FZPN40 PHFO 201015
HSFNP 

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

.WARNINGS.

.NONE.
   
.SYNOPSIS AND FORECAST.

.TROUGH 30N170W 28N173W 19N175W MOVING NW 10 KT.
.24 HOUR FORECAST WEAK TROUGH 30N173W 27N177W 21N179W.
.48 HOUR FORECAST TROUGH 30N179W 29N180W.

.WINDS 20 TO 25 KT E OF LINE 29N149W 21N159W 11N168W.
.24 HOUR FORECAST WINDS 20 TO 25 KT IN AREA BOUNDED BY 23N162W 
30N147W 30N141W 17N142W 09N140W 10N180W 17N160W 23N162W.
.48 HOUR FORECAST WINDS 20 TO 25 KT IN AREA BOUNDED BY 25N167W 
30N147W 30N140W 20N147W 10N155W 10N180W 14N180W 16N163W 25N167W.

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

.SEAS 2.5 TO 3.5 M N OF 11N E OF 153W. SEAS 2.5 TO 3 M FROM 14N TO
10N BETWEEN 167W AND 158W.
.24 HOUR FORECAST SEAS 2.5 TO 3.5 M E OF LINE 27N154W 16N163W 
09N175W. 
.48 HOUR FORECAST SEAS 2.5 TO 3.5 M IN AREA BOUNDED BY 24N166W 
29N148W 28N147W 14N141W 06N153W 09N180W 14N180W 24N166W 

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

.ITCZ 04N140W 03N150W 04N165W 06N180W. ISOLATED MODERATE TSTMS 
WITHIN 180 NM OF ITCZ W OF 158W. 

$$

.FORECASTER PIERCE. HONOLULU HI.