The High Seas Forecast for the Central North Pacific

High Seas Forecast Issued: 08/13/2025 01:10:50 PM UTC
                        
107
FZPN40 PHFO 130310
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC WED AUG 13 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 13 2025.
24 HOUR FORECAST VALID 0000 UTC AUG 14 2025.
48 HOUR FORECAST VALID 0000 UTC AUG 15 2025.

.WARNINGS.


.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N170E 26N165E 25N160E. SCATTERED TO NUMEROUS
STRONG TSTMS WITHIN 120 NM OF TROUGH. WINDS 20 TO 25
KT WITHIN 120 NM OF LOW AND TROUGH.
.24 HOUR FORECAST NEW LOW 1009 MB. TROUGH FROM LOW TO
30N178W AND FROM LOW TO 25N180W 24N170E. WINDS 20 TO 30
KT AND SEAS 2.5 M TO 4 M WITHIN 150 NM OF TROUGH AND LOW.
.48 HOUR FORECAST LOW MOVED N OF AREA. TROUGH 30N177W
27N180W 26N176E. WINDS DIMINISHED TO LESS THAN 20 KT AND
SEAS SUBSIDED TO LESS THAN 2 M.

.WEAK TROUGH 10N180W 05N179E 03N180W MOVING W 15 KT.
SCATTERED MODERATE TSTMS WITHIN 120 NM OF TROUGH.
.24 HOUR FORECAST TROUGH DISSIPATED.

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

.SEAS 2.5 M OR LOWER REMAINDER OF FORECAST AREA.

.MONSOON TROUGH 11N140W 12N149W THENCE ITCZ 12N160W
05N170W 05N173W.

.ISOLATED MODERATE TSTMS WITHIN 90 NM OF POINT 12N172E.


$$

.FORECASTER PECHACEK. HONOLULU HI.