FZPN40 PHFO 181005
HSFNP 

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 UTC MON MAY 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 MAY 18 2026.
24 HOUR FORECAST VALID 0600 UTC MAY 19 2026.
48 HOUR FORECAST VALID 0600 UTC MAY 20 2026.

.WARNINGS.


.NONE.
   
.SYNOPSIS AND FORECAST.

.TROUGH 30N176W 29N180W NEARLY STATIONARY. 
.24 HOUR FORECAST TROUGH MOVED N OF AREA.

.TROUGH 30N171W 27N172W 24N173W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH 30N170W 27N172W 22N172W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.WINDS 20 TO 25 KT FROM 07N TO 13N E OF 156W.
.24 HOUR FORECAST WINDS 20 TO 25 KT N OF 07N E OF 151W.
.48 HOUR FORECAST WINDS 20 TO 25 KT N OF 11N E OF 158W.

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

.SEAS 2.5 TO 3.5 M FROM 06N TO 20N E OF 160W.
.24 HOUR FORECAST SEAS 2.5 TO 3.5 M FROM 05N TO 19N E OF 
162W...AND FROM 19N TO 29N E OF 152W.
.48 HOUR FORECAST SEAS 2.5 TO 3.5 M IN AREA BOUNDED BY 30N153W 
30N140W 05N140W 08N173W 30N153W.

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

.ITCZ 08N140W 07N154W 04N162W...AND 09N173W 07N180W. SCATTERED
MODERATE TSTMS WITHIN 120 NM PRIMARILY N OF ITCZ E OF 162W. 
ISOLATED MODERATE TSTMS ELSEWHERE S OF ITCZ E OF 160W...AND W OF
173W.


$$

.FORECASTER TSAMOUS. HONOLULU HI.