879
FZPN40 PHFO 182218
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC FRI JUL 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 JUL 18 2025.
24 HOUR FORECAST VALID 1800 UTC JUL 19 2025.
48 HOUR FORECAST VALID 1800 UTC JUL 20 2025.

.WARNINGS.


.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 29N165E 27N161E 25N160E MOVING W 10 KT. SCATTERED MODERATE
TSTMS FROM 20N TO 27N BETWEEN 174E AND TROUGH.
.24 HOUR FORECAST TROUGH MOVED W OF AREA.

.TROUGH 17N162E 11N160E MOVING W 10 KT. SCATTERED MODERATE TSTMS
WITHIN 270 NM E OF TROUGH.
.24 HOUR FORECAST TROUGH MOVED W OF AREA.

.24 HOUR FORECAST E WINDS 20 TO 25 KT FROM 10N TO 16N BETWEEN 173W
AND 170E.
.48 HOUR FORECAST E WINDS 20 TO 25 KT S OF 06N BETWEEN 164W AND
171W.

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

.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.

.MONSOON TROUGH 10N140W 11N147W. ISOLATED MODERATE TSTMS WITHIN
210 NM OF TROUGH .

.ITCZ 11N148W 09N154W 08N163W 06N172E. ISOLATED MODERATE TSTMS
WITHIN 210 NM OF ITCZ W OF 177W.

.ISOLATED MODERATE TSTMS FROM 01N TO 15N W OF 176W.



$$

.FORECASTER TSAMOUS. HONOLULU HI.