021
FZPN40 PHFO 040259
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC MON AUG 04 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 04 2025.
24 HOUR FORECAST VALID 0000 UTC AUG 05 2025.
48 HOUR FORECAST VALID 0000 UTC AUG 06 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 25N166E 1002 MB MOVING NW 10 KT. SCATTERED MODERATE TSTMS
WITHIN 210 NM OF LOW...AND FROM 20N TO 30N W OF 165E. SEAS
2.5 TO 4 M WITHIN 120 NM OF LOW.
.24 HOUR FORECAST LOW 28N160E 1001 MB
.48 HOUR FORECAST LOW MOVED W OF FORECAST AREA.

.24 HOUR FORECAST NEW LOW 21N142W. WINDS 20 TO 30 KT WITHIN
180 NM OF LOW. WINDS 20 TO 30 KT WITHIN 180 NM OF N SEMICIRCLE
OF LOW. SEAS 2.5 TO 4 M WITHIN 330 NM OF LOW.
.48 HOUR FORECAST LOW 21N148W. WINDS 20 TO 30 KT WITHIN
180 NM OF LOW. SEAS 2.5 TO 4 M WITHIN 270 NM OF LOW.

.TROUGH 25N173E 18N169E MOVING N 15 KT. WINDS 20 TO 25 KT
WITHIN 180 NM OF POINT 23N172E.
.24 HOUR FORECAST TROUGH 30N170E 25N169E. WINDS 20 TO 25 KT
WITHIN 90 NM OF POINT 27N169E.
.48 HOUR FORECAST TROUGH DISSIPATED. WINDS DIMINISHING TO
LESS THAN 20 KT.

.WINDS 20 TO 25 KT FROM 10N TO 15N BETWEEN 160W AND
170W...AND FROM 20N TO 25N BETWEEN 175E AND 170E...AND FROM
20N TO 27N E OF 143W.
.24 HOUR FORECAST WINDS DIMINISHING TO LESS THAN 20 KT.

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

.SEAS 2.5 TO 4 M FROM 20N TO 28N BETWEEN 176E AND 170E...AND
FROM 11N TO 25N BETWEEN 172W AND 160W...AND FROM 15N TO 20N
BETWEEN 160W AND 155W...AND FROM 10N TO 25N E OF 144W.
.24 HOUR FORECAST SEAS 2.5 TO 4 M N OF 25N BETWEEN 175E AND
165E.
.48 HOUR FORECAST SEAS SUBSIDING TO LESS THAN 2.5 M.

.SEAS 2.5 M OR LOWER REMAINDER OF FORECAST AREA.

.ITCZ 09N170W 07N165W 06N160W...THENCE MONSOON TROUGH
07N150W 10N140W. SCATTERED MODERATE TSTMS WITHIN 180 NM
OF ITCZ BETWEEN 175W AND 160W. ELSEWHERE ISOLATED TSTMS WITHIN
120 NM OF ITCZ AND TROUGH.


$$

.FORECASTER PECHACEK. HONOLULU HI.