The High Seas Forecast for the Central North Pacific

High Seas Forecast Issued: 09/30/2025 01:06:14 AM UTC
                        
709
FZPN40 PHFO 291506
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC MON SEP 29 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 SEP 29 2025.
24 HOUR FORECAST VALID 1200 UTC SEP 30 2025.
48 HOUR FORECAST VALID 1200 UTC OCT 01 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WEAK FRONT 27N140W 26N145W 25N150W MOVING SE SLOWLY.
.24 HOUR FORECAST WEAK FRONT 23N140W 24N151W.
.36 HOUR FORECAST FRONT DISSIPATED.

.TROUGH 30N166E 25N163E 23N162E NEARLY STATIONARY. ISOLATED
MODERATE TSTMS WITHIN 210 NM OF TROUGH S OF 26N.
.24 HOUR FORECAST TROUGH MOVED N OF AREA.

.TROUGH 12N152W 06N156W 06N158W 06N162W MOVING W 10 KT. SCATTERED
MODERATE TSTMS WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 11N160W 08N165W.
.48 HOUR FORECAST TROUGH DISSIPATED.

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

.SEAS 2.5 TO 3 M N OF LINE 30N140W 28N165W 22N179W.
.24 HOUR FORECAST SEAS LOWERED TO 2.5 M OR LOWER.

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

.ITCZ 11N140W 10N151W...AND 07N159W 05N172W. ISOLATED MODERATE
TSTMS WITHIN 120 NM OF ITCZ W OF 168W.

.ISOLATED MODERATE TSTMS WITHIN 120 NM OF 24N162W. SCATTERED
MODERATE TSTMS WITHIN 12O NM OF A LINE FROM 25N162E 11S162E...AND
BETWEEN FROM 05N TO 13N BETWEEN 178W AND 169E.

$$

.FORECASTER BLOOD. HONOLULU HI.