FZPN40 PHFO 200944
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 UTC MON APR 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC APR 20 2026.
24 HOUR FORECAST VALID 0600 UTC APR 21 2026.
48 HOUR FORECAST VALID 0600 UTC APR 22 2026.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 28N161W 1016 MB MOVING E 15 KT. FRONT FROM LOW TO
26N157W 26N154W 24N150W 24N142W 25N140W. FRONT MOVING S SLOWLY E
OF 150W AND NEARLY STATIONARY ELSEWHERE. TROUGH FROM LOW TO
25N166W NEARLY STATIONARY. E TO SE WINDS 20 TO 25 KT WITHIN 180 NM
N OF FRONT W OF 150W. SCATTERED TO NUMEROUS MODERATE TO STRONG
TSTMS WITHIN 180 NM S OF TROUGH...AND WITHIN 90 NM EITHER SIDE OF
FRONT W OF 157W.
.24 HOUR FORECAST LOW NEAR 28N154W 1014 MB. FRONT FROM LOW TO
24N152W 22N149W 21N144W 22N140W. TROUGH FROM LOW TO 27N160W. E TO
SE WINDS 20 TO 30 KT WITHIN 120 NM N OF TROUGH...LOW...AND FRONT
BETWEEN 157W AND 150W.
.48 HOUR FORECAST LOW NEAR 28N151W 1015 MB. FRONT FROM LOW TO
28N148W 27N146W. TROUGH FROM LOW TO 25N154W. E TO NE WINDS 20 TO
30 KT WITHIN 120 NM N OF TROUGH...LOW...AND FRONT BETWEEN 154W
AND 148W.

.TROUGH 29N168W 20N171W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH DISSIPATED.

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

.SEAS 2.5 TO 3 M N OF LINE 22N180W 30N173W...AND N OF 29N E OF
145W.
.24 HOUR FORECAST SEAS 2.5 TO 4 M N OF LINE 30N165W 24N140W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M N OF LINE 25N180W 30N177W...AND
N OF LINE 30N164W 19N150W 17N140W.

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

.ITCZ 04N140W 05N145W 04N147W 03N153W 02N157W. ISOLATED TO
SCATTERED MODERATE TSTMS WITHIN 120 NM EITHER SIDE OF ITCZ.

.SCATTERED MODERATE TSTMS FROM 05N TO 11N W OF 173W.

$$

.FORECASTER JELSEMA. HONOLULU HI.