105
FZPN40 PHFO 092231
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC THU OCT 09 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 OCT 09 2025.
24 HOUR FORECAST VALID 1800 UTC OCT 10 2025.
48 HOUR FORECAST VALID 1800 UTC OCT 11 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N154W 27N157W 25N162W NEARLY STATIONARY. ISOLATED
MODERATE TSTMS WITHIN 150 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 30N153W 25N159W 20N168W.
.48 HOUR FORECAST TROUGH 30N152W 27N157W 22N170W.

.TROUGH 27N177W 22N175W 19N173W MOVING W SLOWLY. ISOLATED
MODERATE TSTMS WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH DISSIPATED.

.LOW NEAR 12N162W 1011 MB. TROUGH FROM 15N158W TO LOW TO 06N179W.
LOW AND TROUGH MOVING NW SLOWLY. ISOLATED MODERATE TSTMS WITHIN
210 NM OF LOW AND TROUGH.
.24 HOUR FORECAST LOW NEAR 13N163W 1012 MB. TROUGH FROM 17N161W
TO LOW TO 07N179E.
.48 HOUR FORECAST LOW DISSIPATED. TROUGH 19N165W 15N167W 12N167W.

.TROUGH 30N170E 27N165E MOVING E 10 KT.
.24 HOUR FORECAST TROUGH 30N175E 27N169E.
.48 HOUR FORECAST TROUGH ABSORBED BY FRONT DESCRIBED BELOW.

.24 HOUR FORECAST NEW FRONT 30N162E 28N160E. WINDS 20 TO 25 KT N
OF 27N W OF 167E. SEAS 4 TO 5 M N OF 29N W OF 162E. SEAS 2.5 TO 4
M ELSEWHERE N OF A LINE 30N167E 26N160E.
.48 HOUR FORECAST FRONT 30N173E 25N160E. ASSOCIATED WINDS MOVED N
OF AREA. SEAS 4 TO 5.5 M N OF A LINE 30N175E 25N168E 26N160E.
SEAS 2.5 TO 4 M ELSEWHERE N OF A LINE 30N178W 26N174E 23N167E
22N160E.

.48 HOUR FORECAST NEW LOW NEAR 11N154W 1013 MB. TROUGH FROM
14N152W TO LOW TO 09N156W.

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

.ITCZ 10N140W 10N153W...AND 07N175E 06N168E 04N160E.
ISOLATED MODERATE TSTMS WITHIN 210 NM OF ITCZ.

.ISOLATED MODERATE TSTMS FROM 20N TO 16N BETWEEN 164E AND 167E.

$$

.FORECASTER TROTTER. HONOLULU HI.