELENE NEAR 31.2N 41.1W.
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.
 
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

$$
.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.