FZPN40 PHFO 191503
HSFNP 

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC TUE MAY 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC MAY 19 2026.
24 HOUR FORECAST VALID 1200 UTC MAY 20 2026.
48 HOUR FORECAST VALID 1200 UTC MAY 21 2026.

.WARNINGS.


.NONE.
   
.SYNOPSIS AND FORECAST.

.TROUGH 30N171W 26N172W 22N172W 19N172W MOVING E SLOWLY. 
.24 HOUR FORECAST TROUGH 30N169W 26N175W 21N177W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.WINDS 20 TO 25 KT N OF 11N E OF 152W.
.24 HOUR FORECAST WINDS 20 TO 25 KT FROM 10N TO 20N E OF 173W.
.48 HOUR FORECAST WINDS 20 TO 25 KT N OF 10N BETWEEN 144W AND 
167W.

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

.SEAS 2.5 TO 3.5 M IN AREA BOUNDED BY 30N150W 30N140W 02N140W 
10N170W 30N150W.
.24 HOUR FORECAST SEAS 2.5 TO 3.5 M IN AREA BOUNDED BY 30N152W 
30N140W 05N140W 10N175W 30N152W.
.48 HOUR FORECAST SEAS 2.5 TO 4 M IN AREA BOUNDED BY 30N150W 
30N140W 05N140W 08N180W 15N180W 30N150W.

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

.ITCZ 06N140W 05N164W 04N173W 04N180W. ISOLATED MODERATE 
TSTMS WITHIN 210 NM OF ITCZ.


.ISOLATED MODERATE TSTMS FROM 11N TO 13N BETWEEN 156W AND 161W.


$$


.FORECASTER TSAMOUS. HONOLULU HI.