FZPN40 PHFO 212231

HSFNP 



HIGH SEAS FORECAST

NATIONAL WEATHER SERVICE HONOLULU HI

2300 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC MAR 21 2026.

24 HOUR FORECAST VALID 1800 UTC MAR 22 2026.

48 HOUR FORECAST VALID 1800 UTC MAR 23 2026.



.WARNINGS.



...GALE WARNING...

.LOW NEAR 27N155W 1007 MB MOVING NE 15 KT. WARM FRONT FROM LOW TO

30N150W. TROUGH FROM LOW TO 23N163W TO 20N172W. SECOND TROUGH 

FROM LOW TO 20N158W TO 14N169W. WINDS 30 TO 35 KT N OF 27N BETWEEN 

155W AND 147W. WINDS 20 TO 30 KT ELSEWHERE N OF LINE 30N168W 

25N166W 28N152W 27N147W 30N146W. SCATTERED MODERATE TSTMS WITHIN 

150 NM OF LOW...WARM FRONT...AND TROUGHS.

.24 HOUR FORECAST LOW MOVED N OF AREA. NEW COLD FRONT 30N150W 

27N152W THENCE TROUGH 22N156W 16N162W 13N170W. SECOND TROUGH 

MERGED WITH FIRST TROUGH. WINDS 20 TO 25 KT N OF 27N BETWEEN 156W 

AND 142W.

.48 HOUR FORECAST COLD FRONT 30N143W 25N148W THENCE TROUGH 

18N160W 14N170W. WINDS EASED TO 20 KT OR LESS.



.SYNOPSIS AND FORECAST.



.FRONT 30N178W 27N180W NEARLY STATIONARY AND DISSIPATING. 

.24 HOUR FORECAST FRONT DISSIPATED. 



.48 HOUR FORECAST NEW TROUGH 22N148W 10N156W.



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



.SEAS 4 TO 5 M N OF LINE 30N169W 25N170W 25N159W 28N150W 30N149W.

SEAS 2.5 TO 4 M NW OF LINE 30N145W 14N167W 09N180W.

.24 HOUR FORECAST SEAS 2.5 TO 3 M N OF LINE 30N144W 22N159W 

09N166W 08N180E.

.48 HOUR FORECAST SEAS 2.5 TO 3 M N OF LINE 30N168W 20N180W 

17N180W 16N169W 30N150W.



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



.ITCZ 05N140W 08N159W 08N169W 07N180E. ISOLATED MODERATE TSTMS 

WITHIN 210 NM OF ITCZ W OF 153W.



.ISOLATED MODERATE TSTMS FROM 27N TO 25N BETWEEN 168W AND 163W.



$$



.FORECASTER TROTTER. HONOLULU HI.