964 

FZPN40 PHFO 171001
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC APR 17 2026.
24 HOUR FORECAST VALID 0600 UTC APR 18 2026.
48 HOUR FORECAST VALID 0600 UTC APR 19 2026.

.WARNINGS.


.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N151W 27N153W 25N156W 23N157W MOVING E SLOWLY.
.24 HOUR FORECAST TROUGH 30N145W 29N149W 24N156W.
.48 HOUR FORECAST TROUGH MOVED N OF AREA.

.24 HOUR FORECAST NEW TROUGH 25N167W 20N171W.
.48 HOUR FORECAST NEW LOW NEAR 27N168W. TROUGH 28N160W 29N164W
TO LOW. ANOTHER TROUGH FROM LOW TO 25N167W 21N170W. WINDS 20 TO 25
KT N OF 28N BETWEEN 158W AND 164W.

.48 HOUR FORECAST NEW FRONT 30N177W 28N180W.

.48 HOUR FORECAST NEW FRONT 27N140W 27N144W.

.WINDS 20 KT OR LESS OVER REMAINDER FORECAST AREA.

.SEAS 2.5 M OR LOWER OVER ENTIRE FORECAST AREA.

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

.ISOLATED MODERATE TSTMS FROM 10N TO 15N BETWEEN 157W AND 171W.



$$

.FORECASTER TSAMOUS. HONOLULU HI.