331
FZPN40 PHFO 181503
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC SAT OCT 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 1200 UTC OCT 18 2025.
24 HOUR FORECAST VALID 1200 UTC OCT 19 2025.
48 HOUR FORECAST VALID 1200 UTC OCT 20 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 11N172E 05N168E MOVING W 10 KT. ISOLATED MODERATE
TSTMS WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 14N165E 11N163E.
.48 HOUR FORECAST TROUGH MOVED W OF AREA.

.FRONT 30N167E 25N160E MOVING E 10 KT. WINDS 20 TO 25
KT N OF FRONT.
.24 HOUR FORECAST FRONT 30N169E 27N160E. WINDS LOWERED
TO 20 KT OR LESS.
.48 HOUR FORECAST WEAK FRONT 30N170W 28N167E 28N160E.

.WINDS 20 KT OR LESS OVER REMAINDER FORECAST AREA.

.SEAS 4 TO 5 M N OF A LINE FROM 30N161E TO 29N160E. SEAS
2.5 TO 4 M ELSEWHERE N OF LINE FROM 30N162E
28N160E. SEAS 2.5 TO 4 M BOUNDED BY AREA 30N140W 21N140W
19N151W 27N168W 30N150W 30N140W.
.24 HOUR FORECAST SEAS 2.5 TO 3.5 M N OF LINE FROM 30N171E
TO 21N160E.
.48 HOUR FORECAST SEAS LOWERED TO 2.5M OR LESS.

.SEAS 2.5 M OR LESS OVER REMAINDER FORECAST AREA.

.ITCZ 08N140W 07N150W 08N157W 06N168W. ISOLATED MODERATE TSTMS
WITHIN 120 NM OF ITCZ.

.SCATTERED MODERATE TSTMS FROM 26N TO 22N BETWEEN 158W TO
161W.

.ISOLATED MODERATE TSTMS FROM 20N TO 14N BETWEEN 175W AND
172E.

$$

.FORECASTER THOMAS. HONOLULU HI.