357 FZNT02 KNHC 182000 HSFAT2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 2230 UTC TUE SEP 18 2018 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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. SECURITE ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND GULF OF MEXICO SYNOPSIS VALID 1800 UTC TUE SEP 18. 24 HOUR FORECAST VALID 1800 UTC WED SEP 19. 48 HOUR FORECAST VALID 1800 UTC THU SEP 20. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .ATLC FROM 12N TO 16N BETWEEN 44W AND 52W WINDS 20 KT OR LESS. SEAS 8 FT IN NE TO E SWELL. .24 HOUR FORECAST FROM 12N TO 17N BETWEEN 52W AND 59W NE TO E WINDS 20 TO 25 KT. SEAS 8 FT. .48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .ATLC 48 HOUR FORECAST N OF 29N BETWEEN 65W AND 70W SW WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .CARIBBEAN 06 HOUR FORECAST S OF 14N BETWEEN 70W AND 75W NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT. .24 HOUR FORECAST FROM 11N TO 16N BETWEEN 70W AND 80W NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. .48 HOUR FORECAST FROM 12N TO 16N BETWEEN 76W AND 81W WINDS 20 KT OR LESS. SEAS 8 FT IN NE TO E SWELL. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. $$ .FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.