####018010331####
FZPN02 KWBC 102325

HSFEPI



HIGH SEAS FORECAST FOR METAREA XII

NWS OCEAN PREDICTION CENTER WASHINGTON DC

2345 UTC WED APR 10 2024



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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).



PLEASE SEE A PROPOSAL AND REQUEST FOR COMMENTS TO INCREASE THE

READABILITY OF THE HIGH SEAS FORECAST (WEB ADDRESS LOWERCASE).

HTTPS://OCEAN.WEATHER.GOV/PROPOSED_HIGH_SEAS_TROPICAL.PHP



SECURITE



PACIFIC N OF 30N AND S OF 67N E OF A LINE FROM BERING STRAIT 

TO 50N 160E



ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS



SYNOPSIS VALID 1800 UTC APR 10. 

24 HOUR FORECAST VALID 1800 UTC APR 11.

48 HOUR FORECAST VALID 1800 UTC APR 12.



.WARNINGS.



...STORM WARNING...

.LOW W OF AREA NEAR 57N165E 966 MB MOVING NE 25 KT. WITHIN 780 NM

SE AND 660 NM SW QUADRANTS WINDS 35 TO 50 KT. SEAS 12 TO 25 FT.

ELSEWHERE WITHIN 660 NM NE...1020 NM SE AND 840 NM SW QUADRANTS

WINDS 25 TO 35 KT. SEAS 8 TO 17 FT. ALSO WITHIN 1140 NM SE AND

1380 NM SW WINDS TO 25 KT. SEAS TO 12 FT.

.24 HOUR FORECAST LOW 60N175W 978 MB. WITHIN 360 NM SE AND 600 NM

SW QUADRANTS WINDS 35 TO 50 KT. SEAS 18 TO 34 FT. ELSEWHERE

WITHIN 1020 NM S SEMICIRCLE WINDS 25 TO 35 KT. SEAS 9 TO 18 FT.

ALSO WITHIN 1200 NM SE AND 1560 NM SW QUADRANTS WINDS TO 25 KT.

SEAS 8 TO 14 FT.

.48 HOUR FORECAST LOW 66N162W 9906MB. WITHIN 1320 NM SW QUADRANT

WINDS 20 TO 30 KT. SEAS 8 TO 18 FT.



...STORM WARNING...

.LOW S OF AREA NEAR 26N168W 1013 MB MOVING NW 10 KT. WITHIN 780

NM NW AND 960 NM NE QUADRANTS WINDS 25 TO 40 KT. SEAS 8 TO 15 FT.

ELSEWHERE WITHIN 1020 NM NW AND 1200 NM NE QUADRANTS WINDS TO 25

KT. SEAS TO 12 FT.

.24 HOUR FORECAST LOW S OF AREA 29N170W 996 MB. WITHIN 480 NM NW

AND 660 NM NE QUADRANTS WINDS 35 TO 50 KT. SEAS 12 TO 26 FT.

ELSEWHERE WITHIN 600 NM NW AND 960 NM NE QUADRANTS WINDS 25 TO 35

KT. SEAS 8 TO 16 FT. ALSO WITHIN 840 NM NW AND 1140 NM NE

QUADRANTS WINDS TO 25 KT. SEAS TO 10 FT.

.48 HOUR FORECAST LOW 31N170W 993 MB. WITHIN 720 NM N SEMICIRCLE

WINDS 25 TO 40 KT. SEAS 12 TO 25 FT. ELSEWHERE WITHIN 900 NM N

SEMICIRCLE WINDS TO 25 KT. SEAS 8 TO 14 FT.



...GALE WARNING...

.COMPLEX LOW WITH MAIN CENTER 56N148W 1008 MB MOVING SE 25 KT AND

SECOND CENTER 59N144W 1004 MB MOVING SW 10 KT. WITHIN 240 NM

NW...420 NM NE...240 NM SW AND 840 NM SW QUADRANTS WINDS 20 TO 30

KT. SEAS 8 TO 16 FT.

.24 HOUR FORECAST LOW 48N140W 1002 MB. WITHIN 300 NM NW AND 540

NM SW QUADRANTS WINDS 25 TO 40 KT. SEAS 9 TO 18 FT. ELSEWHERE

WITHIN 480 NM N AND 660 NM S SEMICIRCLES WINDS TO 25 KT. SEAS 8

TO 14 FT.

.48 HOUR FORECAST LOW 39N130W 1005 MB. WITHIN 540 NM NW AND 720

NM SW QUADRANTS WINDS 25 TO 40 KT. SEAS 11 TO 22 FT.. ELSEWHERE

WITHIN 720 NM N SEMICIRCLE AND SW QUADRANT WINDS TO 25 KT. SEAS 8

TO 16 FT.



...GALE WARNING...

.LOW 54N134W 1014 MB MOVING N 20 KT. WITHIN 480 NM SE QUADRANT

WINDS 25 TO 40 KT. SEAS 8 TO 13 FT. ELSEWHERE WITHIN 120 NM N AND

600 NM S SEMICIRCLES WINDS TO 25 KT. SEAS TO 10 FT.

.24 HOUR FORECAST LOW 58N138W 1012 MB. WITHIN 120 NM OF LOW

CENTER WINDS TO 25 KT. SEAS TO 8 FT.

