850 FZNT02 KNHC 200300 HSFAT2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 0430 UTC THU SEP 20 2018 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 0000 UTC THU SEP 20. 24 HOUR FORECAST VALID 0000 UTC FRI SEP 21. 48 HOUR FORECAST VALID 0000 UTC SAT SEP 22. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .ATLC FROM 08N TO 18N BETWEEN 52W AND 62W WINDS 20 KT OR LESS. SEAS TO 9 FT IN NE TO E SWELL. .24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .ATLC 24 HOUR FORECAST N OF 29.5N BETWEEN 63W AND 67W SW WINDS 20 TO 25 KT. SEAS TO 8 FT. .48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .CARIBBEAN FROM 11N TO 16N BETWEEN 69W AND 78W NE TO E WINDS 20 TO 25 KT. SEAS TO 10 FT. FROM 12N TO 15N BETWEEN 78W AND 81W WINDS 20 KT OR LESS. SEAS TO 8 FT IN E SWELL. .24 HOUR FORECAST FROM 11N TO 16.5N BETWEEN 65W AND 77W E WINDS 20 TO 25 KT. SEAS TO 9 FT. FROM 12.5N TO 15N BETWEEN 77W AND 83W E WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. .48 HOUR FORECAST FROM 11N TO 16.5N BETWEEN 68W AND 77W E WINDS 20 TO 25 KT. SEAS TO 10 FT. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. $$ .FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.