571
FZPN40 PHFO 171533
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC JUL 17 2025.
24 HOUR FORECAST VALID 1200 UTC JUL 18 2025.
48 HOUR FORECAST VALID 1200 UTC JUL 19 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 29N170E 20N169E 16N170E NEARLY STATIONARY. ISOLATED
MODERATE TSTMS N OF 20N BETWEEN 167E AND 178E.
.24 HOUR FORECAST TROUGH 30N169E 26N165E 23N164E. WINDS 20 TO
25 KT N OF 25N W OF 166E.
.48 HOUR FORECAST TROUGH 30N161E 27N160E. WINDS 20 TO 25 KT
FROM 20N TO 28N W OF 164E.

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

.SEAS 2.5 TO 3.0 M FROM 18N TO 07N BETWEEN 178E AND 145W...AND
N OF 28N E OF 153W.
.24 HOUR FORECAST SEAS 2.5 TO 3.0 M FROM 17N TO 08N BETWEEN 172E
AND 156W...N OF 25N BETWEEN 155W AND 145W...AND N OF 25N W OF 163E.
.48 HOUR FORECAST SEAS 2.5 TO 3.0 M FROM 18N TO 09N BETWEEN 170E
AND 162W.

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

.ITCZ 10N140W 10N151W 08N162W 08N169W 06N178E 07N170E 07N161E
06N145E. ISOLATED MODERATE TSTMS WITHIN 210 NM OF ITCZ E OF 175W.

$$

.FORECASTER M BALLARD. HONOLULU HI.