231 FZNT02 KNHC 122138 HSFAT2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 2230 UTC WED SEP 12 2018 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 1800 UTC WED SEP 12. 24 HOUR FORECAST VALID 1800 UTC THU SEP 13. 48 HOUR FORECAST VALID 1800 UTC FRI SEP 14. .WARNINGS. ...HURRICANE WARNING... .HURRICANE FLORENCE NEAR 30.9N 72.5W 949 MB AT 2100 UTC SEP 12 MOVING NW OR 315 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 105 KT GUSTS 130 KT. TROPICAL STORM FORCE WINDS WITHIN 140 NM NW AND SE QUADRANTS...170 NM NE QUADRANT AND 100 NM SW QUADRANT.WINDS 20 TO 33 KT AND SEAS 12 FT OR GREATER WITHIN 210 NM S SEMICIRCLE...300 NM NE AND 270 NM NW QUADRANTS WITH SEAS TO 55 FT. ELSEWHERE WITHIN AREA BOUNDED BY 31N77W TO 31N62W TO 23N74W TO 27N77W TO 31N77W...INCLUDING EXPOSED BAHAMA PASSAGES...WINDS 20 KT OR LESS. SEAS 8 TO 12 FT PRIMARILY IN MIXED SWELL. NUMEROUS SQUALLS WITHIN 90 NM OF CENTER. SCATTERED TSTMS IN BANDS ELSEWHERE WITHIN 150 NM OF CENTER. .24 HOUR FORECAST HURRICANE FLORENCE NEAR 33.4N 75.9W. MAXIMUM SUSTAINED WINDS 110 KT GUSTS 135 KT. LITTLE CHANGE IN RADIUS OF TROPICAL STORM FORCE WINDS. OVER FORECAST WATERS N OF 30N BETWEEN 71W AND 80W WINDS 20 TO 33 KT AND SEAS 11 TO 15 FT. ELSEWHERE WITHIN AREA BOUNDED BY 31N81W TO 31N67W TO 27N81W TO 31N81W WINDS 20 KT OR LESS. SEAS TO 11 FT PRIMARILY IN MIXED SWELL. SCATTERED TSTMS. .48 HOUR FORECAST HURRICANE FLORENCE NEAR 34.0N 77.9W. MAXIMUM SUSTAINED WINDS 100 KT GUSTS 120 KT. TROPICAL STORM FORCE WINDS WITHIN 170 NM NE QUADRANT...140 NM SE QUADRANT...100 NM SW QUADRANT...AND 120 NM NW QUADRANT. LITTLE CHANGE IN RADIUS OF TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER. OVER FORECAST WATERS N OF 30N BETWEEN 71W AND 78W WINDS 20 KT OR LESS. SEAS TO 10 FT PRIMARILY IN MIXED SWELL. .72 HOUR FORECAST HURRICANE FLORENCE INLAND NEAR 33.6N 79.2W. MAXIMUM SUSTAINED WINDS 70 KT GUSTS 85 KT. EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. .96 HOUR FORECAST TROPICAL DEPRESSION FLORENCE NEAR 33.6N 79.2W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. .120 HOUR FORECAST TROPICAL DEPRESSION FLORENCE NEAR 33.6N 79.2W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT. ...HURRICANE WARNING... .HURRICANE HELENE NEAR 21.4N 36.7W 980 MB AT 2100 UTC SEP 12 MOVING N OR 350 DEG AT 12 KT. MAXIMUM SUSTAINED WINDS 75 KT GUSTS 90 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 270 NM W SEMICIRCLE...210 NM NE QUADRANT AND 240 NM SE QUADRANT WITH SEAS TO 36 FT. ELSEWHERE OVER FORECAST WATERS FROM 11N TO 25N BETWEEN 35W AND 48W WINDS 20 KT OR LESS. SEAS TO 11 FT PRIMARILY IN MIXED SWELL. SCATTERED TSTMS IN BANDS WITHIN 120 NM OF CENTER. .24 HOUR FORECAST TROPICAL STORM HELENE NEAR 26.0N 37.2W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. LITTLE CHANGE IN RADIUS OF TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER. ELSEWHERE FROM 15N TO 31N BETWEEN 35W AND 55W WINDS 20 KT OR LESS. SEAS TO 11 FT PRIMARILY IN MIXED SWELL. SCATTERED TSTMS IN BANDS WITHIN 150 NM OF CENTER. .48 HOUR FORECAST TROPICAL STORM HELENE NEAR 32.5N 35.5W. