818
FZPN40 PHFO 170256
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC THU JUL 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 JUL 17 2025.
24 HOUR FORECAST VALID 0000 UTC JUL 18 2025.
48 HOUR FORECAST VALID 0000 UTC JUL 19 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT 30N174E 25N168E NEARLY STATIONARY. ISOLATED MODERATE TSTMS
N OF 23N BETWEEN 167E AND 176W.
.24 HOUR FORECAST FRONT WEAKENED TO TROUGH 30N169E 26N166E
23N164E. WINDS 20 TO 25 KT N OF 24N W OF 166E.
.48 HOUR FORECAST TROUGH 30N161E 27N160E.

.TROUGH 23N177E 16N173E MOVING NW 10 KT. ISOLATED MODERATE TSTMS
WITHIN 210 NM E OF TROUGH N OF 17N.
.24 HOUR FORECAST TROUGH MERGES WITH TROUGH DESCRIBED IMMEDIATELY
ABOVE.

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

.SEAS 2.5 TO 3.0 M FROM 18N TO 07N BETWEEN 178W AND 148W...AND
N OF 28N E OF 148W.
.24 HOUR FORECAST SEAS 2.5 TO 3.0 M FROM 15N TO 07N BETWEEN 174E
AND 154W.
.48 HOUR FORECAST SEAS 2.5 TO 3.0 M FROM 17N TO 09N BETWEEN 173E
AND 160W.

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

.ITCZ 11N140W 08N173W 07N170E 07N160E. ISOLATED MODERATE TSTMS
WITHIN 240 NM OF ITCZ E OF 175W AND WITHIN 180 NM OF ITCZ W OF
175W.

.ISOLATED MODERATE TSTMS N OF 28N BETWEEN 175W AND 170W.

$$

.FORECASTER TROTTER/VAUGHAN. HONOLULU HI.