Bulletinset for METAREA 12 Edition date (UTC): 2026-04-19 01:35:31 ============================ HIGH SEAS FORECAST ============================ FZPN02 KWBC 182325 HSFEPI HIGH SEAS FORECAST FOR METAREA XII NWS OCEAN PREDICTION CENTER WASHINGTON DC 2345 UTC SAT APR 18 2026 CCODE/1:31:12:01:00/AOW+POR/NWS/CCODE SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 1800 UTC APR 18. 24 HOUR FORECAST VALID 1800 UTC APR 19. 48 HOUR FORECAST VALID 1800 UTC APR 20. .WARNINGS. ...STORM WARNING... .LOW 56N178E 961 MB MOVING NE 10 KT. FROM 50N TO 61N W OF 174W WINDS 35 TO 50 KT. SEAS 5 TO 8 M. ELSEWHERE N OF 40N W OF 162W WINDS 25 TO 40 KT. SEAS 4 TO 7 M. ALSO N OF 38N W OF 159W WINDS 20 TO 30 KT. SEAS 3 TO 6 M. .24 HOUR FORECAST LOW 57N178W 972 MB. WITHIN 900 NM E AND NE...600 NM S AND SE...AND 480 NM N AND NW QUADRANTS WINDS 30 TO 45 KT. SEAS 5 TO 9 M. ELSEWHERE N AND W OF A LINE FROM 45N180W TO 54N147W TO 60N146W WINDS 20 TO 30 KT. SEAS 3 TO 8 M...HIGHEST NEAR 55N174W. .48 HOUR FORECAST LOW 60N168W 998 MB. WITHIN 600 NM E AND SE...AND 420 NM S AND SW QUADRANTS WINDS 25 TO 35 KT. SEAS 3 TO 6 M. ELSEWHERE N OF 52N W OF 144W WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M. ...GALE WARNING... .COMPLEX LOW WITH MAIN CENTER 49N140W 995 MB MOVING SE 15 KT AND SECOND CENTER 46N133W 1003 MB MOVING N 10 KT. WITHIN 540 NM S AND SW...AND 300 NM NW QUADRANTS OF MAIN CENTER...AND BETWEEN 180 NM AND 480 NM N AND NE QUADRANTS OF SECOND CENTER WINDS 25 TO 40 KT. SEAS 3 TO 6 M. ELSEWHERE FROM 32N TO 56N BETWEEN 153W AND 126W WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M. .24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 42N138W 996 MB. WITHIN 480 NM SW AND 420 NM NW QUADRANTS OF MAIN CENTER WINDS 30 TO 45 KT. SEAS 4 TO 8 M. ELSEWHERE FROM 31N TO 53N BETWEEN 151W AND 125W WINDS 20 TO 30 KT. SEAS 3 TO 6 M. .48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 35N134W 1005 MB. FROM 30N TO 50N BETWEEN 149W AND 125W WINDS 20 TO 30 KT. SEAS 2.5 TO 6.5 M...HIGHEST NEAR 35N136W. ...GALE WARNING... .36 HOUR FORECAST LOW W OF AREA 49N171E 991 MB. .FROM 43N TO 51N BETWEEN 180W AND 177W WINDS 25 TO 40 KT. SEAS 3 TO 5 M. .48 HOUR FORECAST LOW W OF AREA 50N175E 992 MB. BETWEEN 180 NM AND 480 NM E SEMICIRCLE WINDS 25 TO 40 KT. SEAS 4 TO 6 M. ELSEWHERE WITHIN 540 NM E SEMICIRCLE WINDS 20 TO 30 KT. SEAS 3 TO 5 M. ...HEAVY FREEZING SPRAY WARNING... .MODERATE TO HEAVY FREEZING SPRAY N OF 60N W OF 170W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF 59N W OF 167W. .24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 60N W OF 168W. .48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 59N W OF 170W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF 58N W OF 167W. .SYNOPSIS AND FORECAST. .LOW JUST W OF AREA 31N179E 1015 MB DRIFTING E. WITHIN 420 NM N AND NE QUADRANTS WINDS TO 25 KT. SEAS TO 3 M. .24 HOUR FORECAST LOW 30N179W 1018 MB. WITHIN 720 NM N AND NE QUADRANTS WINDS TO 25 KT. SEAS TO 3.5 M. .48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED. .24 HOUR FORECAST FROM 30N TO 37N BETWEEN 165W AND 155W WINDS TO 25 KT. SEAS TO 3 M. .48 HOUR FORECAST NEW LOW 33N163W 1013 MB. FROM 30N TO 38N BETWEEN 165W AND 154W WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M. .DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM N OF FROM 52N TO 62N W OF 161W...N OF 58N E OF 145W...AND FROM 44N TO 53N BETWEEN 143W AND 131W. .24 HOUR FORECAST DENSE FOG N OF 55N W OF 146W. .48 HOUR FORECAST DENSE FOG WITHIN 360 NM N AND NW OF A LINE FROM 54N180W TO 58N154W. .FORECASTER MILLS. OCEAN PREDICTION CENTER. NWS 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 1800 UTC SAT APR 18. 