000 FZNT02 KNHC 200240 HSFAT2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 0430 UTC FRI MAY 20 2011 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 FRI MAY 20. 24 HOUR FORECAST VALID 0000 UTC SAT MAY 21. 48 HOUR FORECAST VALID 0000 UTC SUN MAY 22. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .CARIBBEAN S OF 18N W OF 85W E TO SE WINDS 20 KT. SEAS LESS THAN 8 FT. .24 HOUR FORECAST LITTLE CHANGE. .48 HOUR FORECAST WINDS LESS THAN 20 KT. SEAS LESS THAN 8 FT. .GULF OF MEXICO N OF 20N W OF 89W SE WINDS 20 KT. SEAS TO 8 FT. .24 HOUR FORECAST W OF 89W SE WINDS 20 KT. SEAS 8 FT. .48 HOUR FORECAST W OF 90W SE WINDS 20 KT. SEAS LESS THAN 8 FT. .REMAINDER OF AREA WINDS LESS THAN 20 KT. SEAS LESS THAN 8 FT. $$ .FORECASTER MUNDELL. NATIONAL HURRICANE CENTER.