817
FZPN40 PHFO 030316
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC SUN AUG 03 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 03 2025.
24 HOUR FORECAST VALID 0000 UTC AUG 04 2025.
48 HOUR FORECAST VALID 0000 UTC AUG 05 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW FORMER IONA 18N176E 1008 MB MOVING NW SLOWLY. TROUGH 16N173E
TO LOW. WINDS 20 TO 30 KT WITHIN 210 NM N SEMICIRCLE OF LOW.
SCATTERED MODERATE TSTMS FROM 22N TO 15N BETWEEN 177W AND 174E.
.24 HOUR FORECAST LOW 20N172E 1013 MB. WINDS 20 TO 30 KT FROM 18N
TO 25N BETWEEN 175E AND 171E.
.48 HOUR FORECAST LOW BECOMES TROUGH 24N167E 20N165E. WINDS 20 TO
25 KT FROM 23N TO 26N BETWEEN 172E AND 169E.

.LOW 1012 MB MOVING N 10 KT. TROUGH FROM LOW TO 30N168E NEARLY
STATIONARY. SCATTERED MODERATE TSTMS FROM 22N TO 25N W OF 166E.
.24 HOUR FORECAST LOW 27N164E. 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 20N163E 25N160E.
WINDS DECREASED 20 KT OR BELOW.

.TROUGH 12N161W 06N163W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH 10N169W 05N170W.
.48 HOUR FORECAST TROUGH 10N174W 04N178E.

.48 HOUR FORECAST NEW LOW REMNANT OF TROPICAL CYCLONE GIL 22N143W.
WINDS 20 TO 30 KT FROM 21N TO 28N E OF 146W.

SEE BULLETIN TCMEP2 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.

.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 20N TO 10N E
BETWEEN 145W AND 175W. WINDS 20 TO 30 KT FROM 27N TO 20N W OF
143W.
.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.

.SEAS 2.5 TO 4 M FROM 16N TO 24N BETWEEN 180E AND 174E.
.24 HOUR FORECAST SEAS 2.5 TO 4 M FROM 18N TO 26N BETWEEN
176E AND 170E. SEAS 2.5 TO 4 M FROM 26N TO 16N E OF 143W.
.48 HOUR FORECAST SEAS 2.5 TO 4 M N OF 19N E OF 148W.

.SEAS 2.5 M OR LOWER REMAINDER OF FORECAST AREA.

.ITCZ 06N140W 09N156W. SCATTERED MODERATE TSTMS WITHIN 120 NM
OF ITCZ.

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

$$

.FORECASTER FOSTER. HONOLULU HI.