147
FZPN40 PHFO 121503
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC WED AUG 12 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 AUG 12 2026.
24 HOUR FORECAST VALID 1200 UTC AUG 13 2026.
48 HOUR FORECAST VALID 1200 UTC AUG 14 2026.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST

.LOW 15N141W 1004 MB MOVING W 10 KT. WINDS 20 TO 30 KT AND SEAS
2.5 TO 4 M FROM 08N TO 20N E OF 145W.
.24 HOUR FORECAST LOW 16N144W 1000 MB. WINDS 20 TO 30 KT FROM
10N TO 22N E OF 140W. SEAS 4 TO 5 M WITHIN 180 NM OF N SEMICIRCLE.
SEAS 2.5 TO 4 M ELSEWHERE FROM 10N TO 22N E OF 140W. POSSIBLE
TROPICAL CYCLONE.
.48 HOUR FORECAST LOW 16N147W 998 MB. WINDS 20 TO 30 KT FROM
15N TO 25N BETWEEN 153W AND 143W. SEAS 4 TO 5.5 M WITHIN 210 NM
OF LOW. SEAS 2.5 TO 4 M ELSEWHERE WITHIN 600 NM OF LOW. POSSIBLE
TROPICAL CYCLONE.

.TROUGH 18N177W 15N175W 11N175W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH MOVED W OF AREA.

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

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

.MONSOON TROUGH 06N180W 08N165W 07N155W 10N143W 14N140W. NUMEROUS
STRONG TSTMS WITHIN 240 NM OF LINE 06N148W 12N142W. SCATTERED
MODERATE TSTMS ELSEWHERE WITHIN 150 NM OF TROUGH E OF 165W.

$$

.FORECASTER PECHACEK. HONOLULU HI.