FZPN40 PHFO 201506

HSFNP 



HIGH SEAS FORECAST

NATIONAL WEATHER SERVICE HONOLULU HI

1700 UTC FRI MAR 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC MAR 20 2026.

24 HOUR FORECAST VALID 1200 UTC MAR 21 2026.

48 HOUR FORECAST VALID 1200 UTC MAR 22 2026.



.WARNINGS.



...GALE WARNING...

.COMPLEX LOW 23N163W 1007 MB NEARLY STATIONARY. WARM FRONT FROM 

LOW TO 25N162W 26N160W 26N160W 27N152W MOVING E SLOWLY. TROUGH FROM

LOW TO 22N168W 21N175W 22N178W 24N179W 27N179W MOVING E SLOWLY. 

SECOND TROUGH FROM LOW TO 22N161W 21N160W 20N161W 14N169W 13N172W 

13N180W. MOVING SE SLOWLY. ENE WINDS 30 TO 35 KT N OF WARM FRONT 

AND LOW BETWEEN 156W AND 166W. ENE WINDS 20 TO 30 KT ELSEWHERE N 

OF LINE 26N151W 25N158W 24N166W 24N173W. SCATTERED MODERATE TSTMS 

WITHIN 180 NM OF WARM FRONT BETWEEN 157W AND 162W. ISOLATED MODERATE

TSTMS FROM 16N TO 24N BETWEEN AND 163W...AND WITHIN 90 NM OF SECOND 

TROUGH.

.24 HOUR FORECAST COMPLEX LOW 25N163W 1007 MB. NEW SECOND LOW 

27N155W 1008 MB. WARM FRONT FROM SECOND LOW TO 28N150W. TROUGH FROM

SECOND LOW TO 25N158W TO FIRST LOW TO 20N170W 21N174W. SECOND 

TROUGH 24N157W 22N159W 18N162W 15N166W 11N174W 10N180W. 

WINDS 30 TO 40 KT N OF A LINE 27N150W 27N156W 26N163W. WINDS 20 TO 

30 KT ELSEWHERE N OF LINE 26N148W 27N156W 25N163W 25N169W. 

.48 HOUR FORECAST COMPLEX LOW 27N160W 1006 MB. SECOND LOW MOVED N

OF AREA. FRONT 30N153W 27N156W TO FIRST LOW. TROUGH FROM LOW TO 

25N157W 18N162W 13N169W. WINDS 20 TO 30 KT N OF A LINE 30N145W 

23N153W 23N167W. 





.SYNOPSIS AND FORECAST.



.TROUGH 30N145W 28N148W 24N154W 23N159W MOVING NW 10 KT. ISOLATED 

MODERATE TSTMS WITHIN 270 NM E AND SE OF TROUGH S OF 27N.

.24 HOUR FORECAST TROUGH MERGED WITH COMPLEX LOW DESCRIBED ABOVE.



.FRONT 30N179W 27N179W MOVING NE SLOWLY. 

.24 HOUR FORECAST FRONT 30N178W 28N179W. 

.48 HOUR FORECAST FRONT MOVED N OF AREA. 



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



.SEAS 3 TO 4.5 M N OF A LINE 25N157W 22N173W 23N180W. SEAS 

2.5 TO 3 M ELSEWHERE NW OF A LINE 30N143W 25N150W 22N160W 15N170W

12N180W.

.24 HOUR FORECAST SEAS 4 TO 6 M N OF LINE 27N150W 25N165W 

23N171W. SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 30N144W 24N150W 

17N162W 11N180W.

.48 HOUR FORECAST SEAS 3 TO 4 M N OF A LINE 30N153W 23N160W 23N170W.

SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 30N145W 25N150W 11N164W 

10N180W.



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



.ITCZ 06N150W 07N160W 05N179W. ISOLATED MODERATE TSTMS WITHIN

150 NM OF ITCZ.







$$



.FORECASTER TSAMOUS. HONOLULU HI.