986 FZNT02 KNHC 111554 HSFAT2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 1630 UTC TUE SEP 11 2018 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 1200 UTC TUE SEP 11. 24 HOUR FORECAST VALID 1200 UTC WED SEP 12. 48 HOUR FORECAST VALID 1200 UTC THU SEP 13. .WARNINGS. ...HURRICANE WARNING... .HURRICANE FLORENCE NEAR 26.7N 65.3W 950 MB AT 1500 UTC SEP 11 MOVING WNW OR 295 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 115 KT GUSTS 140 KT. TROPICAL STORM FORCE WINDS WITHIN 130 NM E SEMICIRCLE...80 NM SW QUADRANT AND 110 NM NW QUADRANT.SEAS 12 FT OR GREATER WITHIN 210 NM NW AND SE QUADRANTS...300 NM NE QUADRANT AND 180 NM SW QUADRANT WITH SEAS TO 43 FT. ELSEWHERE WITHIN 270 NM NE AND 150 NM SW SEMICIRCLES WINDS 20 TO 33 KT. SEAS 9 TO 20 FT. REMAINDER OF AREA N OF 21.5N BETWEEN 57W AND 69W WINDS 20 KT OR LESS. SEAS TO 10 FT IN MIXED SWELL. .24 HOUR FORECAST HURRICANE FLORENCE NEAR 29.4N 70.6W. MAXIMUM SUSTAINED WINDS 130 KT GUSTS 160 KT. TROPICAL STORM FORCE WINDS WITHIN 150 NM NE QUADRANT...140 NM SE QUADRANT...90 NM SW QUADRANT...AND 130 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 330 NM WITH SEAS TO 50 FT. ELSEWHERE WITHIN 270 NM NE AND 120 NM SW SEMICIRCLES WINDS 20 TO 33 KT. SEAS 10 TO 21 FT. REMAINDER OF AREA N OF 22N BETWEEN 61W AND 78W WINDS 20 KT OR LESS. SEAS TO 11 FT IN MIXED SWELL E OF BAHAMAS. .48 HOUR FORECAST HURRICANE FLORENCE NEAR 32.6N 75.2W. MAXIMUM SUSTAINED WINDS 120 KT GUSTS 145 KT. TROPICAL STORM FORCE WINDS WITHIN 150 NM NE QUADRANT...140 NM SE QUADRANT...100 NM SW QUADRANT...AND 120 NM NW QUADRANT. SEAS 12 FT OR GREATER OVER FORECAST WATERS WITHIN 420 NM NE AND 270 NM SW SEMICIRCLES WITH SEAS TO 48 FT. ELSEWHERE WITHIN 270 NM OF CENTER EXCEPT 180 SW QUADRANT WINDS 20 TO 33 KT. SEAS 14 TO 22 FT. REMAINDER OF AREA N OF 26N W OF 67W WINDS 20 KT OR LESS. SEAS TO 11 FT IN MIXED SWELL E OF BAHAMAS. .72 HOUR FORECAST HURRICANE FLORENCE NEAR 34.2N 77.1W. MAXIMUM SUSTAINED WINDS 105 KT GUSTS 130 KT. EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. .96 HOUR FORECAST TROPICAL STORM FLORENCE NEAR 34.2N 77.1W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. .120 HOUR FORECAST TROPICAL DEPRESSION FLORENCE INLAND NEAR 35.5N 79.5W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. ...HURRICANE WARNING... .TROPICAL STORM ISAAC NEAR 14.6N 49.7W 996 MB AT 1500 UTC SEP 11 MOVING W OR 270 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 90 NM N SEMICIRCLE AND 20 NM S SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 210 NM N SEMICIRCLE AND 60 NM S SEMICIRCLE WITH SEAS TO 22 FT. ELSEWHERE WITHIN 360 NM N AND 120 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 9 TO 15 FT. REMAINDER OF AREA FROM 12N TO 22N BETWEEN 45W AND 53W WINDS 20 KT OR LESS. SEAS TO 10 FT IN MIXED SWELL. .24 HOUR FORECAST HURRICANE ISAAC NEAR 14.7N 54.4W. MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS WITHIN 90 NM N SEMICIRCLE AND 30 NM S SEMICIRCLE. SEAS 12 FT OR GREATER 240 NM N AND 90 NM S SEMICIRCLES WITH SEAS TO 26 FT. ELSEWHERE WITHIN 300 NM NW AND 120 NM SE SEMICIRCLES WINDS 20 TO 33 KT. SEAS 9 TO 16 FT. REMAINDER OF AREA FROM 12N TO 23N BETWEEN 49W AND 60W WINDS 20 KT OR LESS. SEAS TO 10 FT IN MIXED SWELL. .48 HOUR FORECAST TROPICAL STORM ISAAC NEAR 15.1N 59.9W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM NE QUADRANT...50 NM SE QUADRANT...30 NM SW QUADRANT...AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NM N SEMICIRCLE...120 NM SE AND 30 NM SW QUADRANTS WITH SEAS TO 24 FT. ELSEWHERE WITHIN 270 NM NW AND 150 NM SE SEMICIRCLES WINDS 20 TO 33 KT. SEAS 9 TO 16 FT. REMAINDER OF AREA FROM 13N TO 24N BETWEEN 54W AND 64W WINDS 20 KT OR LESS. SEAS TO 11 FT IN MIXED SWELL. .72 HOUR FORECAST TROPICAL STORM ISAAC NEAR 15.5N 65.5W. