185
FZPN40 PHFO 171515
HSFNP

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 29N160W 24N162W 19N162W MOVING W SLOWLY. ISOLATED
MODERATE TSTMS N OF 21N BETWEEN 164W AND 158W.
.24 HOUR FORECAST TROUGH 28N164W 19N167W.
.48 HOUR FORECAST TROUGH 26N167W 20N168W.

.TROUGH 10N177E 03N173E MOVING W 10 KT. ISOLATED MODERATE TSTMS
WITHIN 210 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 12N169E 08N167E.
.48 HOUR FORECAST TROUGH MOVED W OF AREA.

.24 HOUR FORECAST NEW FRONT 30N165E 28N161E. WINDS 20 TO 25 KT AND SEAS
2.5 TO 4 M N OF LINE 30N162E 28N160E.
.48 HOUR FORECAST FRONT MOVED N OF AREA. WINDS MOVED N OF AREA.
SEAS 2.5 TO 3 M N OF LINE 30N170E 21N160E.

.WINDS 20 KT OR LESS OVER REMAINDER FORECAST AREA.

.SEAS 2.5 TO 4 M N OF LINE 30N163W 24N164W 20N154W 15N151W
13N140W.
.24 HOUR FORECAST SEAS 2.5 TO 3 M N OF LINE 30N167W 25N168W
21N159W 14N161W 12N140W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M N OF 24N BETWEEN 172W AND 147W.

.SEAS 2.5 M OR LESS OVER REMAINDER FORECAST AREA.

.ITCZ 06N140W 10N153W 10N168W 07N179E. SCATTERED MODERATE TSTMS
FROM 16N TO 06N BETWEEN 171W AND 150W...AND WITHIN 180 NM
ELSEWHERE.

.SCATTERED MODERATE TSTMS FROM 27N TO 17N BETWEEN 160W AND
144W...AND FROM 22N TO 12N W OF 171E.


$$

.FORECASTER PIERCE. HONOLULU HI.