FZPN40 PHFO 272208

HSFNP 



HIGH SEAS FORECAST

NATIONAL WEATHER SERVICE HONOLULU HI

2300 UTC MON OCT 27 2025



SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 160E



SYNOPSIS VALID 1800 UTC OCT 27 2025.

24 HOUR FORECAST VALID 1800 UTC OCT 28 2025.

48 HOUR FORECAST VALID 1800 UTC OCT 29 2025.



.WARNINGS.





.NONE.



.SYNOPSIS AND FORECAST.



.FRONT 30N161W 28N164W 27N170W 27N175W MOVING E 20 KT. NE WINDS 20

TO 25 KT N OF FRONT. ISOLATED MODERATE TSTMS WITHIN 120 NM OF 

FRONT N OF 28N. 

.24 HOUR FORECAST WEAK FRONT 30N152W 28N158W THENCE TROUGH

26N163W. NE WINDS 20 TO 25 KT N OF FRONT.

.48 HOUR FORECAST FRONT WEAKENED TO TROUGH 30N153W 27N157W 24N158W.

WINDS EASED 20 KT OR LESS.



.TROUGH 30N156W 17N164W 09N173W NEARLY STATIONARY. SCATTERED 

MODERATE TO LOCALLY STRONG TSTMS WITHIN 270 NM OF TROUGH S OF 

15N. ISOLATED MODERATE TSTMS ELSEWHERE WITHIN 150 NM OF TROUGH N OF

24N.

.24 HOUR FORECAST TROUGH 24N161W 14N163W.

.48 HOUR FORECAST TROUGH 24N158W 18N160W 14N163W.



.LOW NEAR 09N140W 1009 MB MOVING W 10KT. WINDS 20 TO 25 KT WITHIN

90 NM OF LOW. ISOLATED MODERATE TSTMS WITHIN 90 NM OF LOW.

.24 HOUR FORECAST LOW NEAR 10N143W 1009 MB. NEW TROUGH FROM 

13N140W TO LOW TO 08N144W. WINDS 20 TO 25 KT WITHIN 90 NM N 

SEMICIRCLE.

.48 HOUR FORECAST LOW NEAR 10N146W 1011 MB. TROUGH FROM 12N145W TO 

LOW TO 08N147W. WINDS DECREASED TO 20 KT OR LESS.



.24 HOUR FORECAST WINDS 20 TO 25 KT FROM 23N TO 10N W OF 171W.

.48 HOUR FORECAST WINDS 20 TO 25 KT FROM 21N TO 10N BETWEEN 162E 

AND 173W.



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



.SEAS 2.5 TO 3 M N OF LINE 30N166W 28N177W 30N173E...AND FROM 24N 

TO 16N BETWEEN 180E AND 160E.

.24 HOUR FORECAST SEAS 2.5 TO 3 M N OF LINE 30N152W 26N160W 

25N167W...AND FROM 24N TO 10N W OF 173W.

.48 HOUR FORECAST SEAS 2.5 TO 3 M FROM 22N TO 11N W OF 178W.



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



.MONSOON TROUGH 10N140W 08N143W THENCE ITCZ 08N154W 08N163W 

08N170W...AND 08N177W 06N163E 06N160E. SCATTERED MODERATE TSTMS 

WITHIN 180 NM OF ITCZ W OF 150W.



.ISOLATED MODERATE TSTMS FROM 15N TO 17N BETWEEN 176W AND 180W.







$$



.FORECASTER TSAMOUS. HONOLULU HI.