000 FZPN03 KNHC 212148 HSFEP2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 2230 UTC THU SEP 21 2017 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE EQUATOR E OF 120W SYNOPSIS VALID 1800 UTC THU SEP 21. 24 HOUR FORECAST VALID 1800 UTC FRI SEP 22. 48 HOUR FORECAST VALID 1800 UTC SAT SEP 23. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .LOW PRES NEAR 17N103.5W 1008 MB. WITHIN 120 NM OF LOW WINDS 20 KT OR LESS. SEAS TO 8 FT IN MIXED SWELL. SCATTERED SHOWERS AND THUNDERSTORMS FROM 16N TO 20N BETWEEN 101W AND 107W. .24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 16.5N102W 1008 MB. WITHIN 90 NM NE AND 120 NM SW SEMICIRCLES WINDS 20 TO 25 KT. SEAS TO 8 FT. .48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 18N105W 1006 MB. WITHIN 90 NM NE AND 120 NM SW SEMICIRCLES WINDS 20 TO 25 KT. SEAS 8 TO 11 FT. .FROM 10N TO 14N BETWEEN 100W AND 106W SW TO W WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. ELSEWHERE WITHIN 180 NM SE OF LINE FROM 16N100W TO 09N122W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN SE SWELL AND S TO SW WINDS WAVES. FROM 02N TO 08N BETWEEN 122W AND 134W WINDS 20 KT OR LESS. SEAS TO 8 FT IN SE SWELL AND S WIND WAVES. .24 HOUR FORECAST FROM 10N TO 13N BETWEEN 100W AND 111W SW WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. .48 HOUR FORECAST FROM 09N TO 12.5N BETWEEN 103W AND 117W SW TO W WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. ELSEWHERE FROM 08N TO 14N BETWEEN 97W AND 119W WINDS 20 KT OR LESS. SEAS 8 FT IN MIXED SE SWELL AND SW WIND WAVES. .POST-TROPICAL REMNANT LOW NORMA NEAR 22.5N117W 1010 MB. WITHIN 120 NM NW QUADRANT WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL. .24 HOUR FORECAST LOW TO DISSIPATE. CONDITIONS TO MERGE WITH AREA OF NW SWELL BELOW. .FROM 14N TO 17.5N BETWEEN 132W AND 140W WINDS 20 KT OR LESS. SEAS TO 8 FT IN MIXED NE AND SE SWELL. .24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .EXCEPT AS NOTED ABOVE...N OF 21N BETWEEN 117W AND 140W WINDS 20 KT OR LESS. SEAS TO 9 FT IN NW SWELL. .24 HOUR FORECAST N OF 20N BETWEEN 117W AND 129W WINDS 20 KT OR LESS. SEAS TO 8 FT IN MAINLY NW TO N SWELL. .48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .GULF OF CALIFORNIA N OF 29.5N SW WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. CONVECTION VALID AT 2115 UTC THU SEP 21... INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... MONSOON TROUGH FROM 09.5N74.5W TO 08N80W TO LOW PRES NEAR 17N103.5W 1008 MB TO LOW PRES NEAR 10N136.5W 1012 MB TO BEYOND 12N140W. SCATTERED MODERATE TO STRONG WITHIN 60 NM N AND 240 NM S OF TROUGH BETWEEN 85W AND 108W...AND BETWEEN 112W AND 140W. $$ .FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.