460 

FZPN40 PHFO 201506

HSFNP 



HIGH SEAS FORECAST

NATIONAL WEATHER SERVICE HONOLULU HI

1700 UTC WED MAY 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 MAY 20 2026.

24 HOUR FORECAST VALID 1200 UTC MAY 21 2026.

48 HOUR FORECAST VALID 1200 UTC MAY 22 2026.



.WARNINGS.



...GALE WARNING...

.24 HOUR FORECAST NE TO E WINDS 25 TO 35 KT AROUND THE MAIN 

HAWAIIAN ISLANDS. FOR DETAILS SEE COASTAL WATERS FORECAST ISSUED 

BY NWS HONOLULU UNDER AWIPS HEADER HFOCWFHFO AND WMO HEADER FZHW50

PHFO. 

.48 HOUR FORECAST WINDS 20 TO 30 KT FROM 21N TO 18N BETWEEN 157W 

AND 154W.

   

.SYNOPSIS AND FORECAST.



.TROUGH 30N170W 27N175W 20N176W MOVING NW 10 KT. 

.24 HOUR FORECAST WEAK TROUGH 30N176W 26N180W. 

.48 HOUR FORECAST TROUGH MOVED NW OF AREA.



.WINDS 20 TO 25 KT FROM 25N TO 11N E OF 149W...AND FROM 14N TO 10N

BETWEEN 173W AND 164W.

.24 HOUR FORECAST WINDS 20 TO 25 KT IN AREA BOUNDED BY 23N164W 

29N148W 29N143W 12N147W 08N179W 14N178W 23N164W.

.48 HOUR FORECAST WINDS 20 TO 25 KT FROM 27N TO 15N BETWEEN 167W 

AND 153W...AND FROM 15N TO 11N BETWEEN 172W AND 161W.



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



.SEAS 2.5 TO 3.5 M N OF 09N E OF 155W. SEAS 2.5 TO 3 M FROM 14N 

TO 10N BETWEEN 168W AND 159W.

.24 HOUR FORECAST SEAS 2.5 TO 3.5 M E OF LINE 27N157W 16N164W 

09N178W. 

.48 HOUR FORECAST SEAS 2.5 TO 3.5 M IN AREA BOUNDED BY 27N165W 

30N151W 30N142W 14N144W 08N150W 10N180W 15N180W 27N165W 



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



.ITCZ 04N140W 04N160W 04N180W. ISOLATED MODERATE TSTMS WITHIN 270

NM N OF ITCZ...AND 150 NM S OF ITCZ W OF 158W.





$$



.FORECASTER PIERCE. HONOLULU HI.