491
FZPN40 PHFO 101517
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC SUN AUG 10 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC AUG 10 2025.
24 HOUR FORECAST VALID 1200 UTC AUG 11 2025.
48 HOUR FORECAST VALID 1200 UTC AUG 12 2025.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM HENRIETTE NEAR 24.7N 151.5W 1000 MB AT 1500 UTC
AUG 10 MOVING NW OR 315 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 50
KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM S
SEMICIRCLE...60 NM NE QUADRANT AND 40 NM NW QUADRANT. SEAS 4 M
OR GREATER WITHIN 100 NM NE QUADRANT...90 NM SE QUADRANT...30 NM
SW QUADRANT...45 NM NW QUADRANT WITH SEAS TO 5 M. ISOLATED
MODERATE TSTMS WITHIN 210 NM N SEMICIRCLE.
.24 HOUR FORECAST HURRICANE HENRIETTE NEAR 28.2N 155.6W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS
WITHIN 50 NM NW AND SE QUADRANTS...70 NM NE QUADRANT AND 30 NM
SW QUADRANT. SEAS 4 M OR GREATER WITHIN 130 NM NE QUADRANT...80
NM SE QUADRANT...40 NM SW QUADRANT...60 NM NW QUADRANT WITH
SEAS TO 6.5 M.
.48 HOUR FORECAST HURRICANE HENRIETTE MOVED N OF AREA.

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.

.FRONT 30N170W 29N179W 20N170E MOVING S 10 KT. ISOLATED MODERATE
TSTMS WITHIN 210 NM S OF FRONT.
.24 HOUR FORECAST NEW LOW 28N172W 1010 MB. FRONT WEAKENED TO TROUGH
FROM 30N170W TO LOW TO 27N175E.
.48 HOUR FORECAST LOW 26N176W 1010 MB. TROUGH FROM 30N171W TO LOW
TO 25N173E.

.TROUGH 13N169E 07N163E MOVING W 10 KT. ISOLATED MODERATE TSTMS
WITHIN 270 NM OF TROUGH.
.24 HOUR FORECAST TROUGH DISSIPATED.

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

.SEAS 2.5 M OR LOWER REMAINDER OF FORECAST AREA.

.MONSOON TROUGH 07N140W 07N147W. ISOLATED MODERATE TSTMS
WITHIN 210 NM OF TROUGH.

.ITCZ 13N149W 10N166W. SCATTERED MODERATE TO STRONG TSTMS
WITHIN 270 NM OF ITCZ W OF 155W. ISOLATED MODERATE TSTMS ELSEWHERE
WITHIN 140 NM OF ITCZ.

.SCATTERED MODERATE TSTMS S OF 08N BETWEEN 173E AND 167E.

$$

.FORECASTER THOMAS. HONOLULU HI.