The High Seas Forecast for the Central North Pacific

High Seas Forecast Issued: 10/13/2026 08:14:29 AM UTC
                        
038
FZPN40 PHFO 122214
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC MON OCT 12 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 12 2026.
24 HOUR FORECAST VALID 1800 UTC OCT 13 2026.
48 HOUR FORECAST VALID 1800 UTC OCT 14 2026.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 26N165W 1015 MB. TROUGH FROM 30N162W TO LOW TO 23N168W.
LOW AND TROUGH NEARLY STATIONARY.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH MERGED WITH FRONT
DESCRIBED BELOW.

.FRONT 30N163W 28N167W 27N170W MOVING E 10 KT E OF 166W AND
NEARLY STATIONARY ELSEWHERE. SEAS 2.5 TO 3.5 M NW OF LINE 30N157W
21N180W.
.24 HOUR FORECAST FRONT 30N158W 29N164W THENCE TROUGH 24N170W.
SEAS LOWERED TO 2.5 M OR LOWER.
.48 HOUR FORECAST FRONT 30N155W 27N158W THENCE TROUGH 22N163W.

.LOW NEAR 07N159W EMBEDDED IN MONSOON TROUGH MOVING W SLOWLY. SEE
MONSOON TROUGH SECTION FOR TSTMS.
.24 HOUR FORECAST LOW NEAR 07N162W 1011 MB EMBEDDED IN MONSOON
TROUGH.
.48 HOUR FORECAST LOW NEAR 06N166W 1010 MB EMBEDDED IN MONSOON
TROUGH.

.TROUGH 27N148W 23N145W 21N140W MOVING WSW SLOWLY.
.24 HOUR FORECAST TROUGH 23N147W 20N140W.
.48 HOUR FORECAST TROUGH 23N148W 20N144W 17N140W. SEAS 2.5 TO 3 M
FROM 25N TO 17N E OF 143W.

.TROUGH 24N155W 19N152W 14N152W MOVING W SLOWLY.
.24 HOUR FORECAST TROUGH 18N157W 13N156W.
.48 HOUR FORECAST TROUGH 19N161W 11N159W.

.TROUGH 24N161W 20N164W 18N170W 13N174W MOVING W 10 KT S OF 20N
AND NEARLY STATIONARY ELSEWHERE. SCATTERED MODERATE TSTMS FROM 14N
TO 09N W OF 173W.
.24 HOUR FORECAST TROUGH 18N172W 13N180W.
.48 HOUR FORECAST TROUGH MOVED W OF AREA.

.SEAS 2.5 TO 3 M N OF 24N W OF 144W.
.24 HOUR FORECAST SEAS LOWERED TO 2.5 M OR LOWER.
.48 HOUR FORECAST SEAS 2.5 TO 3 M N OF 26N BETWEEN 175W AND 163W.

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

.MONSOON TROUGH 07N140W 07N143W 06N147W 08N158W 06N163W...AND
09N173W 08N180W. ISOLATED MODERATE TSTMS WITHIN 300 NM N OF
MONSOON TROUGH.

.SCATTERED MODERATE TSTMS WITHIN 120 NM OF A LINE FROM 15N172W TO
09N180W. ISOLATED MODERATE TSTMS S OF 05N BETWEEN 172W AND 154W.

$$

.FORECASTER TROTTER. HONOLULU HI.