FZPN40 PHFO 171010
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 UTC SUN MAY 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 17 2026.
24 HOUR FORECAST VALID 0600 UTC MAY 18 2026.
48 HOUR FORECAST VALID 0600 UTC MAY 19 2026.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT 30N173W 28N180W NEARLY STATIONARY.
.24 HOUR FORECAST FRONT MOVED N OF AREA.

.TROUGH 17N162W 12N161W MOVING NW 10 KT.
.24 HOUR FORECAST WEAK TROUGH 18N168W 13N166W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.WINDS 20 TO 30 KT FROM 20N TO 12N E OF 156W.
.24 HOUR FORECAST WINDS 20 TO 25 KT 15N TO 11N BETWEEN 160W AND
146W.
.48 HOUR FORECAST WINDS 20 TO 25 KT FROM 27N TO 19N E OF 147W.

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

.SEAS 2.5 TO 3.5 M FROM 26N TO 08N E OF 160W.
.24 HOUR FORECAST SEAS 2.5 TO 3.5 M FROM 20N TO 09N E OF 163W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M N OF 11N E OF 155W.

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

.ITCZ 06N140W 07N154W 05N163W 05N180W. ISOLATED MODERATE TO LOCALLY STRONG TSTMS
WITHIN 300 NM OF ITCZ E OF 156W. ISOLATED MODERATE TSTMS WITHIN 180 NM OF ITCZ W OF
168W.

.SCATTERED MODERATE TSTMS FROM 25N TO 21N BETWEEN 154W AND 150W.

$$

.FORECASTER PIERCE. HONOLULU HI.