523
FZPN40 PHFO 022123
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC SAT AUG 02 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 AUG 02 2025.
24 HOUR FORECAST VALID 1800 UTC AUG 03 2025.
48 HOUR FORECAST VALID 1800 UTC AUG 04 2025.

.WARNINGS.


.NONE.

.SYNOPSIS AND FORECAST.

.LOW FORMER TROPICAL CYCLONE IONA NEAR 18N176E 1008 MB MOVING NW 15
KT. WINDS 20 TO 30 KT FROM 15N TO 22N BETWEEN 180E AND 175E.
SEAS 2.5 TO 4 M WITHIN 210 NM OF LOW. SEAS 2.5 TO 3 M ELSEWHERE
FROM 14N TO 22N BETWEEN 177E AND 172W. NUMEROUS STRONG TSTMS WITHIN
120 NM OF LOW. SCATTERED MODERATE TSTMS ELSEWHERE FROM 11N TO 22N
BETWEEN 177W AND 174E.
.24 HOUR FORECAST LOW 20N174E 1011 MB. WINDS 20 TO 30 KT FROM 18N
TO 23N BETWEEN 174E AND 180W. SEAS 2.5 TO 4 M FROM 18N TO 25N
BETWEEN 174E AND 180W.
.48 HOUR FORECAST LOW 22N170E 1012 MB. WINDS 20 TO 25 KT FROM 21N
TO 25N BETWEEN 172E AND 169E. SEAS 2.5 TO 3M TO 22N TO 27N BETWEEN
172E AND 176E.

SEE BULLETIN TCMCP1 ISSUED BY CPHC FOR MORE INFORMATION

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE AND
INTENSITY.

.LOW 1013 MB NEARLY STATIONARY. TROUGH FROM LOW TO 30N168E.
.24 HOUR FORECAST LOW 27N165E. TROUGH 30N166E TO LOW TO 22N160E.
WINDS 20 TO 25 KT WITHIN 120 NM E SEMICIRCLE OF LOW.
.48 HOUR FORECAST LOW MOVED W OF AREA. TROUGH 20N165E 25N160E.
WINDS DECREASED 20 KT OR BELOW.

.TROUGH 12N160W 06N162W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH 10N169W 05N170W.
.48 HOUR FORECAST TROUGH 10N174W 04N178E.

.NE TO E WINDS 20 TO 30 KT FROM 23N TO 10N E OF 178W.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 23N TO 10N E OF
180W.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 19N TO 11N BETWEEN
151W AND 176W. WINDS 20 TO 30 KT FROM 28N TO 21N W OF 144W.

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

.24 HOUR FORECAST SEAS 2.5 TO 3 M FROM 12N TO 20N E OF 150W.
.48 HOUR FORECAST SEAS 2.5 TO 4 M N OF 12N E OF 145W.

.SEAS 2.5 M OR LOWER REMAINDER OF FORECAST AREA.

.ITCZ 06N140W 09N156W...AND 09N178W 08N161E. SCATTERED MODERATE
TSTMS WITHIN 120 NM OF ITCZ.

.ISOLATED MODERATE TSTMS N OF 27N BETWEEN 169W AND 178W.

$$

.FORECASTER FOSTER. HONOLULU HI.