FZPN01 KWBC 210405 HSFEP1 HIGH SEAS FORECAST NWS OCEAN PREDICTION CENTER WASHINGTON DC 0430 UTC TUE APR 21 2026 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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. ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE NATIONAL WEATHER SERVICE. EMAIL US AT VOSOPS@NOAA.GOV(LOWERCASE). SECURITE PACIFIC S OF 67N AND N OF 30N E OF A LINE FROM THE BERING STRAIT TO 53N172E TO 50N180W TO 30N180W ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS SYNOPSIS VALID 0000 UTC APR 21. 24 HOUR FORECAST VALID 0000 UTC APR 22. 48 HOUR FORECAST VALID 0000 UTC APR 23. .WARNINGS. ...STORM WARNING... .COMPLEX LOW WITH MAIN LOW W OF AREA 49N177E 987 MB MOVING NE 10 KT. W OF A LINE FROM 54N174W TO 47N174W...AND W AND NW OF A LINE FROM 52N175E TO 55N177E TO 57N176W WINDS 25 TO 40 KT. SEAS 3 TO 5.5 M. .24 HOUR FORECAST LOW NEAR 53N180W 972 MB. BETWEEN 120 NM AND 420 NM N AND NW QUADRANTS WINDS 35 TO 50 KT. SEAS 4 TO 7 M. ELSEWHERE N OF 42N W OF 170W...AND N OF 43N BETWEEN 158W AND 170W WINDS 25 TO 40 KT. SEAS 2.5 TO 5.5 M. .48 HOUR FORECAST LOW 55N176W 972 MB. WITHIN 360 NM SE AND BETWEEN 180 NM AND 480 NM NW QUADRANTS WINDS 35 TO 50 KT. SEAS 4.5 TO 7.5 M. ELSEWHERE W AND NW OF A LINE FROM 45N168W TO 55N160W WINDS 25 TO 40 KT. SEAS 2.5 TO 6 M. ...GALE WARNING... .24 HOUR FORECAST NEW LOW 50N128W 1010 MB. WITHIN 480 NM NW QUADRANT WINDS 20 TO 30 KT. SEAS TO 3.5 M. .30 HOUR FORECAST LOW 50N127W 1009 MB. WITHIN 360 NM NW QUADRANT WINDS 25 TO 35 KT. SEAS TO 4 M. .48 HOUR FORECAST LOW 50N126W 1008 MB. WITHIN 300 NM SW AND 420 NM NW QUADRANTS WINDS 25 TO 40 KT. SEAS 3 TO 5.5 M. ELSEWHERE FROM 45N TO 55N E OF 135W WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M. .SYNOPSIS AND FORECAST. .COMPLEX LOW WITH MAIN LOW 37N130W 1008 MB MOVING E 10 KT AND SECOND LOW 44N129W 1007 MB MOVING SW 15 KT AND TURNING SE WITHIN NEXT 24 HOURS. WITHIN 480 NM SW QUADRANT OF MAIN LOW AND 480 NM NW SEMICIRCLE OF SECOND LOW WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M. .24 HOUR FORECAST COMPLEX LOW WITH MAIN LOW 39N130W 1012 MB. WITHIN 300 NM S AND SW QUADRANTS WINDS TO 25 KT. SEAS TO 3 M. .30 HOUR FORECAST LOW DISSIPATED AND ASSOCIATED CONDITIONS DIMINISHED. .DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 53N TO 59N W OF 172W...AND FROM 40N TO 50N BETWEEN 164W AND 178W. .24 HOUR FORECAST DENSE FOG FROM 47N TO 59N W OF 173W AND FROM 39N TO 46N BETWEEN 162W AND 168W. .48 HOUR FORECAST DENSE FOG N OF 52N BETWEEN 168W AND 178E. .LIGHT TO MODERATE FREEZING SPRAY N OF 58N W OF 172W. .24 HOUR FORECAST LITTLE CHANGE. .48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 59N W OF 176W. .FORECASTER ROWLAND. OCEAN PREDICTION CENTER. NATIONAL HURRICANE CENTER MIAMI FL E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE EQUATOR E OF 120W SYNOPSIS VALID 0000 UTC TUE APR 21. 24 HOUR FORECAST VALID 0000 UTC WED APR 22. 48 HOUR FORECAST VALID 0000 UTC THU APR 23. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .WITHIN 16N94W TO 16N95W TO 16N96W TO 15N96W TO 15N95W TO 15N94W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M. ELSEWHERE WITHIN 16N94W TO 14N98W TO 12N99W TO 11N96W TO 13N94W TO 16N94W WINDS 20 KT OR LESS. SEAS 2.5 M IN NE TO E SWELL. .24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M. .COLD FRONT FROM 30N125W TO 26N130W...STATIONARY TO 22N140W. WITHIN 30N126W TO 30N140W TO 24N140W TO 25N133W TO 30N126W WINDS 20 KT OR LESS. SEAS 2.5 TO 4.0 M IN NW SWELL. .24 HOUR FORECAST WEAKENING COLD FRONT FROM 30N120W TO 25N130W...DISSIPATING STATIONARY TO 22N140W. WITHIN 27N122W TO 30N121W TO 30N140W TO 19N140W TO 19N133W TO 27N122W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW TO N SWELL. .48 HOUR FORECAST COLD FRONT DISSIPATED. WITHIN 29N115W TO 30N116W TO 30N117W TO 29N117W TO 29N116W TO 29N114W TO 29N115W NW WINDS 20 TO 25 KT. SEAS 2.5 M. ELSEWHERE WITHIN 24N113W TO 30N118W TO 21N140W TO 12N140W TO 09N123W TO 14N124W TO 24N113W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW TO N SWELL. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M. CONVECTION VALID AT 0300 UTC TUE APR 21... .INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... TROUGH AXIS FROM 05N77W TO 05N103W. ITCZ FROM 05N103W TO 04N140W. SCATTERED MODERATE S OF 10N BETWEEN 114W AND 130W...FROM 02N TO 08N AND W OF 135W. $$ .FORECASTER DELGADO. NATIONAL HURRICANE CENTER.