High Seas Forecast
Issued by NWS

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FZPN40 PHFO 150336
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC WED OCT 15 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC OCT 15 2025.
24 HOUR FORECAST VALID 0000 UTC OCT 16 2025.
48 HOUR FORECAST VALID 0000 UTC OCT 17 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N153W 25N154W NEARLY STATIONARY. SCATTERED MODERATE TSTMS
WITHIN 150 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 30N155W 26N157W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 30N163W 26N165W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH 30N169W 26N171W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 30N167W 27N169W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH MERGED WITH TROUGH IN PARAGRAPH ABOVE.

.TROUGH 13N157W 08N162W MOVING W SLOWLY. ISOLATED MODERATE TSTMS
WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 13N160W 09N164W.
.48 HOUR FORECAST TROUGH ABSORBED INTO ITCZ.

.TROUGH 09N169E 05N160E MOVING W 10 KT. SCATTERED MODERATE TSTMS
FROM 02N TO 10N W OF 170E.
.24 HOUR FORECAST TROUGH 12N166E 09N160E.
.48 HOUR FORECAST TROUGH MOVED W OF AREA.

.24 HOUR FORECAST NEW FRONT 30N172E 27N166E.
.48 HOUR FORECAST FRONT WEAKENED TO TROUGH 30N179W 28N169E.

.WINDS 20 KT OR LESS OVER ENTIRE FORECAST AREA.

.SEAS 2.5 TO 3 M IN AREA BOUNDED BY 30N180W 30N165W 10N175W 16N160E
30N180W...AND N OF 28N W OF 162E.
.24 HOUR FORECAST SEAS 2.5 TO 3.5 M N OF LINE 30N172E 25N160E. SEAS
2.5 TO 3 M FROM 12N TO 20N BETWEEN 170W AND 179E...AND N OF 23N E OF
146W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M N OF 27N BETWEEN 180W AND 170E...
AND N OF LINE 14N140W 30N165W.

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

.ITCZ 11N140W 07N151W...AND FROM 10N163W 10N179W 09N171E. SCATTERED
MODERATE TSTMS FROM 03N TO 12N BETWEEN 180W AND 170E. ISOLATED
MODERATE TSTMS WITHIN 150 NM OF ITCZ BETWEEN 163W AND 180W.

SCATTERED MODERATE TSTMS FROM 17N TO 21N BETWEEN 177E AND 170E.

$$

.FORECASTER WROE/VAUGHAN. HONOLULU HI.