680 FZNT02 KNHC 130412 HSFAT2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 0430 UTC THU SEP 13 2018 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 THU SEP 13. 24 HOUR FORECAST VALID 0000 UTC FRI SEP 14. 48 HOUR FORECAST VALID 0000 UTC SAT SEP 15. .WARNINGS. ...HURRICANE WARNING... .HURRICANE FLORENCE N OF AREA NEAR 32.0N 73.7W 957 MB AT 0300 UTC SEP 13 MOVING NW OR 315 DEG AT 15 KT. MAXIMUM SUSTAINED WINDS 95 KT GUSTS 115 KT. TROPICAL STORM FORCE WINDS WITHIN 140 NM NW AND SE QUADRANTS...170 NM NE QUADRANT AND 100 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NM S SEMICIRCLE...330 NM NE QUADRANT AND 300 NM NW QUADRANT WITH SEAS TO 50 FT. ELSEWHERE OVER FORECAST WATERS WINDS 20 TO 33 KT WITHIN 210 NM S SEMICIRCLE. REMAINDER OF AREA WITHIN 420 NM S SEMICIRCLE WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL. .24 HOUR FORECAST HURRICANE FLORENCE N OF AREA NEAR 33.9N 76.7W. MAXIMUM SUSTAINED WINDS 95 KT GUSTS 115 KT. TROPICAL STORM FORCE WINDS AND 12 FT SEAS N OF THE AREA. ELSEWHERE WITHIN 390 NM S SEMICIRCLE WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL. .48 HOUR FORECAST TROPICAL STORM FLORENCE INLAND NEAR 34.1N 78.7W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS AND 12 FT SEAS N OF THE AREA. .72 HOUR FORECAST TROPICAL STORM FLORENCE INLAND NEAR 33.5N 80.5W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. .96 HOUR FORECAST TROPICAL DEPRESSION FLORENCE NEAR 33.5N 80.5W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. .120 HOUR FORECAST POST-TROPICAL REMNANT LOW FLORENCE NEAR 37.5N 83.5W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT. ...HURRICANE WARNING... .HURRICANE HELENE NEAR 22.4N 36.9W 983 MB AT 0300 UTC SEP 13 MOVING N OR 350 DEG AT 11 KT. MAXIMUM SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM S SEMICIRCLE...150 NM NE QUADRANT AND 120 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NM E AND 270 NM W SEMICIRCLES WITH SEAS TO 35 FT. ELSEWHERE WITHIN 240 NM OF CENTER WINDS 20 TO 33 KT. REMAINDER OF AREA FROM 13N TO 28N E OF 48W WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL. .24 HOUR FORECAST TROPICAL STORM HELENE NEAR 27.3N 37.0W. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 110 NM NW AND SE QUADRANTS...140 NM NE QUADRANT AND 80 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NM OF CENTER WITH SEAS TO 32 FT. ELSEWHERE WITHIN 210 NM OF CENTER WINDS 20 TO 33 KT. REMAINDER OF AREA N OF 21N E OF 55W WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL. .48 HOUR FORECAST TROPICAL STORM HELENE N OF AREA NEAR 34.3N 35.3W. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE WINDS AND 12 FT SEAS N OF THE AREA. ELSEWHERE N OF 28N E OF 51W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. .72 HOUR FORECAST TROPICAL STORM HELENE NEAR 40.1N 30.5W. 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 40.1N 30.5W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. .120 HOUR FORECAST POST-TROPICAL EXTRATROPICAL HELENE NEAR 48.7N 12.9W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. ...TROPICAL STORM WARNING... .TROPICAL STORM ISAAC NEAR 15.3N 58.0W 1006 MB AT 0300 UTC SEP 13 MOVING W OR 270 DEG AT 17 KT. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 150 NM NE AND 120 NM NW QUADRANTS. SEAS 12 FT OR GREATER WITHIN 150 NM N AND 30 NM S SEMICIRCLES WITH SEAS TO 22 FT. ELSEWHERE WITHIN 150 NM N AND 45 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 9 TO 12 FT. REMAINDER OF AREA FROM 13N TO 23N BETWEEN 52W AND 62W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL. .24 HOUR FORECAST TROPICAL STORM ISAAC NEAR 15.6N 63.4W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM NE AND 60 NM NW QUADRANTS. SEAS 12 FT OR GREATER WITHIN 150 NM NE QUADRANT WITH SEAS TO 16 FT. ELSEWHERE WITHIN 120 NM N AND 30 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA FROM 15N TO 24N BETWEEN 56W AND 67W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL. .48 HOUR FORECAST TROPICAL STORM ISAAC NEAR 15.7N 69.2W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 70 NM NE AND 50 NM NW QUADRANTS. SEAS 12 FT OR GREATER WITHIN 60 NM NE QUADRANT WITH SEAS TO 14 FT. ELSEWHERE WITHIN 75 NM N AND 30 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. .72 HOUR FORECAST TROPICAL STORM ISAAC NEAR 15.6N 73.9W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. .96 HOUR FORECAST TROPICAL STORM ISAAC NEAR 15.6N 73.9W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. .120 HOUR FORECAST TROPICAL STORM ISAAC NEAR 17.5N 82.0W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. ...TROPICAL STORM WARNING... .SUBTROPICAL STORM JOYCE N OF THE AREA NEAR 34.1N 42.6W 1006 MB AT 0300 UTC SEP 13 MOVING SW OR 220 DEG AT 5 KT. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE WINDS AND 12 FT SEAS N OF THE AREA. N OF 28N E OF 53W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN N TO NE SWELL. .24 HOUR FORECAST TROPICAL STORM JOYCE N OF THE AREA NEAR 32.9N 43.8W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 70 NM NE...0 NM SE...50 NM SW AND 80 NM NW QUADRANTS. SEAS 12 FT OR GREATER N OF THE AREA. ELSEWHERE WITHIN 90 NM S SEMICIRCLE WINDS 20 TO 33 KT. SEAS 8 TO 10 FT. .48 HOUR FORECAST TROPICAL STORM JOYCE N OF THE AREA NEAR 32.3N 43.4W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM OF CENTER EXCEPT 70 NM NE QUADRANT. SEAS 12 FT OR GREATER N OF THE AREA. ELSEWHERE WITHIN 120 NM S SEMICIRCLE WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. .72 HOUR FORECAST TROPICAL STORM JOYCE NEAR 34.2N 40.0W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. .96 HOUR FORECAST TROPICAL STORM JOYCE NEAR 34.2N 40.0W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. .120 HOUR FORECAST...DISSIPATED. 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. .GULF OF MEXICO LOW PRES NEAR 24N92W 1009 MB. WITHIN 75 NM NE OF LOW E TO SE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 26N95W 1008 MB. WITHIN 90 N OF LOW E TO SE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...INLAND NEAR 27N98W 1009 MB. WITHIN 120 NM NE OF LOW SE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. $$ .FORECASTER MUNDELL. NATIONAL HURRICANE CENTER.