FZPN40 PHFO 211506

HSFNP 



HIGH SEAS FORECAST

NATIONAL WEATHER SERVICE HONOLULU HI

1700 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC MAR 21 2026.

24 HOUR FORECAST VALID 1200 UTC MAR 22 2026.

48 HOUR FORECAST VALID 1200 UTC MAR 23 2026.



.WARNINGS.



...GALE WARNING...

.COMPLEX LOW 23N161W 1008 MB NEARLY STATIONARY. SECOND LOW 

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

27N155W 29N149W 30N147W MOVING NE SLOWLY. TROUGH FROM SECOND LOW 

TO 23N159W TO FIRST LOW TO 23N164W 19N172W 18N174W. SECOND TROUGH 

FROM SECOND LOW TO 23N157W 18N160W 16N162W 14N166W 11N175W 11N180W

MOVING SE SLOWLY. WINDS 30 TO 35 KT N OF 27N BETWEEN 150W AND 158W.

WINDS 20 TO 30 KT ELSEWHERE N OF LINE 26N148W 25N154W 25N163W

30N167W. SCATTERED MODERATE TSTMS WITHIN 120 NM OF WARM FRONT AND 

LOWS...AND WITHIN 180 NM E OF SECOND TROUGH N OF 15N...AND FROM

22N TO 27N BETWEEN 162W AND 169W.

.24 HOUR FORECAST LOW 30N154W 1007 MB. TROUGH FROM LOW TO 

24N156W 20N158W 13N168W 11N180W. WINDS 20 TO 30 KT ELSEWHERE N OF 

25N BETWEEN 143W AND 156W.

.48 HOUR FORECAST LOW MOVED N OF AREA. FRONT 30N147W 27N150W 

THENCE TROUGH 21N156W 14N168W. WINDS 20 TO 25 KT FROM 19N TO 24N 

BETWEEN 165W AND 176W.



.SYNOPSIS AND FORECAST.



.TROUGH 30N178W 26N180W NEARLY STATIONARY AND DISSIPATING. 

.24 HOUR FORECAST TROUGH DISSIPATED. 



.48 HOUR FORECAST NEW TROUGH 24N148W 16N154W 12N160W.



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



.SEAS 4 TO 5 M N OF LINE 30N148W 25N154W 21N174W. SEAS 2.5 TO 4 M

ELSEWHERE N OF A LINE 30N143W 16N162W 11N180W. 

.24 HOUR FORECAST SEAS 2.5 TO 3.5 M N OF LINE 30N144W 10N165W

09N180W. 

.48 HOUR FORECAST SEAS 2.5 TO 3 M N OF LINE 30N144W 25N158W 

15N168W 17N176W.



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



.ITCZ 05N140W 05N159W 06N164W 04N174W 04N180W. ISOLATED MODERATE 

TSTMS WITHIN 180 NM PRIMARILY N OF ITCZ W OF 154W. 





$$



.FORECASTER TSAMOUS. HONOLULU HI.