166
FZPN40 PHFO 201459
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC SEP 20 2026.
24 HOUR FORECAST VALID 1200 UTC SEP 21 2026.
48 HOUR FORECAST VALID 1200 UTC SEP 22 2026.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 14N143W 1007 MB MOVING W 10 KT. ISOLATED MODERATE TSTMS W OF
LOW WITHIN 50 NM OF 15N145W.
.24 HOUR FORECAST LOW 13N146W 1007 MB.
.48 HOUR FORECAST LOW 13N149W 1007 MB.

.LOW 12N160W 1010 MB NEARLY STATIONARY.
.24 HOUR FORECAST LOW 12N161W 1010 MB.
.48 HOUR FORECAST LOW ABSORBED BY MONSOON TROUGH.

.TROUGH 17N175W TO 22N174W TO 26N171W MOVING NW 10 KT.
.24 HOUR FORECAST TROUGH 18N180W TO 24N178W TO 30N173W.
.48 HOUR FORECAST TROUGH 27N180W TO 30N174W.

.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 19N BETWEEN 153W AND 158W.
.24 HOUR FORECAST WINDS 20 TO 25 KT FROM 15N TO 21N E OF 158W.
.48 HOUR FORECAST WINDS 20 TO 25 KT FROM 16N TO 23N E OF 153W.

.SEAS 2.5 TO 3 M FROM 14N TO 24N BETWEEN 141W AND 160W.
.24 HOUR FORECAST SEAS 2.5 TO 3 M FROM 14N TO 23N E OF 165W.
.48 HOUR FORECAST SEAS 2.5 TO 3.5 M FROM 14N TO 25N E OF 158W.

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

.MONSOON TROUGH 15N140W TO FIRST LOW MENTIONED ABOVE TO 13N150W
TO SECOND LOW DESCRIBED ABOVE TO 08N170W TO 08N180W. SCATTERED
MODERATE TO ISOLATED STRONG TSTMS WITHIN 100 NM OF TROUGH BETWEEN
150W AND 170W...AND S OF TROUGH FROM 00N TO 04N BETWEEN 167W AND
170W.

.ISOLATED MODERATE TSTMS FROM 03N TO 07N BETWEEN 143W AND 154W.

$$

.FORECASTER CHAN. HONOLULU HI.