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National Weather Service Marine Forecast FZPN01 KWBC

FZPN01 KWBC 172201
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC FRI APR 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC APR 17. 24 HOUR FORECAST VALID 1800 UTC APR 18. 48 HOUR FORECAST VALID 1800 UTC APR 19.

.WARNINGS.

STORM WARNING

.LOW 51N174E 973 MB MOVING NE 15 KT. BETWEEN 120 NM AND 360 NM E AND SE QUADRANTS WINDS 35 TO 50 KT. SEAS 4 TO 8.5 M...HIGHEST NEAR 47N177W. ELSEWHERE FROM 38N TO 54N W OF 173W WINDS 25 TO 40 KT. SEAS 3.5 TO 6 M. ALSO FROM 36N TO 56N W OF 170W WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M. .24 HOUR FORECAST LOW 55N178E 962 MB. BETWEEN 120 NM AND 360 NM N AND NW QUADRANTS WINDS 40 TO 50 KT. SEAS 5 TO 9 M. ELSEWHERE FROM 39N TO 63N W OF 163W WINDS 25 TO 40 KT. SEAS 4 TO 8 M. ALSO N OF 33N W OF 159W WINDS 20 TO 30 KT. SEAS 3 TO 6 M. .48 HOUR FORECAST LOW 57N178W 973 MB. N OF 50N W OF 154W WINDS 30 TO 45 KT. SEAS 4 TO 8 M. ELSEWHERE N OF 49N W OF 149W WINDS 20 TO 30 KT. SEAS 3 TO 6 M.

GALE WARNING

.LOW W OF AREA 37N170E 990 MB MOVING NE 30 KT. FROM 31N TO 36N W OF 171W WINDS TO 25 KT. SEAS TO 2.5 M. .12 HOUR FORECAST LOW W OF AREA 39N177E 992 MB. WITHIN 660 NM N AND NE...AND 420 NM SE QUADRANTS WINDS 30 TO 45 KT. SEAS 4 TO 7 M. .24 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY LOW 55N178E ABOVE.

GALE WARNING

.COMPLEX LOW WITH MAIN CENTER 48N143W 1005 MB MOVING NE 10 KT WILL TURN SE AFTER 24 HOURS...AND A SECONDARY CENTER 37N144W 1017 MOVING NE 30 KT...WILL SLOW AND ALSO TURN SE AFTER 24 HOURS. FROM 34N TO 52N BETWEEN 157W AND 131W WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M. .12 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 49N142W 999 MB. WITHIN 480 NM SW QUADRANT WINDS 25 TO 35 KT. SEAS 3 TO 4.5 M. .24 HOUR FORECAST COMPLEX LOW WITH ONE CENTER 50N139W 996 MB AND A SECOND CENTER 46N133W 1003 MB. WITHIN 660 NM S AND SW...AND 360 NM NW QUADRANTS OF FIRST 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...HIGHEST SW QUADRANT. ELSEWHERE FROM 33N TO 57N BETWEEN 153W AND 127W WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M. .48 HOUR FORECAST COMPLEX LOW WITH ONE CENTER 43N138W 996 MB AND A SECOND CENTER 45N131W 1003 MB. WITHIN 480 NM W SEMICIRCLE OF FIRST CENTER WINDS 25 TO 40 KT. SEAS 4 TO 7 M. ELSEWHERE FROM 32N TO 53N BETWEEN 151W AND 125W WINDS 20 TO 30 KT. SEAS 3 TO 6 M.

GALE WARNING

.48 HOUR FORECAST LOW W OF AREA 47N166E 994 MB. FROM 46N TO 50N W OF 177W WINDS 25 TO 35 KT. SEAS 4 TO 6 M. ELSEWHERE FROM 43N TO 50N W OF 168W WINDS 20 TO 30 KT. SEAS 3 TO 5 M.

HEAVY FREEZING SPRAY WARNING

.LIGHT TO MODERATE FREEZING SPRAY N OF 59N W OF 170W. .24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 60N W OF 169W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF 59N W OF 166W. .48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 60N W OF 172W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF 59N W OF 169W.

.SYNOPSIS AND FORECAST.

.FROM 30N TO 43N BETWEEN 121W AND 128W N TO NW WINDS TO 25 KT. SEAS TO 3 M. .24 HOUR FORECAST CONDITIONS DIMINISHED.

.48 HOUR FORECAST NEW LOW 32N176W 1016 MB WITH A FRONT FORECAST TO EXTEND FROM 42N167W TO LOW CENTER TO 30N177W. WITHIN 240 NM W AND SW OF FRONT WINDS TO 25 KT. SEAS TO 3.5 M.

.48 HOUR FORECAST FROM 30N TO 38N BETWEEN 166W AND 155W E TO SE WINDS 20 TO 30 KT. SEAS TO 3 M.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 58N TO 61N W OF 173W...FROM 49N TO 55N W OF 171W...N OF 55N E OF 149W...AND FROM 42N TO 49N BETWEEN 145W AND 135W.

24 HOUR FORECAST DENSE FOG FROM 55N TO 61N W OF 161W

FROM 44N TO 52N W OF 172W...N OF 58N E OF 148W...AND FROM 45N TO 58N BETWEEN 145W AND 131W. .48 HOUR FORECAST DENSE FOG N OF A LINE FROM 55N180W TO 58N155W TO 60N146W.

.FORECASTER MILLS. 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 1800 UTC FRI APR 17. 24 HOUR FORECAST VALID 1800 UTC SAT APR 18. 48 HOUR FORECAST VALID 1800 UTC SUN APR 19.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 23N109W TO 23N110W TO 23N111W TO 22N111W TO 21N110W TO 22N109W TO 23N109W NW WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M. .24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

.WITHIN 30N119W TO 30N126W TO 29N126W TO 29N122W TO 30N119W WINDS 20 KT OR LESS. SEAS 2.5 M IN N SWELL. .24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

CONVECTION VALID AT 2030 UTC FRI APR 17...

.SCATTERED MODERATE FROM 04N TO 06N BETWEEN 84W AND 87W AND WITHIN 60 NM OF 02S86.5W

INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH

TROUGH EXTENDS FROM 07N77W TO 08N86W TO LOW PRES NEAR 04N97W 1011 MB TO 07N107W AND TO 02N113W. ITCZ EXTENDS FROM 06N113W TO 07N120W TO 05N129W TO 05N140W. NUMEROUS MODERATE FROM 01N TO 04N BETWEEN 90W AND 93.5W AND WITHIN 60 NM S OF THE TROUGH BETWEEN 93.5W AND 100W. SIMILAR CONVECTION IS WITHIN 60 NM N OF THE ITCZ BETWEEN 113W AND 114W...WITHIN 30 NM S OF THE ITCZ BETWEEN 115W AND 117W AND BETWEEN 132W AND 135W. A SOUTHERN HEMISPHERIC ITCZ EXTENDS FROM 01S88W TO 02S100W TO 01S110W TO 03S120W TO 03S130W AND TO 03S140W. SCATTERED MODERATE WITHIN 30 NM OF THE ITCZ BETWEEN 96W AND 99W.

.FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.