259 

FZPN40 PHFO 171452
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC FRI APR 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 APR 17 2026.
24 HOUR FORECAST VALID 1200 UTC APR 18 2026.
48 HOUR FORECAST VALID 1200 UTC APR 19 2026.

.WARNINGS.


.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N150W 28N153W 24N157W MOVING E SLOWLY.
.24 HOUR FORECAST TROUGH MERGED WITH NEW FRONT 30N144W 29N147W
28N151W THENCE TROUGH 25N156W.
.48 HOUR FORECAST FRONT 27N140W 26N145W THENCE TROUGH 26N154W.

.24 HOUR FORECAST NEW TROUGH 27N164W 25N168W 21N171W.
.48 HOUR FORECAST NEW LOW NEAR 28N168W 1015 MB. TROUGH 29N160W
29N164W TO LOW. ANOTHER TROUGH FROM LOW TO 24N167W 20N170W. WINDS
20 TO 25 KT N OF 28N BETWEEN 158W AND 162W.

.48 HOUR FORECAST NEW FRONT 30N177W 28N180W.

.WINDS 20 KT OR LESS OVER REMAINDER FORECAST AREA.

.SEAS 2.5 M OR LOWER OVER ENTIRE FORECAST AREA.

.ITCZ 04N140W 06N160W 06N168W 04N176W 03N180W. NUMEROUS MODERATE
TSTMS WITHIN 210 NM N OF ITCZ...AND WITHIN 150 NM S OF ITCZ.

.ISOLATED MODERATE TSTMS FROM 10N TO 14N BETWEEN 156W AND
173W...AND FROM 17N TO 20N BETWEEN 169W AND 175W.



$$

.FORECASTER TSAMOUS. HONOLULU HI.