858 

FZPN40 PHFO 191004

HSFNP 



HIGH SEAS FORECAST

NATIONAL WEATHER SERVICE HONOLULU HI

1100 UTC TUE MAY 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC MAY 19 2026.

24 HOUR FORECAST VALID 0600 UTC MAY 20 2026.

48 HOUR FORECAST VALID 0600 UTC MAY 21 2026.



.WARNINGS.





.NONE.

   

.SYNOPSIS AND FORECAST.



.TROUGH 30N171W 26N172W 22N172W 19N172W MOVING E 10 KT. 

.24 HOUR FORECAST TROUGH 30N167W 27N170W 20N175W.

.48 HOUR FORECAST TROUGH DISSIPATED.



.WINDS 20 TO 25 KT N OF 10N E OF 152W.

.24 HOUR FORECAST WINDS 20 TO 25 KT N OF 10N E OF 157W.

.48 HOUR FORECAST WINDS 20 TO 25 KT N OF 10N E OF 163W.



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



.SEAS 2.5 TO 3.5 M IN AREA BOUNDED BY 30N150W 30N140W 02N140W 

11N170W 30N150W.

.24 HOUR FORECAST SEAS 2.5 TO 3.5 M IN AREA BOUNDED BY 30N152W 

30N140W 05N140W 11N172W 30N152W.

.48 HOUR FORECAST SEAS 2.5 TO 4 M IN AREA BOUNDED BY 30N150W 

30N140W 04N140W 08N180W 15N180W 30N150W.



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



.ITCZ 05N140W 06N152W 06N164W 04N173W 04N180W. ISOLATED MODERATE 

TSTMS WITHIN 210 NM OF ITCZ.





$$



.FORECASTER TSAMOUS. HONOLULU HI.