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. .96 HOUR FORECAST TROPICAL STORM ISAAC NEAR 15.5N 65.5W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. .120 HOUR FORECAST TROPICAL STORM ISAAC NEAR 15.5N 65.5W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. ...HURRICANE WARNING... .HURRICANE HELENE E OF AREA NEAR 16.5N 34.3W 966 MB AT 1500 UTC SEP 11 MOVING NW OR 310 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 95 KT GUSTS 115 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM NE QUADRANT...100 NM SE QUADRANT...40 NM SW QUADRANT...AND 80 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 300 NM NE QUADRANT...240 NM SE QUADRANT...210 NM SW QUADRANT...AND 330 NM NW QUADRANT WITH SEAS TO 36 FT. ELSEWHERE OVER FORECAST WATERS WITHIN 420 NM N AND 180 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 11 TO 19 FT. REMAINDER OF AREA FROM 10N TO 25N E OF 42W WINDS 20 KT OR LESS. SEAS TO 11 FT IN MIXED SWELL. .24 HOUR FORECAST HURRICANE HELENE NEAR 18.9N 36.9W. MAXIMUM SUSTAINED WINDS 80 KT GUSTS 100 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM NW AND SE QUADRANTS...120 NM NE QUADRANT AND 60 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 330 NM NW AND 120 NM SE SEMICIRCLES WITH SEAS TO 38 FT. ELSEWHERE WITHIN 270 NM N AND 150 NM SE SEMICIRCLES WINDS 20 TO 33 KT. SEAS 12 TO 22 FT. REMAINDER OF AREA FROM 10N TO 25N E OF 48W WINDS 20 KT OR LESS. SEAS TO 11 FT IN MIXED SWELL. .48 HOUR FORECAST TROPICAL STORM HELENE NEAR 22.5N 38.2W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM NE QUADRANT...100 NM SE QUADRANT...70 NM SW QUADRANT...AND 80 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 300 NM W AND 180 NM E SEMICIRCLES WITH SEAS TO 32 FT. ELSEWHERE WITHIN 270 NM E AND 120 NM W SEMICIRCLES WINDS 20 TO 33 KT. SEAS 11 TO 17 FT. REMAINDER OF AREA N OF 13N E OF 54W WINDS 20 KT OR LESS. SEAS TO 11 FT IN MIXED SWELL. .72 HOUR FORECAST TROPICAL STORM HELENE NEAR 27.5N 38.0W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. .96 HOUR FORECAST TROPICAL STORM HELENE NEAR 27.5N 38.0W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. .120 HOUR FORECAST TROPICAL STORM HELENE NEAR 40.0N 30.0W. 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 AND GULF OF MEXICO FROM 18N TO 25N BETWEEN 84W AND 87W...INCLUDING THE YUCATAN CHANNEL...E TO SE WINDS 20 TO 25 KT. SEAS TO 9 FT IN THE CARIBBEAN AND TO 8 FT GULF OF MEXICO. SCATTERED MODERATE TO STRONG CONVECTION FROM 18.5N TO 25N BETWEEN 82W AND 87.5W. .24 HOUR FORECAST GULF OF MEXICO FROM 24N TO 27N BETWEEN 87W AND 89W E TO SE WINDS 20 TO 25 KT. SEAS TO 8 FT. .48 HOUR FORECAST LOW PRES NEAR 25.5N94.5W 1010 MB. WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .ATLC 24 HOUR FORECAST N OF 30N BETWEEN 42W AND 50W WINDS 20 KT OR LESS. SEAS 8 FT IN N TO NE SWELL. .48 HOUR FORECAST N OF 28N BETWEEN 35W AND 55W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED NE AND SE SWELL. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. $$ .FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.