000 FZNT02 KNHC 270400 HSFAT2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 0430 UTC FRI SEP 27 2024 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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. THE NATIONAL WEATHER SERVICE IS ACCEPTING PUBLIC COMMENTS UNTIL OCTOBER 16 2024 ON A PROPOSAL TO REPLACE FEET WITH METERS WHEN DESCRIBING SEAS IN A VARIETY OF NATIONAL MARINE CENTER TEXT AND GRAPHICAL PRODUCTS FOR THE HIGH SEAS AREAS ONLY. TO LEARN MORE PLEASE VISIT (WEB ADDRESS LOWERCASE) HTTPS://OCEAN.WEATHER.GOV/PROPOSED-METERS.PHP SECURITE ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND GULF OF MEXICO SYNOPSIS VALID 0000 UTC FRI SEP 27. 24 HOUR FORECAST VALID 0000 UTC SAT SEP 28. 48 HOUR FORECAST VALID 0000 UTC SUN SEP 29. .WARNINGS. ...GULF OF MEXICO HURRICANE WARNING... .HURRICANE HELENE NEAR 29.9N 83.9W 938 MB AT 0300 UTC SEP 27 MOVING NNE OR 015 DEG AT 21 KT. MAXIMUM SUSTAINED WINDS 120 KT GUSTS 140 KT. TROPICAL STORM FORCE WINDS WITHIN 240 NM NE QUADRANT...270 NM SE QUADRANT...100 NM SW QUADRANT...AND 120 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 150 NM NE QUADRANT...340 NM SE QUADRANT...420 NM SW QUADRANT...AND 120 NM NW QUADRANT WITH SEAS TO 35 FT. ELSEWHERE WITHIN 31N76W TO 29N83W TO 31N87W TO 30N93W TO 24N84W TO 24N79W TO 31N76W... INCLUDING STRAITS OF FLORIDA AND ATLANTIC EXPOSURES...WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 28N92W TO 30N93W TO 27N96W TO 22N93W TO 20N86W TO 21N79W TO 28N92W... INCLUDING STRAITS OF FLORIDA AND IN YUCATAN CHANNEL...WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL. .12 HOUR FORECAST TROPICAL STORM HELENE INLAND NEAR 33.9N 84.0W. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 75 KT. .24 HOUR FORECAST POST-TROPICAL EXTRATROPICAL HELENE NEAR 36.9N 86.2W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 50 KT. WITHIN 31N77W TO 31N80W TO 28N80W TO 28N78W TO 31N77W WINDS 20 TO 30 KT. SEAS 8 TO 11 FT. ELSEWHERE WITHIN 30N74W TO 31N74W TO 31N77W TO 30N78W TO 28N78W TO 28N77W TO 30N74W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. .48 HOUR FORECAST POST-TROPICAL EXTRATROPICAL HELENE NEAR 36.9N 86.9W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT. OVER FORECAST WATERS CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE AND INTENSITY. ...ATLANTIC GALE WARNING... .LOW PRES NEAR 16N40W 1007 MB. WITHIN 19N38W TO 19N41W TO 16N41W TO 15N41W TO 15N39W TO 17N38W TO 19N38W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. ELSEWHERE WITHIN 20N36W TO 21N40W TO 19N41W TO 18N38W TO 16N38W TO 16N35W TO 20N36W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. .12 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE..NEAR 17N43W 1007 MB. WITHIN 18N42W TO 18N42.5W TO 17.5N43W TO 17N43W TO 17N42.5W TO 17.5N42W TO 18N42W WINDS 30 TO 35 KT. SEAS 12 TO 16 FT. ELSEWHERE WITHIN 20N38W TO 21N41W TO 19N45W TO 15N43W TO 19N37W TO 20N38W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. .24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 18N44W 1005 MB. WITHIN 19N44W TO 19N45W TO 18N45W TO 18N44W TO 19N44W WINDS 30 TO 40 KT. SEAS 12 TO 16 FT. ELSEWHERE WITHIN 20N41W TO 20N43W TO 19N45W TO 18N46W TO 17N44W TO 18N41W TO 20N41W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 21N41W TO 22N45W TO 19N47W TO 16N46W TO 19N40W TO 21N41W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL. .48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 19N48W 1005 MB. WITHIN 20N46W TO 20N48W TO 19N48W TO 18N47W TO 19N47W TO 20N46W WINDS 30 TO 40 KT. SEAS 12 TO 16 FT. ELSEWHERE WITHIN 20N46W TO 21N47W TO 20N49W TO 19N49W TO 18N48W TO 18N46W TO 20N46W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 21N43W TO 24N46W TO 23N49W TO 19N51W TO 17N48W TO 19N44W TO 21N43W WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL. .SYNOPSIS AND FORECAST. .ATLC 36 HOUR FORECAST WITHIN 21N35W TO 21N37W TO 18N37W TO 17N36W TO 16N35W TO 21N35W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NE TO E SWELL. .48 HOUR FORECAST WITHIN 22N35W TO 21N39W TO 18N40W TO 16N38W TO 15N35W TO 22N35W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NE TO E SWELL. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. $$ .FORECASTER AREINHART. NATIONAL HURRICANE CENTER.