479
FZPN40 PHFO 090324 CCA
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 09 2025.
24 HOUR FORECAST VALID 0000 UTC AUG 10 2025.
48 HOUR FORECAST VALID 0000 UTC AUG 11 2025.

.WARNINGS.

...TROPICAL STORM WARNING...
.POST-TROPICAL CYCLONE HENRIETTE NEAR 20.2N 144.6W 1009 MB AT
0300 UTC AUG 09 MOVING WNW OR 290 DEG AT 15 KT. MAXIMUM SUSTAINED
WINDS 30 KT GUSTS 40 KT. SEAS 4 M OR GREATER OVER FORECAST WATERS
WITHIN 90 NM N SEMICIRCLE...AND 60 NM ELSEWHERE. ELSEWHERE OVER
FORECAST WATERS WINDS 20 TO 33 KT AND SEAS 2.5 TO 4 M WITHIN 180
NM OF LOW.
.24 HOUR FORECAST POST-TROPICAL REMNANT LOW HENRIETTE
NEAR 25.8N 153.2W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
WINDS 20 TO 30 KT WITHIN 150 NM OF N SEMICIRCLE OF LOW. SEAS 2.5
TO 4 M WITHIN 180 NM OF N SEMICIRCLE OF LOW.
.48 HOUR FORECAST TROPICAL STORM HENRIETTE NEAR 25.8N 153.2W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE
WINDS WITHIN 60 NM NE QUADRANT...50 NM SE QUADRANT...30 NM SW
QUADRANT...AND 50 NM NW QUADRANT. WINDS 20 TO 30 KT ELSEWHERE
WITHIN 120 NM OF N SEMICIRCLE AND WITHIN 90 NM OF S SEMICIRCLE.
SEAS 4 M OR GREATER WITHIN 90 NM OF LOW.

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.

.TROUGH 30N165W 25N166W MOVING W SLOWLY. ISOLATED MODERATE TSTMS
WITHIN 90 NM OF POINT 28N163W.
.24 HOUR FORECAST TROUGH 30N166W 22N170W.
.48 HOUR FORECAST TROUGH 26N172W 20N176W.

.TROUGH 12N175W 05N175W MOVING W 10 KT. SCATTERED MODERATE TSTMS
WITHIN 270 NM OF POINT 05N175W.
.24 HOUR FORECAST TROUGH 09N178W 05N178W.
.48 HOUR FORECAST TROUGH 09N178E 05N178E.

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

.SEAS 2.5 M OR LOWER REMAINDER OF FORECAST AREA.

.ITCZ 10N145W 05N175W 03N165E 02N160E. ISOLATED MODERATE TSTMS
WITHIN 120 NM OF ITCZ BETWEEN 180W AND 170W.

.SCATTERED MODERATE TSTMS S OF 05N W OF 175E...AND N OF 25N
BETWEEN 175E AND 170E.

$$

.FORECASTER PECHACEK. HONOLULU HI.