The High Seas Forecast for the Central North Pacific

High Seas Forecast   Issued: 10/10/2026 08:23:14 AM UTC

                        
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FZPN40 PHFO 092223
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC FRI OCT 09 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 OCT 09 2026.
24 HOUR FORECAST VALID 1800 UTC OCT 10 2026.
48 HOUR FORECAST VALID 1800 UTC OCT 11 2026.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 30N170W 1006 MB. TROUGH FROM LOW TO 25N168W TO 19N170W.
LOW MOVING SE SLOWLY AND TROUGH NEARLY STATIONARY. WINDS 20 TO 30
KT N OF 25N BETWEEN 176W AND 170W. SCATTERED MODERATE TSTMS N OF
25N BETWEEN 171W AND 165W. ASSOCIATED SEAS DESCRIBED BELOW.
.24 HOUR FORECAST LOW NEAR 28N168W 1008 MB. TROUGH FROM 30N168W
TO LOW TO 21N169W. WINDS 20 TO 25 KT N OF 25N BETWEEN 172W AND
161W.
.48 HOUR FORECAST LOW NEAR 29N166W 1013 MB. TROUGH FROM 30N166W
TO LOW TO 22N168W. WINDS EASED TO 20 KT OR LESS.

.LOW NEAR 09N147W 1011 MB. TROUGH FROM 14N150W TO LOW TO 04N148W.
LOW AND TROUGH MOVING W SLOWLY. WINDS 20 TO 25 KT FROM 15N TO 12N
BETWEEN 149W AND 143W. ISOLATED MODERATE TSTMS FROM 13N TO 09N
BETWEEN 151W AND 141W.
.24 HOUR FORECAST LOW NEAR 07N151W 1011 MB. TROUGH FROM 12N152W
TO LOW TO 03N150W. WINDS EASED TO 20 KT OR LESS.
.48 HOUR FORECAST LOW NEAR 07N153W 1012 MB. TROUGH FROM 15N151W
TO 14N152W TO LOW.

.LOW 08N165W 1008 MB NEARLY STATIONARY. WINDS 20 TO 25 KT AND
SEAS 2.5 TO 3 M S OF 06N BETWEEN 172W AND 162W. SEE TSTMS IN
MONSOON TROUGH SECTION.
.24 HOUR FORECAST LOW NEAR 08N166W 1011 MB. WINDS EASED TO 20 KT
OR LESS AND SEAS LOWERED TO 2.5 M OR LOWER.
.48 HOUR FORECAST LOW NEAR 08N169W 1011 MB.

.FRONT 30N160W 28N160W THENCE TROUGH 25N163W 22N165W NEARLY
STATIONARY. ISOLATED MODERATE TSTMS WITHIN 60 NM OF TROUGH.
ASSOCIATED SEAS DESCRIBED BELOW.
.24 HOUR FORECAST TROUGH DISSIPATED AND WINDS EASED TO 20 KT OR
LESS.

.TROUGH 30N156W 24N157W 22N156W MOVING NW SLOWLY. WINDS 20 TO 25
KT N OF 24N BETWEEN 158W AND 153W. ASSOCIATED SEAS DESCRIBED
BELOW.
.24 HOUR FORECAST TROUGH 30N159W 24N160W 22N161W. WINDS 20 TO 25
KT N OF 26N BETWEEN 161W AND 157W.
.48 HOUR FORECAST TROUGH 30N161W 20N163W 15N170W. WINDS EASED TO
20 KT OR LESS.

.SEAS 4 TO 5 M N OF 27N BETWEEN 169W AND 174W. SEAS 2.5 TO 4 M
ELSEWHERE N OF LINE 30N153W 25N152W 21N163W 17N180W.
.24 HOUR FORECAST SEAS 2.5 TO 3.5 M N OF LINE 30N154W 26N156W
25N164W 17N180W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M N OF 27N W OF 170W.

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

.MONSOON TROUGH 09N140W 10N142W...AND 08N160W TO 08N171W TO 10N180W.
SCATTERED MODERATE TSTMS FROM 12N TO 01N BETWEEN 170W AND 159W.

.ISOLATED MODERATE TSTMS S OF 06N W OF 175W.

$$

.FORECASTER TROTTER. HONOLULU HI.