840
FZPN40 PHFO 202019
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC SUN SEP 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 20 2026.
24 HOUR FORECAST VALID 1800 UTC SEP 21 2026.
48 HOUR FORECAST VALID 1800 UTC SEP 22 2026.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 13N143W 1009 MB MOVING W 10 KT.
.24 HOUR FORECAST LOW 13N146W 1007 MB.
.48 HOUR FORECAST LOW 13N149W 1007 MB.

.LOW 13N160W 1012 MB NEARLY STATIONARY.
.24 HOUR FORECAST LOW 12N162W 1010 MB.
.48 HOUR FORECAST LOW ABSORBED BY MONSOON TROUGH.

.24 HOUR FORECAST NEW TROUGH 24N180W TO 30N174W.
.48 HOUR FORECAST TROUGH 24N180W TO 30N173W.

.WINDS 20 TO 30 KT FROM 00N TO 03N W OF 177W. SEAS 2.5 TO 3 M
FROM 00N TO 04N W OF 177W.
.24 HOUR FORECAST WINDS EASED BELOW 20 KT AND SEAS BECAME LESS
THAN 2.5 M.

.WINDS 20 TO 25 KT FROM 16N TO 25N E OF 160W.
.24 HOUR FORECAST WINDS 20 TO 25 KT FROM 15N TO 25N E OF 162W.
.48 HOUR FORECAST WINDS 20 TO 30 KT FROM 16N TO 25N E OF 156W.

.SEAS 2.5 TO 3 M FROM 14N TO 22N E OF 160W.
.24 HOUR FORECAST SEAS 2.5 TO 3.5 M FROM 13N TO 23N E OF 165W.
.48 HOUR FORECAST SEAS 2.5 TO 3.5 M FROM 13N TO 25N E OF 158W.

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

.MONSOON TROUGH 12N140W 13N143W 11N150W 12N160W 08N166W 07N174W.
SCATTERED MODERATE TSTMS WITHIN 120 NM N OF MONSOON TROUGH...AND
450 NM S OF MONSOON TROUGH BETWEEN 156W AND 173W.

.ISOLATED MODERATE TSTMS S OF 07N W OF 173W.

$$

.FORECASTER FOSTER. HONOLULU HI.