FZPN40 PHFO 211023

HSFNP 



HIGH SEAS FORECAST

NATIONAL WEATHER SERVICE HONOLULU HI

1100 UTC SAT MAR 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.



THIS HIGH SEAS FORECAST USES 1-MINUTE AVERAGE WINDS WHICH MAY BE

HIGHER THAN 10-MINUTE AVERAGE WINDS.



SECURITE



NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W



SYNOPSIS VALID 0600 UTC MAR 21 2026.

24 HOUR FORECAST VALID 0600 UTC MAR 22 2026.

48 HOUR FORECAST VALID 0600 UTC MAR 23 2026.



.WARNINGS.



...GALE WARNING...

.COMPLEX LOW 23N163W 1008 MB NEARLY STATIONARY. SECOND LOW 

26N156W 1007 MB MOVING NE SLOWLY. WARM FRONT FROM SECOND LOW TO 

27N155W 27N154W 28N152W 29N146W. WARM FRONT MOVING NE SLOWLY. 

TROUGH FROM SECOND LOW TO 23N159W TO FIRST LOW TO 22N165W 19N171W

19N178W. SECOND TROUGH FROM SECOND LOW TO 19N159W 17N162W 14N167W

13N171W 13N176W 12N180W MOVING SE SLOWLY. WINDS 30 TO 35 KT N OF A

LINE 26N149W 27N153W 25N158W 27N163W. WINDS 20 TO 30 KT ELSEWHERE 

N OF LINE 25N148W 27N153W 24N160W 23N173W. SCATTERED MODERATE 

TSTMS WITHIN 120 NM OF WARM FRONT AND LOWS...AND WITHIN 150 NM E

OF SECOND TROUGH N OF 15N.

.24 HOUR FORECAST COMPLEX LOW 29N154W 1008 MB. WARM FRONT FROM 

LOW TO 30N153W. TROUGH FROM LOW TO 24N157W 20N159W 15N165W 11N172W.

ANOTHER TROUGH 23N160W 21N164W 20N167W. WINDS 20 TO 30 KT 

ELSEWHERE N OF LINE 30N144W 28N146W 26N154W 30N160W. 

.48 HOUR FORECAST COMPLEX LOWS MOVED N OF AREA. FRONT 30N149W 

27N150W THENCE TROUGH 23N153W 20N159W 10N172W. WINDS 20 TO 25 KT 

FROM 21N TO 24N BETWEEN 165W AND 175W.





.SYNOPSIS AND FORECAST.



.TROUGH 30N178W 27N180W NEARLY STATIONARY AND DISSIPATING. 

.24 HOUR FORECAST TROUGH DISSIPATED. 



.48 HOUR FORECAST NEW TROUGH 23N148W 15N153W 09N161W.



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



.SEAS 4 TO 5 M N OF LINE 30N148W 24N160W 23N174W. SEAS 2.5 TO 4 M

ELSEWHERE N OF A LINE 30N143W 23N151W 19N159W 14N180W. 

.24 HOUR FORECAST SEAS 4 TO 5 M N OF LINE 30N149W 23N160W 25N170W.

SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 30N144W 20N156W 12N165W

09N180W. 

.48 HOUR FORECAST SEAS 2.5 TO 3 M N OF LINE 30N143W 27N153W 

17N163W 16N176W.



.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.



.ITCZ 04N140W 05N150W 05N160W 06N164W 04N174W 04N180W. ISOLATED 

MODERATE TSTMS WITHIN 180 NM PRIMARILY N OF ITCZ W OF 155W. 





$$



.FORECASTER TSAMOUS. HONOLULU HI.