664
FZPN40 PHFO 171509
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC MON NOV 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 NOV 17 2025.
24 HOUR FORECAST VALID 1200 UTC NOV 18 2025.
48 HOUR FORECAST VALID 1200 UTC NOV 19 2025.

.WARNINGS.

...GALE WARNING...
.FRONT 30N172W 23N170E THENCE TROUGH 20N160E MOVING E 25 KT. WINDS
20 TO 25 KT AND SEAS 2.5 TO 3 M N OF FRONT. ISOLATED MODERATE TSTMS
WITHIN 30 NM OF TROUGH.
.24 HOUR FORECAST FRONT 30N160W 23N170W 22N180E THENCE TROUGH 23N170E
22N160E. WINDS 30 TO 35 KT WITHIN 180 NM NW OF FRONT. WINDS 20 TO
30 KT ELSEWHERE AND SEAS 2.5 TO 4 M N OF FRONT.
.48 HOUR FORECAST FRONT 30N150W 21N160W THENCE TROUGH 21N170W 20N180E
21N174E. WINDS 20 TO 30 KT N OF FRONT AND TROUGH. SEAS 4 TO 5 M N
OF 25N BETWEEN 172E AND 165W. SEAS 2.5 TO 4 M N OF A LINE 30N158W
20N177W 20N160E.

.SYNOPSIS AND FORECAST.

.TROUGH 12N176E 05N174E MOVING W 10 KT. ISOLATED MODERATE TSTMS FROM
10N TO 13N BETWEEN 173E AND TROUGH.
.24 HOUR FORECAST TROUGH 08N173E 05N171E. WINDS 20 TO 25 KT FROM 10N
TO 13N BETWEEN 170E AND 175E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.24 HOUR FORECAST NEW TROUGH 23N156W 19N157W.
.48 HOUR FORECAST TROUGH MERGED WITH FRONT DESCRIBED IN WARNING SECTION.

.WINDS 20 KT OR LESS AND SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST
AREA.

.ITCZ 07N140W 09N154W 08N172W. ISOLATED MODERATE TSTMS WITHIN 150
NM N OF ITCZ.

$$

.FORECASTER SHIGESATO. HONOLULU HI.