The High Seas Forecast for the Central North Pacific

High Seas Forecast Issued: 05/23/2025 01:17:35 AM UTC
                        
672
FZPN40 PHFO 221517
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC THU MAY 22 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 MAY 22 2025.
24 HOUR FORECAST VALID 1200 UTC MAY 23 2025.
48 HOUR FORECAST VALID 1200 UTC MAY 24 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 23N171E 1008 MB. TROUGH 13N170E 17N177E 27N176E 24N179W
29N175E TO LOW. LOW AND TROUGHS MOVING NW SLOWLY. SE WINDS 20 TO
30 KT N OF 23N BETWEEN 171W AND 175E. SCATTERED MODERATE TO STRONG
TSTMS WITHIN 240 NM OF TROUGH.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH 30N167E 24N167E 18N164E.
SE WINDS 20 TO 30 KT N OF 25N BETWEEN 179E AND 176E.
.48 HOUR FORECAST TROUGH 30N162E 26N161E 22N158E. WINDS EASED 20
KT OR LESS.

.TROUGH 30N167E 25N169E 22N173E. ISOLATED MODERATE TSTMS WITHIN
180 NM W OF TROUGH.
.24 HOUR FORECAST TROUGH ABSORBED BY TROUGH DESCRIBED ABOVE.
AREA.

.WINDS 20 KT OR LESS OVER ENTIRE FORECAST AREA.

.SEAS 2.5 TO 4 M N OF 23N BETWEEN 171W AND 174E.
.24 HOUR FORECAST SEAS 2.5 TO 4 M N OF 26N BETWEEN 179W AND 171E.
.48 HOUR FORECAST SEAS LOWERED TO 2.5 M OR LESS.

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

.ITCZ 09N140W 06N150W 05N157W 02N164W. SCATTERED MODERATE TSTMS
WITHIN 150 NM OF ITCZ.


$$

.FORECASTER PIERCE. HONOLULU HI.