.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.



.SYNOPSIS AND FORECAST.



.FROM 32N TO 46N BETWEEN 121W AND 130W WINDS TO 25 KT. SEAS TO 10

FT.

.24 HOUR FORECAST FROM 31N TO 44N BETWEEN 122W AND 132W WINDS TO

25 KT. SEAS TO 10 FT.

.48 HOUR FORECAST CONDITIONS IMPROVED.



.48 HOUR FORECAST NEW LOW 59N146W 1012 MB. WITHIN 120 NM N AND

720 NM S SEMICIRCLES  WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.



.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 52N TO 60N

BETWEEN 135W AND 148W AND FROM 49N TO 58N BETWEEN 153W AND 163W

AND N OF 56N W OF 167W AND FROM 40N TO 53N BETWEEN 176E AND

165E.

.24 HOUR FORECAST DENSE FOG FROM 45N TO 54N BETWEEN 134W AND 151W

AND FROM 55N TO 60N BETWEEN 152W AND 1175W.

.48 HOUR FORECAST DENSE FOG FROM 51N TO 61N BETWEEN 135W AND

148W.



.LIGHT TO MODERATE FREEZING SPRAY FROM 54N TO 58N BETWEEN 151W

AND 163W.

.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 57N W OF

175W.

.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 56N W OF

150W.



.FORECASTER HOLLEY. 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 WED APR 10.

24 HOUR FORECAST VALID 1800 UTC THU APR 11.

48 HOUR FORECAST VALID 1800 UTC FRI APR 12.



.WARNINGS.



...GALE WARNING...

.18 HOUR FORECAST N OF 15N BETWEEN 94.5W AND 95.5W...INCLUDING 

THE GULF OF TEHUANTEPEC...N WINDS 30 TO 35 KT. SEAS 8 TO 11 FT. 

ELSEWHERE N OF 14N BETWEEN 94W AND 96W N TO NE WINDS 20 TO 30 

KT. SEAS 8 TO 9 FT.

.24 HOUR FORECAST WITHIN 30 NM OF LINE FROM 16N95W TO 15N95W TO 

14N95.5W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 30 

TO 35 KT. SEAS 8 TO 12 FT. ELSEWHERE WITHIN 45 NM OF A LINE FROM 

16N95W TO 14NN95.5W TO 13N96W N TO NE WINDS 20 TO 30 KT. SEAS 8 

TO 10 FT. 

.30 HOUR FORECAST WITHIN 30 NM OF LINE FROM 16N95W TO 15N95W TO 

14N96.5W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 30 

TO 40 KT. SEAS 11 TO 17 FT. ELSEWHERE WITHIN 45 NM OF A LINE 

FROM 16N95W TO 14N96.5W TO 12N98W N TO NE WINDS 20 TO 30 KT. 

SEAS 8 TO 12 FT. 

.48 HOUR FORECAST WITHIN 30 NM OF LINE FROM 16N95W TO 15N95W TO 

13.5N96W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 30 

TO 40 KT. SEAS 10 TO 15 FT. ELSEWHERE WITHIN 60 NM OF A LINE 

FROM 16N95W TO 13.5N96W TO 11N100W TO 11N102W NE TO E WINDS 20 

TO 30 KT. SEAS 8 TO 13 FT.  



.SYNOPSIS AND FORECAST.



.FROM 07N TO 14N W OF 132W NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 

11 FT PRIMARILY IN NE SWELL. ELSEWHERE N OF 05N AND W OF A LINE 

FROM 20N140W TO 12N130W TO 05N122W WINDS 20 KT OR LESS. SEAS 8 

TO 9 FT IN N TO NE SWELL.

.24 HOUR FORECAST N OF 05W AND W OF A LINE FROM 19N140W TO 

11N132W TO 05N127W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN N TO 

NE SWELL.

.48 HOUR FORECAST FROM 06N TO 09N W OF 138W WINDS 20 KT OR LESS. 

SEAS 8 FT IN DECAYING MIXED NE AND NW SWELL.



.S OF 00N AND W OF 110W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN 

S SWELL.

.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.



.36 HOUR FORECAST FROM 10N TO 11.5N E OF 90W...INCLUDING THE 

GULF OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 

FT.

.48 HOUR FORECAST FROM 10N TO 12N E OF 90W...INCLUDING THE GULF 

OF PAPAGAYO...NE TO E WINDS 20 TO 30 KT. SEAS TO 8 FT.



.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.



CONVECTION VALID AT 2100 UTC WED APR 10...



.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

A TROUGH EXTENDS FROM NORTHERN COLOMBIA NEAR 10N74W TO 06N95W TO 

06N110W. THE ITCZ CONTINUES FROM 06N110W TO 05N125W AND TO 

BEYOND 04N140W. SCATTERED MODERATE TO ISOLATED STRONG CONVECTION 

IS NOTED FROM 04N TO 10N BETWEEN 81W AND 89W. SIMILAR CONVECTIVE 

ACTIVITY IS OBSERVED IN A ABOUT 45 NM WIDE BAND EXTENDING FROM 

13N100W TO 07N112W. 



