The High Seas Forecast for the Central North Pacific

High Seas Forecast Issued: 11/19/2025 08:54:06 AM UTC
                        
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FZPN40 PHFO 182254
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC TUE NOV 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC NOV 18 2025.
24 HOUR FORECAST VALID 1800 UTC NOV 19 2025.
48 HOUR FORECAST VALID 1800 UTC NOV 20 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT 30N156W 26N159W 24N163W 23N171W MOVING NE 25 KT N OF 27N
AND NEARLY STATIONARY ELSEWHERE. WINDS 20 TO 30 KT N OF LINE
30N169E 22N175E 23N164W 30N157W.
.24 HOUR FORECAST FRONT N OF 27N MOVED N OF AREA AND FRONT
WEAKENED TO TROUGH ELSEWHERE. TROUGH 27N163W 23N170W 17N175W.
WINDS 20 TO 25 KT N OF LINE 30N167W 24N172E 16N174E 17N171W
30N152W.
.48 HOUR FORECAST TROUGH 21N174E 14N174E. WINDS 20 TO 25 KT FROM
25N TO 11N W OF 179W.

.TROUGH 28N153W 21N156W MOVING NW SLOWLY.
.24 HOUR FORECAST TROUGH MERGED WITH TROUGH DESCRIBED ABOVE.

.FRONT 30N161W 26N166W MOVING NE 25 KT. WINDS 20 TO 30 KT WITHIN
90 NM OF FRONT.
.24 HOUR FORECAST FRONT MOVED N OF AREA.

.TROUGH 18N152W 11N156W MOVING W 10 KT. WINDS 20 TO 25 KT WITHIN
150 NM W OF TROUGH. ISOLATED MODERATE TSTMS FROM 14N TO 11N
BETWEEN 158W AND 152W.
.24 HOUR FORECAST TROUGH 18N159W 11N161W. WINDS 20 TO 25 KT FROM
19N TO 14N BETWEEN 160W AND 152W.
.48 HOUR FORECAST TROUGH 21N163W 12N168W. WINDS EASED TO 20 KT OR
LESS.

.TROUGH 25N163E 24N160E NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH DISSIPATED.

.24 HOUR FORECAST NEW FRONT 30N169E 25N160E.
.48 HOUR FORECAST FRONT 30N176E 27N170E 25N160E. WINDS 20 TO 25
KT N OF FRONT.

.48 HOUR FORECAST WINDS 20 TO 25 KT FROM 25N TO 07N E OF 162W.

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

.SEAS 2.5 TO 4.5 M N OF LINE 30N159W 25N164W 22N171W 09N176E
12N160E.
.24 HOUR FORECAST SEAS 2.5 TO 4.5 M N OF LINE 30N151W 10N178W
08N160E 20N160E 30N175E. SEAS 2.5 TO 3 M FROM 18N TO 09N E OF
163W.
.48 HOUR FORECAST SEAS 2.5 TO 4 M N OF 08N EXCEPT N OF 27N
BETWEEN 179W AND 170W.

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

.ITCZ 08N140W 09N155W 07N170W 08N179E 06N160E. ISOLATED MODERATE
TSTMS WITHIN 210 NM OF ITCZ.

.SCATTERED MODERATE TSTMS FROM 14N TO 11N W OF 166E.

$$

.FORECASTER TROTTER. HONOLULU HI.