904
FZPN40 PHFO 182034
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC SAT JUL 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 JUL 18 2026.
24 HOUR FORECAST VALID 1800 UTC JUL 19 2026.
48 HOUR FORECAST VALID 1800 UTC JUL 20 2026.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 14N173W 1008 MB MOVING W SLOWLY. WINDS 20 TO 25 KT FROM
19N TO 16N BETWEEN 175W AND 169W. ISOLATED MODERATE
TSTMS WITH 270 NM OF LOW.
.24 HOUR FORECAST LOW NEAR 14N177W. WINDS EASED 20 KT OR LESS.
.48 HOUR FORECAST LOW MOVED W OF AREA.

.LOW NEAR 04N152W 1010 MB NEARLY STATIONARY. ISOLATED MODERATE
TSTMS WITH 180 NM OF LOW.
.24 HOUR FORECAST LOW DISSIPATED.

.TROUGH 30N168W 25N171W NEARLY STATIONARY. ISOLATED TSTMS N OF
26N W OF 169W.
.24 HOUR FORECAST TROUGH DISSIPATED.

.WINDS 20 TO 25 KT FROM 19N TO 12N BETWEEN 158W AND 148W.
.24 HOUR FORECAST WINDS EASED 20 KT OR LESS.

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

.SEAS 2.5 TO 3 M FROM 21N TO 14N BETWEEN 174W AND 165W...AND FROM
24N TO 11N BETWEEN 157W AND 144W.
.24 HOUR FORECAST SEAS 2.5 TO 3 M FROM 19N TO 16N BETWEEN 178W
AND 173W...AND FROM 19N TO 09N BETWEEN 162W AND 148W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M FROM 17N TO 09N BETWEEN 168W
AND 154W.

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

.MONSOON TROUGH FROM 07N180E TO FIRST LOW NEAR 14N173W TO SECOND
LOW NEAR 04N152W TO 08N140W. ISOLATED MODERATE TSTMS WITHIN 210 NM
OF MONSOON TROUGH.

.ISOLATED MODERATE TSTMS FROM 12N TO 07N BETWEEN 147W AND 159W.

$$

.FORECASTER FOSTER. HONOLULU HI.