The High Seas Forecast for the Central North Pacific

High Seas Forecast Issued: 04/19/2025 01:34:18 AM UTC
                        
300
FZPN40 PHFO 181534
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC FRI APR 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC APR 18 2025.
24 HOUR FORECAST VALID 1200 UTC APR 19 2025.
48 HOUR FORECAST VALID 1200 UTC APR 20 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N157W 25N161W 19N163W NEARLY STATIONARY. ISOLATED
MODERATE TSTMS N OF 19N BETWEEN 153W AND TROUGH.
.24 HOUR FORECAST TROUGH TROUGH DISSIPATED.

.NE TO E WINDS 20 TO 25 KT N OF LINE 30N158W 24N161W 17N176E
17N174E 24N171E 30N173W...AND FROM 13N TO 08N E OF 154W.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 26N TO 20N
BETWEEN 174W AND 172E...AND E OF LINE 16N140W 16N144W 05N165W
03N164W 07N140W.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 15N TO 05N E OF
160W.

.SEAS 12 TO 13 FT IN AREA BOUNDED BY 27N167W 27N165W 25N165W
22N172W 24N172W 27N167W. SEAS 8 TO 12 FT ELSEWHERE N OF LINE
30N147W 21N156W 14N177W 14N172E 22N160E 26N160E 30N164E...EXCEPT
N OF LINE 30N176W 28N173E 30N169E.
.24 HOUR FORECAST SEAS 8 TO 10 FT N OF LINE 30N159W 27N158W
24N164W 25N171W 13N178W 16N165E 21N164E 29N172E 27N177W 30N174W.
SEAS 8 TO 9 FT FROM 14N TO 05N E OF 168W.
.48 HOUR FORECAST SEAS 8 TO 10 FT E OF LINE 18N140W 18N149W
06N173W 05N140W. SEAS 8 TO 9 FT FROM 24N TO 20N BETWEEN 179W AND
170E.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS 8 FT OR LESS.

.ITCZ 04N140W 04N156W. SCATTERED MODERATE TSTMS 150 NM N OF ITCZ
BETWEEN 148W AND 154W.


$$

.FORECASTER PIERCE. HONOLULU HI.