672
FZPN40 PHFO 182231
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC FRI SEP 18 2026

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 180W

SYNOPSIS VALID 1800 UTC SEP 18 2026.
24 HOUR FORECAST VALID 1800 UTC SEP 19 2026.
48 HOUR FORECAST VALID 1800 UTC SEP 20 2026.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 23N160W 18N163W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH DISSIPATED.

.LOW 12N158W 1008 MB MOVING W 5 KT.
.24 HOUR FORECAST LOW 12N161W 1008 MB.
.48 HOUR FORECAST LOW 12N163W 1012 MB.

.24 HOUR FORECAST NEW LOW 16N140W 1011 MB.
.48 HOUR FORECAST LOW 15N145W 1011 MB.

.NE WINDS 20 TO 25 KT FROM 15N TO 20N BETWEEN 143W AND 140W.
.24 HOUR FORECAST WINDS DIMINISHING TO 20 KT OR LESS.

.SEAS 2.5 TO 3 M FROM 15N TO 20N E OF 146W.
.24 HOUR FORECAST SEAS 2.5 TO 3 M FROM 15N TO 22N BETWEEN 150W
AND 143W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M FROM 17N TO 20N BETWEEN 151W
AND 147W.

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

.MONSOON TROUGH 05N180W 07N170W 12N158W 09N145W 12N140W. SCATTERED
MODERATE TSTMS FROM 07N TO 10N BETWEEN 173W AND 165W...AND FROM
10N TO 15N BETWEEN 165W AND 145W.

.ISOLATED MODERATE TSTMS WITHIN 90 NM OF POINT 20N161W...AND FROM
EQUATOR TO 05N BETWEEN 155W AND 145W.

$$

.FORECASTER PECHACEK. HONOLULU HI.