FZPN40 PHFO 191026

HSFNP 



HIGH SEAS FORECAST

NATIONAL WEATHER SERVICE HONOLULU HI

1100 UTC THU MAR 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 19 2026.

24 HOUR FORECAST VALID 0600 UTC MAR 20 2026.

48 HOUR FORECAST VALID 0600 UTC MAR 21 2026.



.WARNINGS.





...GALE WARNING...

.LOW 23N168W 1007 MB MOVING E 10 KT. TROUGH FROM LOW TO 23N174W 

24N178W 26N180W MOVING ESE SLOWLY. WARM FRONT FROM LOW TO 25N168W 

26N163W 26N158W MOVING E SLOWLY. SECOND TROUGH 24N165W 23N165W 

21N166W 19N168W 16N180W MOVING E 10 KT. E WINDS 20 TO 30 KT N OF 

24N W OF 158W. ISOLATED MODERATE TSTMS FROM 16N TO 24N BETWEEN

161W AND 171W.

.24 HOUR FORECAST LOW 23N164W 1007 MB. TROUGH FROM LOW TO 22N173W 

24N179W 30N179W. WARM FRONT FROM LOW TO 25N160W 25N157W. SECOND 

TROUGH FROM 24N160W 18N163W 14N170W 13N180W. E WINDS 20 TO 30 KT N

OF A LINE 30N147W 24N156W 24N173W 30N177W.

.48 HOUR FORECAST LOW 24N164W 1007 MB. NEW SECOND LOW NEAR 26N153W

1010 MB. TROUGH FROM SECOND LOW TO 23N157W TO FIRST LOW TO 20N172W

26N179W 30N177W. WARM FRONT FROM SECOND LOW TO 28N152W 28N149W. 

SECOND TROUGH FROM 22N160W TO 17N164W 13N171W 11N180W. NE TO E 

WINDS 20 TO 35 KT N OF 27N BETWEEN 150W AND 158W. NE TO E WINDS

20 TO 30 KT ELSEWHERE N OF A LINE 30N145W 24N150W 22N173W.



.SYNOPSIS AND FORECAST.



.TROUGH 30N145W 18N155W 17N161W 14N169W MOVING NE SLOWLY. ISOLATED 

MODERATE TSTMS WITHIN 270 NM E AND SE OF TROUGH S OF 24N

.24 HOUR FORECAST TROUGH 30N146W 23N152W 21N154W.

.48 HOUR FORECAST TROUGH MERGED WITH TROUGH DESCRIBED ABOVE.



.COLD FRONT 30N151W 28N153W 27N156W MOVING ESE 15 KT. 

.24 HOUR FORECAST FRONT DISSIPATED.



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



.SEAS 2.5 TO 4 M N OF LINE 30N153W 24N158W 17N169W 11N180W. 

.24 HOUR FORECAST SEAS 4 TO 5 M N OF 24N BETWEEN 157W AND 

175W. SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 30N146W 22N155W 20N166W.

11N176W 11N180W.

.48 HOUR FORECAST SEAS 4 TO 5.5 M N OF A LINE 30N148W 23N162W

23N173W. SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 30N144W 23N151W 

11N180W.



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



.ITCZ 06N157W 06N167W 06N170W. ISOLATED MODERATE TSTMS FROM 03N TO

08N BETWEEN 162W AND 170W.





$$



.FORECASTER TSAMOUS. HONOLULU HI.