FZPS40 PHFO 090326

HSFSP 



HIGH SEAS FORECAST

NATIONAL WEATHER SERVICE HONOLULU HI

0530 UTC FRI MAY 09 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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



SOUTH PACIFIC EQUATOR TO 25S BETWEEN 120W AND 160E



SYNOPSIS VALID 0000 UTC MAY 09 2025.

24 HOUR FORECAST VALID 0000 UTC MAY 10 2025.

48 HOUR FORECAST VALID 0000 UTC MAY 11 2025.



.WARNINGS.



.NONE.



.SYNOPSIS AND FORECAST.



.FRONT 25S145W 22S148W THENCE TROUGH 13S153W 10S158W 09S177W 

MOVING SW SLOWLY. ISOLATED MODERATE TSTMS WITHIN 180 NM OF FRONT

AND TROUGH S OF 15S.

.24 HOUR FORECAST FRONT WEAKENED TO TROUGH 25S150W 19S151W 

21S150W 13S160W 15S179W. 

.48 HOUR FORECAST TROUGH 25S151W 17S155W 15S170W 17S179E.



.TROUGH 02S145W 07S140W 10S138W MOVING SW 10 KT. ISOLATED

MODERATE TSTMS WITHIN 150 NM OF TROUGH. 

.24 HOUR FORECAST TROUGH DISSIPATED. 



.TROUGH 05S165E 09S170E 10S175E MOVING SE 15 KT.

.24 HOUR FORECAST TROUGH DISSIPATED. 



.TROUGH 13S160E 20S165E 25S165E MOVING NE 15 KT. 

.24 HOUR FORECAST TROUGH STRENGTHENS TO LOW. LOW 15S170E

1006 MB MOVING SE 10 KT. TROUGH FROM LOW TO 11S160E AND FROM 

LOW TO 16S175E. 

.48 HOUR FORECAST LOW 16S172E 1002 MB. TROUGH FROM LOW TO 

12S160E AND FROM LOW TO 15S175E. 



.24 HOUR FORECAST NEW LOW 16S178W 1006 MB. TROUGH FROM LOW TO

12S175W AND FROM LOW TO 12S175W. 

.48 HOUR FORECAST NEW LOW 17S178W 1002 MB. TROUGH FROM LOW TO 

16S175E AND FROM LOW TO 14S167W. 



.WINDS 20 TO 30 KT S OF LINE 15S160E 18S173E 10S170W 25S145W. 

.24 HOUR FORECAST WINDS 20 TO 30 KT S OF LINE 13S160E 15S170E

13S170W 13S160W 25S160W. WINDS 20 TO 25 KT ELSEWHERE E OF 

140W.

.48 HOUR FORECAST WINDS 20 TO 30 KT S OF LINE 15S160E 12S180W

15S170W 25S168W.  



.WINDS 20 KT OR LESS REMAINDER OF FORECAST AREA.



.SEAS 12 TO 16 FT S OF S OF LINE 25S180W 15S175W 13S170W 

20S160W 20S150W 25S148W. SEAS 8 TO 12 FT ELSEWHERE S OF LINE

15S170E 08S165W 20S140W 15S130W 25S125W. 

.24 HOUR FORECAST SEAS 8 TO 12 FT S OF LINE 20S160E 10S170W

20S140W 20S120W. 

.48 HOUR FORECAST SEAS 12 TO 15 FT S OF 28S W OF 165E. SEAS

8 TO 12 FT ELSEWHERE S OF LINE 15S160E 20S170E 15S175W 15S170W

20S160W 20S120W. 



.SEAS 8 FT OR LOWER REMAINDER OF FORECAST AREA.



.ISOLATED TO SCATTERED MODERATE TSTMS FROM 18S TO 05S BETWEEN

170E AND 160W. 







$$



.FORECASTER PECHACEK. HONOLULU HI.