FZPS40 PHFO 091025

HSFSP 



HIGH SEAS FORECAST

NATIONAL WEATHER SERVICE HONOLULU HI

1130 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC MAY 09 2025.

24 HOUR FORECAST VALID 0600 UTC MAY 10 2025.

48 HOUR FORECAST VALID 0600 UTC MAY 11 2025.



.WARNINGS.



...GALE WARNING...

.TROUGH 25S148W 16S150W 12S158W 13S170W 16S177E NEARLY STATIONARY.

WINDS 20 TO 25 KT S OF 12S BETWEEN 156W AND 172E. SCATTERED 

MODERATE TSTMS WITHIN 240 NM OF TROUGH S OF 16S...AND S OF 03S 

BETWEEN 158W AND 170E.

.24 HOUR FORECAST NEW LOW NEAR 16S173E 1004 MB. 25S149W 15S154W 

15S172W 18S178E TO LOW TO 12S160E. WINDS 20 TO 25 KT S OF 16S 

BETWEEN 167W AND 172E...AND S OF 20S BETWEEN 144W AND 149W.

.48 HOUR FORECAST NEW LOW 18S177W 999 MB. TROUGH 25S148W 18S153W 

15S166W TO NEW LOW TO SECOND LOW TO 11S160E. WINDS 30 TO 40 KT 

FROM 22S TO 15S BETWEEN 174W AND 179W. WINDS 20 TO 30 KT ELSEWHERE

S OF 13S BETWEEN 170W AND 177E...AND S OF 18S W OF 177E.



.SYNOPSIS AND FORECAST.



.TROUGH 25S171E 18S168E 13S160E MOVING NE SLOWLY. WINDS 20 TO 30

KT S OF 13S BETWEEN 156W AND 172E...AND S OF LINE 25S164E 22S161E

16S167E 15S160E. ISOLATED MODERATE TSTMS WITHIN 90 NM OF TROUGH.

.24 HOUR FORECAST TROUGH 25S172E 14S165E 13S160E. WINDS S OF LINE

25S170E 17S165E 14S160E. 

.48 HOUR FORECAST MERGES WITH TROUGH DESCRIBED IMMEDIATELY ABOVE.



.48 HOUR FORECAST WINDS 20 TO 25 KT S OF 23S E OF 135W.



.WINDS 20 KT OR LESS REMAINDER OF FORECAST AREA.



.SEAS 12 TO 16 FT S OF LINE 25S146W 20S153W 12S169W 14S179W

21S176E 25S177E. SEAS 8 TO 12 FT ELSEWHERE S OF LINE 06S120W

12S131W 05S135W 19S141W 16S152W 11S153W 00S149W 00S170W 16S169E

25S168E.

.24 HOUR FORECAST SEAS 12 TO 13 FT FROM 18S TO 16S BETWEEN 171W 

AND 179W...FROM 22S TO 19S BETWEEN 179E AND 172E...AND S OF LINE 

25S165E 23S160E. SEAS 8 TO 12 FT ELSEWHERE S OF LINE 02S120W 

01S122W 03S129W 19S140W 19S150W 01S170W 16S178E 14S160E.

.48 HOUR FORECAST SEAS 12 TO 14 FT S OF 23S W OF 170E...AND FROM

22S TO 18S BETWEEN 173W AND 178E. SEAS 8 TO 12 FT ELSEWHERE S OF

LINE 24S120W 20S128W 21S143W 23S150W 16S158W 13S174E 18S179W

13S160E.



.SEAS 8 FT OR LOWER REMAINDER OF FORECAST AREA.



.ITCZ 11S120W 09S135W 04S145W. ISOLATED MODERATE TSTMS WITHIN 270

NM S OF ITCZ.





$$



.FORECASTER PIERCE. HONOLULU HI.