The High Seas Forecast for the Central North Pacific

High Seas Forecast Issued: 12/05/2025 01:16:07 AM UTC
                        
178
FZPN40 PHFO 041516
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC THU DEC 04 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 DEC 04 2025.
24 HOUR FORECAST VALID 1200 UTC DEC 05 2025.
48 HOUR FORECAST VALID 1200 UTC DEC 06 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N157W 20N165W 15S172W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH 30N159W 23N164W 13N174W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.FRONT 30N162E 29N160E MOVING NE 10 KT. WINDS 20 TO 25 KT N OF
27N W OF 167E.
.24 HOUR FORECAST NEW FRONT 30N167W 29N160W. WINDS EASED 20 KT OR
LESS.
.48 HOUR FORECAST FRONT 30N168W 28N160W.

.WINDS 20 TO 25 KT FROM 21N TO 12N BETWEEN 164E AND 177W.
.24 HOUR FORECAST WINDS 20 TO 30 KT FROM 24N TO 09N BETWEEN 162E
AND 170W.
.48 HOUR FORECAST WINDS 20 TO 30 KT WITHIN AREA BOUNDED BY
17N160E 24N179E 24N172W 08N173E 07N168E 11N161E 17N160E.

.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.

.SEAS 4 TO 5 M N OF LINE 30N179E 26N174W 30N168W. SEAS 2.5 TO 4 M
ELSEWHERE N OF LINE 11N160E 07N172E 08N170W 23N160W 30N151W.
.24 HOUR FORECAST SEAS 4 TO 5 M FROM 22N TO 15N BETWEEN 174E AND
171W. SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 10N160E 05N174E 08N175W
15N169W 15N140W.
.48 HOUR FORECAST SEAS 4 TO 5 M FROM 22N TO 14N BETWEEN 174E TO
175W. SEAS 2.5 TO 4 M ELSEWHERE N OF 07N...EXCEPT N OF LINE
30N173E 25N172E 30N167W.

.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.

.ITCZ 04N140W 02N154W 03N170W 05N173E. ISOLATED MODERATE TSTMS
WITHIN 240 NM OF ITCZ.

.SCATTERED MODERATE TSTMS FROM 14N TO 07N E OF 153W.


$$

.FORECASTER PIERCE. HONOLULU HI.