643
FZPN40 PHFO 092247
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC SAT AUG 09 2025

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 160E

SYNOPSIS VALID 1800 UTC AUG 09 2025.
24 HOUR FORECAST VALID 1800 UTC AUG 10 2025.
48 HOUR FORECAST VALID 1800 UTC AUG 11 2025.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM HENRIETTE NEAR 22.3N 148.1W 1008 MB AT 2100 UTC
AUG 09 MOVING WNW OR 300 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS
35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM OF
CENTER EXCEPT 40 NM NE QUADRANT. SEAS 4 M OR GREATER WITHIN
60 NM OF N SEMICIRCLE.
.24 HOUR FORECAST TROPICAL STORM HENRIETTE NEAR 25.1N 151.9W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE
WINDS WITHIN 60 NM NE QUADRANT...30 NM SE QUADRANT...0 NM SW
QUADRANT...AND 40 NM NW QUADRANT. SEAS 12 FT OR GREATER
WITHIN 70 NM OF N SEMICIRCLE WITH SEAS TO 5 M.
.48 HOUR FORECAST TROPICAL STORM HENRIETTE NEAR 29.3N 156.9W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE
WINDS WITHIN 50 NM NW AND SE QUADRANTS...60 NM NE QUADRANT AND
30 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 90 NM OF NE
SEMICIRCLE WITH SEAS TO 6 M.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.

SEE LATEST BULLETIN FROM CPHC UNDER WMO HEADER WTPA23 PHFO FOR
ADDITIONAL DETAILS.

.SYNOPSIS AND FORECAST.

.24 HOUR FORECAST NEW FRONT 30N170W 28N175W THENCE TROUGH
28N175E.
.48 HOUR FORECAST FRONT 30N171W 26N175W 25N175E.

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

.SEAS 2.5 M OR LOWER REMAINDER OF FORECAST AREA.

.MONSOON TROUGH 10N140W 10N141W THENCE ITCZ 11N153W 08N160W
08N169W 09N173W 04N163E. SCATTERED MODERATE TO STRONG TSTMS
WITHIN 270 NM OF ITCZ W OF 162W. ISOLATED MODERATE TSTMS
ELSEWHERE WITHIN 140 NM OF ITCZ.

$$

.FORECASTER PECHACEK. HONOLULU HI.