24 HOUR FORECAST VALID 1800 UTC SUN APR 19. 48 HOUR FORECAST VALID 1800 UTC MON APR 20. .WARNINGS. ...GALE WARNING... .30 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 16N96W TO 15N96W TO 14N95W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...NW TO N WINDS 25 TO 35 KT. SEAS 2.5 TO 3 M. .48 HOUR FORECAST WITHIN 16N94W TO 16N96W TO 13N98W TO 12N98W TO 12N97W TO 13N95W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...NE WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5 M. .SYNOPSIS AND FORECAST. .36 HOUR FORECAST COLD FRONT FROM 30N130W TO 27N140W. W OF FRONT...WITHIN 30N135W TO 30N140W TO 29N140W TO 30N136W TO 30N135W WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M IN NW TO N SWELL. .48 HOUR FORECAST COLD FRONT FROM 30N127W TO 25N135W AND WEAKENING TO 23N140W. W OF FRONT...WITHIN 30N130W TO 30N140W TO 26N140W TO 27N133W TO 30N130W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN NW TO N SWELL. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M. CONVECTION VALID AT 2130 UTC SAT APR 18... .INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... TROUGH AXIS EXTENDS FROM 06N77W TO 09N86W TO 07N96W TO 05N108W. ITCZ EXTENDS FROM 05N108W TO 06N120W TO 06N130W TO 05N140W. SCATTERED MODERATE ISOLATED STRONG WITHIN 90 NM S OF THE ITCZ BETWEEN 120W AND 122W AND WITHIN 60 NM S OF THE ITCZ BETWEEN 124W AND 126W. SCATTERED MODERATE FROM 04N TO 08N BETWEEN 85W AND 91W AND WITHIN 30 NM N OF THE ITCZ BETWEEN 139W AND 140W. A SECOND ITCZ EXTENDS 01S88W TO 01S110W TO 02S120W TO 03N130W TO 02.5SW140W. SCATTERED MODERATE FROM THE EQUATOR TO 04N BETWEEN 86W AND 91W AND WITHIN 180 NM N OF THE ITCZ BETWEEN 95W AND 101W. .FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER. NATIONAL WEATHER SERVICE HONOLULU HI NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W SYNOPSIS VALID 1800 UTC APR 18 2026. 24 HOUR FORECAST VALID 1800 UTC APR 19 2026. 48 HOUR FORECAST VALID 1800 UTC APR 20 2026. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .FRONT 30N142W 27N148W THENCE TROUGH 25N155W MOVING E 15 KT. .24 HOUR FORECAST FRONT 26N140W 25N145W THENCE TROUGH 25N140W. .48 HOUR FORECAST FRONT MOVED E OF AREA. TROUGH DISSIPATED. .TROUGH 25N167W 20N171W MOVING N 10 KT. .24 HOUR FORECAST NEW LOW 28N170W 1015 MB. TROUGH STRENGTHENS TO FRONT FROM LOW TO 30N166W AND FROM LOW TO 25N169W 22N174W. .48 HOUR FORECAST LOW MOVED N OF AREA. FRONT 30N167W 25N170W 22N175W. WINDS 20 TO 25 KT N OF 28N BETWEEN 165W AND 155W. .24 HOUR FORECAST NEW FRONT 30N178W 27N180W NEARLY STATIONARY. .48 HOUR FORECAST FRONT 30N177W 28N180W. .WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA. .24 HOUR FORECAST SEAS 2.5 TO 3 M N OF 26N W OF 177W. .48 HOUR FORECAST SEAS 2.5 TO 4 M N OF LINE 30N146W 27N140W. .SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA. .ITCZ 05N180W 06N160W 05N140W. SCATTERED MODERATE TSTMS WITHIN 240 NM N OF ITCZ. .SCATTERED MODERATE TO LOCALLY STRONG TSTMS FROM 20N TO 30N BETWEEN 165W AND 150W. ISOLATED MODERATE TSTMS FROM 17N TO 23N BETWEEN 173W AND 165W. $$ .FORECASTER PECHACEK. HONOLULU HI.=