The High Seas Forecast for the Central North Pacific

High Seas Forecast Issued: 12/16/2025 08:39:08 AM UTC
                        
222
FZPN40 PHFO 152239
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC MON DEC 15 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC DEC 15 2025.
24 HOUR FORECAST VALID 1800 UTC DEC 16 2025.
48 HOUR FORECAST VALID 1800 UTC DEC 17 2025.

.WARNINGS.

...GALE WARNING...
.LOW 29N176W 1004 MB MOVING NE 10 KT. FRONT FROM LOW TO 27N175W
26N180W 30N176E MOVING E 10 KT. WINDS 30 TO 40 KT N OF 28N BETWEEN
165W AND 180W. WINDS 20 TO 30 KT ELSEWHERE N OF LINE 30N162W
22N175W 30N175E.
.24 HOUR FORECAST LOW MOVED N OF AREA. FRONT 30N151W 25N155W
22N160W. WINDS 30 TO 35 KT N OF 28N BETWEEN 160W AND 175W.
WINDS 20 TO 30 KT ELSEWHERE N OF LINE 30N155W 22N165W 30N180W.
.48 HOUR FORECAST FRONT 30N155W 25N160W 20N165W. WINDS 20 TO
35 KT N OF LINE 30N150W 24N160W 30N175W.

.SYNOPSIS AND FORECAST.

.TROUGH 30N144W 25N155W 22N160W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH DISSIPATED.

.FRONT 30N160E MOVING E 15 KT.
.24 HOUR FORECAST FRONT 30N169E 25N165E 22N160E.
.48 HOUR FORECAST FRONT 30N174E 25N170E 23N168E.

.SEAS 4 TO 6 M N OF LINE 30N174W 25N175W 22N180W 30N175E. SEAS
2.5 TO 4 M ELSEWHERE N OF LINE 30N160E 20N180W 10N170W 30N140W.
.24 HOUR FORECAST SEAS 4 TO 6.5 M N OF LINE 30N160W 25N170W
30N178E. SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 25N160E 20N170E
15N180W 16N170W 30N140W...AND FROM 08N TO 15N BETWEEN 140W AND
165W.
.48 HOUR FORECAST SEAS 4 TO 6 M N OF LINE 30N155W 25N160W 25N175W
30N178W. SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 18N160E 08N170E
08N170W 20N160W 30N143W.

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

.ITCZ 07N140W 06N145W 09N153W 07N160W 10N171W 05N169E. ISOLATED
MODERATE TSTMS WITHIN 150 NM OF ITCZ W OF 150W.

.NUMEROUS STRONG TSTMS N OF 25N BETWEEN 158W AND 164W. SCATTERED
MODERATE TSTMS WITHIN 120 NM OF LINE 30N153W 22N157W...AND
N OF 25N BETWEEN 164W AND 175W.

$$

.FORECASTER PECHACEK. HONOLULU HI.