564 FZNT02 KNHC 181935 HSFAT2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 2230 UTC THU MAY 18 2023 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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. SECURITE ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND GULF OF MEXICO SYNOPSIS VALID 1800 UTC THU MAY 18. 24 HOUR FORECAST VALID 1800 UTC FRI MAY 19. 48 HOUR FORECAST VALID 1800 UTC SAT MAY 20. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .ATLC WITHIN 28N35W TO 28N36W TO 25N39W TO 22N35W TO 28N35W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE TO E SWELL. .24 HOUR FORECAST LITTLE CHANGE. .30 HOUR FORECAST CONDITIONS IMPROVE. .CARIBBEAN 03 HOUR FORECAST WITHIN 12N70W TO 12N73W TO 12N75W TO 11N75W TO 11N70W TO 12N70W...INCLUDING THE GULF OF VENEZUELA...NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .24 HOUR FORECAST CONDITIONS IMPROVE. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. $$ .FORECASTER KONARIK. NATIONAL HURRICANE CENTER.