485
FZPN40 PHFO 021509
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC SAT AUG 02 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 02 2025.
24 HOUR FORECAST VALID 1200 UTC AUG 03 2025.
48 HOUR FORECAST VALID 1200 UTC AUG 04 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW FORMER TROPICAL DEPRESSION IONA NEAR 16N178E 1008 MB MOVING
W 15 KT. WINDS 20 TO 30 KT FROM 15N TO 22N BETWEEN 176E AND 178W.
SEAS 3 TO 5 M WITHIN 210 NM OF LOW. SEAS 2.5 TO 3 M ELSEWHERE
FROM 14N TO 22N BETWEEN 177E AND 172W. NUMEROUS STRONG TSTMS WITHIN
120 NM OF LOW. SCATTERED MODERATE TSTMS ELSEWHERE FROM 17N TO 22N
BETWEEN 175E AND 176W. ISOLATED MODERATE TSTMS ELSEWHERE FROM 12N
TO 20N BETWEEN 180W AND 176W.
.24 HOUR FORECAST LOW 18N175E 1009 MB. WINDS 20 TO 30 KT FROM 17N TO
22N BETWEEN 174E AND 180W. SEAS 2.5 TO 4 M FROM 18N TO 25N BETWEEN
174E AND 180W.
.48 HOUR FORECAST LOW 20N170E 1009 MB. WINDS 20 TO 25 KT FROM 20N TO
23N BETWEEN 171E AND 175E. SEAS 2.5 TO 3M TO 22N TO 27N BETWEEN
172E AND 176E.

SEE BULLETIN TCMCP1 ISSUED BY CPHC FOR MORE INFORMATION

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

.FRONT 30N170E 25N164E NEARLY STATIONARY. WINDS 20 TO 25 KT WITHIN
120 NM E OF FRONT. SEAS 2.5 TO 3 M WITHIN 90 NM E OF FRONT. SCATTERED
MODERATE TSTMS FROM 23N TO 27N BETWEEN 162E AND 166E.
.24 HOUR FORECAST FRONT WEAKENED TO TROUGH 30N170E 24N163E. WINDS 20
TO 25 WITHIN 180 NM E OF TROUGH. SEAS LOWERED TO 2.5 M OR LOWER.
.48 HOUR FORECAST TROUGH 30N166E 25N163E. WINDS EASED TO 20 KT OR LESS.

.TROUGH 13N158W 10N160W 06N160W MOVING W SLOWLY. WINDS 20 TO 25 KT
FROM 10N TO 14N BETWEEN 162W AND 155W. SEAS 2.5 TO 3.5 M FROM 10N
TO 18N BETWEEN 165W AND 145W. ISOLATED MODERATE TSTMS FROM 08N TO
12N BETWEEN 164W AND 156W.
.24 HOUR FORECAST TROUGH 12N168W 08N169W. WINDS 20 TO 25 KT FROM 17N
TO 10N BETWEEN 170W AND 157W. SEAS 2.5 TO 3 M FROM 10N TO 18N BETWEEN
170W AND 150W.
.48 HOUR FORECAST TROUGH 13N173W 08N172W. SEAS 2.5 TO 3 M FROM 10N
TO 20N BETWEEN 174W AND 150W. WINDS EASED TO 20 KT OR LESS.

.TROUGH 09N163E 06N160E MOVING W 10 KT. WINDS 20 TO 25 KT WITHIN
90 NM OF TROUGH. ISOLATED MODERATE TSTMS WITHIN 150 NM OF TROUGH.
.24 HOUR FORECAST TROUGH MOVED W OF AREA.

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

.SEAS 2.5 TO 3 M FROM 10N TO 20N E OF 150W.
.24 HOUR FORECAST SEAS 2.5 TO 3 M FROM 12N TO 20N E OF 150W.
.48 HOUR FORECAST SEAS 2.5 TO 4 M FROM 12N TO 25N E OF 145W.

.SEAS 2.5 M OR LOWER REMAINDER OF FORECAST AREA.

.ITCZ 10N140W 07N151W...AND 08N162W 04N175W 08N172E 07N170E.
SCATTERED MODERATE TSTMS WITHIN 120 OF ITCZ E OF 151W.

.ISOLATED MODERATE TSTMS N OF 25N BETWEEN 180W AND 167W.

$$

.FORECASTER SHIGESATO. HONOLULU HI.