.FORECASTER GR. NATIONAL HURRICANE CENTER.



NATIONAL WEATHER SERVICE HONOLULU HI



NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E



SYNOPSIS VALID 1800 UTC APR 10 2024.

24 HOUR FORECAST VALID 1800 UTC APR 11 2024.

48 HOUR FORECAST VALID 1800 UTC APR 12 2024.



.WARNINGS.



...STORM WARNING...

.LOW 26N167W 1013 MB MOVING SE 10 KT. FRONT FROM 30N161W TO 

28N165W

TO LOW TO 25N172W TO 26N178W TO 30N174E MOVING SE 20 KT. TROUGH

FROM LOW TO 22N174W MOVING SE 10 KT. NE WINDS 30 TO 40 KT N OF 27N

BETWEEN 165W AND 175. WINDS 20 TO 25 KT ELSEWHERE N OF LINE FROM

30N161W TO 24N177W TO 25N170E. SCATTERED MODERATE TO STRONG TSTMS

WITHIN 270 NM OF LOW. SEE SEAS BELOW.

.24 FORECAST LOW NEAR 28N169W 996 MB. FRONT MERGED WITH TROUGH

FROM LOW TO 30N168W. TROUGH FROM 30N166W TO 27N164W TO 16N172W.

WINDS 30 TO 50 KT WITHIN 360 NM W AND NW OF LOW...AND WITHIN 90

NM E SEMICIRCLE OF LOW. NE WINDS 20 TO 30 KT ELSEWHERE N OF LINE

FROM 24N170W TO 06N170E TO 06N160E. SE TO S WINDS 20 TO 30 KT N OF

20N BETWEEN 150W AND 167W. SEE SEAS BELOW.

.48 HOUR FORECAST LOW MOVED N OF AREA. TROUGH FROM 30N163W TO

25N162W TO 20N166W TO 13N169W. SE TO S WINDS 30 TO 40 KT N OF 25N

BETWEEN 156W AND 172W. N WINDS 30 TO 35 KT N OF 26N BETWEEN 172W 

AND

178W. WINDS 20 TO 30 KT ELSEWHERE N OF A LINE FROM 20N150W TO 

23N162W

TO 24N180W TO 20N176E TO 20N160E. SEE SEAS BELOW.



.SYNOPSIS AND FORECAST.



.NE WINDS 20 TO 25 KT FROM 06N TO 23N W OF 178E...AND FROM 07N TO 

23N

E OF 158W.

.24 HOUR FORECAST WINDS 20 TO 25 KT FROM 08N TO 20N E OF 160W.

.48 HOUR FORECAST WINDS 20 TO 25 KT FROM 04N TO 20N E OF 

160W...AND

W OF 178E BETWEEN 09N AND 20N. ADDITIONAL WINDS DESCRIBED IN STORM

WARNING ABOVE.



.OTHERWISE...WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.



.SEAS 12 TO 14 FT N OF 27N BETWEEN 167W AND 174W. 8 TO 12 FT

ELSEWHERE N OF LINE FROM 30N161W TO 25N173W 25N174E TO 30N169E. 

SEAS

8 TO 11 FT FROM 10N TO 22N W OF 176E...AND FROM 05N TO 10N BETWEEN

179E AND 172E. SEAS 8 TO 9 FT FROM 08N TO 20N E OF 150W.

.24 HOUR FORECAST SEAS 18 TO 25 FT N OF 25N BETWEEN 167W AND 175W.

SEAS 12 TO 18 FT ELSEWHERE N OF A LINE FROM 30N160W TO 23N170W TO

22N174E. SEAS 8 TO 12 FT ELSEWHERE N OF A LINE FROM 30N153W TO

24N160W TO 10N160E. SEAS 8 TO 9 FT FROM 05N TO 14N BETWEEN 152W 

AND

142W.

.48 HOUR FORECAST SEAS 18 TO 23 FT N OF 27N BETWEEN 173W AND 178E.

SEAS 12 TO 18 FT ELSEWHERE N OF A LINE FROM 30N157W TO 26N160W TO

19N175W TO 23N171E. SEAS 8 TO 12 FT ELSEWHERE N OF LINE FROM 

30N153W

TO 23N157W TO 10N173E TO 13N160E. SEAS 8 TO 9 FT FROM 05N TO 10N

BETWEEN 144W AND 157W.



.OTHERWISE...SEAS 8 FT OR LOWER OVER REMAINDER OF FORECAST AREA.



.ITCZ FROM 04N140W TO 04N161W TO 03N166W...AND FROM 04N179E TO

01N165E TO 02N160E. SCATTERED MODERATE TSTMS WITHIN 180 NM OF ITCZ

W OF 160W.





$$





.FORECASTER TSAMOUS. HONOLULU HI.