000 FZNT02 KNHC 182119 HSFAT2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 2230 UTC THU SEP 18 2014 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 SEP 18. 24 HOUR FORECAST VALID 1800 UTC FRI SEP 19. 48 HOUR FORECAST VALID 1800 UTC SAT SEP 20. .SYNOPSIS AND FORECAST. .ATLC TROUGH FROM 31N72W TO 26N80W. N OF 28N E OF TROUGH TO 68W S TO SW WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .06 HOUR FORECAST TROUGH FROM 31N70W TO 27N80W. WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .ATLC 48 HOUR FORECAST LOW PRES NEAR 30N78W 1009 MB. OVER FORECAST WATERS WITHIN 60 NM N QUADRANT WINDS 20 TO 25 KT. SEAS TO 8 FT. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. $$ .FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.