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 130 NM NE QUADRANT...120 NM SE QUADRANT...70 NM SW QUADRANT...AND 90 NM NW QUADRANT. WINDS 20 TO 33 KT AND SEAS 12 FT OR GREATER WITHIN 210 NM OF CENTER WITH SEAS TO 30 FT. ELSEWHERE FROM 23N TO 32N BETWEEN 35W AND 60W WINDS 20 KT OR LESS. SEAS TO 11 FT PRIMARILY IN MIXED SWELL. SCATTERED TSTMS IN BANDS WITHIN 120 NM OF CENTER. .72 HOUR FORECAST TROPICAL STORM HELENE NEAR 39.0N 32.0W. 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 39.0N 32.0W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. .120 HOUR FORECAST TROPICAL STORM HELENE NEAR 39.0N 32.0W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. ...TROPICAL STORM WARNING... .TROPICAL STORM ISAAC NEAR 15.4N 56.6W 1003 MB AT 2100 UTC SEP 12 MOVING W OR 275 DEG AT 17 KT. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 150 NM NE QUADRANT...100 NM SE QUADRANT...20 NM SW QUADRANT...AND 120 NM NW QUADRANT. WINDS 20 TO 33 KT AND SEAS 12 FT OR GREATER WITHIN 180 NM N AND 60 NM S SEMICIRCLES WITH SEAS TO 25 FT. ELSEWHERE WITHIN 510 NM N AND 210 NM S SEMICIRCLES WINDS 20 KT OR LESS. SEAS TO 10 FT PRIMARILY IN MIXED SWELL. SCATTERED TSTMS IN BANDS WITHIN 270 NM E OF CENTER. .24 HOUR FORECAST TROPICAL STORM ISAAC NEAR 15.8N 61.8W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM N SEMICIRCLE...70 NM SE QUADRANT AND 10 NM SW QUADRANT. WINDS 20 TO 33 KT AND SEAS 12 FT OR GREATER WITHIN 210 NM N AND 75 NM S SEMICIRCLES WITH SEAS TO 19 FT. ELSEWHERE FROM 13N TO 23N BETWEEN 55W AND 65W...INCLUDING CARIBBEAN PASSAGES...WINDS 20 KT OR LESS. SEAS TO 11 FT PRIMARILY IN MIXED SWELL. SCATTERED TSTMS IN BANDS WITHIN 120 NM OF CENTER. .48 HOUR FORECAST TROPICAL STORM ISAAC NEAR 16.0N 67.6W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE WINDS WITHIN 70 NM NE QUADRANT...40 NM SE QUADRANT...0 NM SW QUADRANT...AND 50 NM NW QUADRANT. WINDS 20 TO 33 KT AND SEAS 8 TO 12 FT WITHIN 120 NM OF CENTER. ATLC S OF 25N BETWEEN 60W AND 70W...INCLUDING NE CARIBBEAN PASSAGES...WINDS 20 KT OR LESS. SEAS TO 8 FT PRIMARILY IN MIXED SWELL. SCATTERED TSTMS IN BANDS WITHIN 90 NM OF CENTER. .72 HOUR FORECAST TROPICAL STORM ISAAC NEAR 16.0N 72.5W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. .96 HOUR FORECAST TROPICAL STORM ISAAC NEAR 16.0N 72.5W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. .120 HOUR FORECAST TROPICAL STORM ISAAC NEAR 16.0N 72.5W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 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. .GULF OF MEXICO LOW PRES 24N92W 1009 MB WITH TROUGH S TO 18N91W. WITHIN 75 NM E SEMICIRCLE OF LOW E TO SE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. SCATTERED TSTMS WITHIN 120 NM OF 23.5N90W. .24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 26N94W 1009 MB WITH TROUGH S TO 19N94W. WITHIN 240 NE QUADRANT OF LOW E TO SE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. SCATTERED TSTMS. .48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 27N97W 1009 MB. WITHIN 180 NM NE SEMICIRCLE E TO SE WINDS 20 TO 25 KT. SEAS TO 8 FT. SCATTERED TSTMS N OF 25N W OF 91W. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. $$ .FORECASTER ERA NATIONAL HURRICANE CENTER.