199
FZPN40 PHFO 021108
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC AUG 02 2025.
24 HOUR FORECAST VALID 0600 UTC AUG 03 2025.
48 HOUR FORECAST VALID 0600 UTC AUG 04 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW FORMER TROPICAL DEPRESSION IONA NEAR 16N180W 1008 MB MOVING
W 15 KT. WINDS 20 TO 30 KT FROM 14N TO 22N BETWEEN 177E AND 177W. 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. SCATTERED MODERATE TSTMS WITHIN 90
NM OF LOW. ISOLATED MODERATE TSTMS ELSEWHERE FROM 14N TO 22N
BETWEEN 177E AND 174W.
.24 HOUR FORECAST LOW 18N175E 1009 MB. WINDS 20 TO 30 KT FROM 17N
TO 23N 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 30 KT FROM 21N
TO 27N BETWEEN 172E 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 24N165E NEARLY STATIONARY. WINDS 20 TO 25 KT
WITHIN 180 NM E OF FRONT. SEAS 2.5 TO 3 M WITHIN 90 NM E OF FRONT.
ISOLATED MODERATE TSTMS FROM 24N TO 26N BETWEEN 164E AND 167E.
.24 HOUR FORECAST FRONT WEAKENED TO TROUGH 30N170E 25N162E. WINDS
20 TO 25 WITHIN 180 NM E OF TROUGH. SEAS LOWERED TO 2.5 M OR LOWER.
.48 HOUR FORECAST TROUGH 30N165E 25N162E. WINDS EASED TO 20 KT OR
LESS.

.TROUGH 14N158W 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 160W AND 154W.
.24 HOUR FORECAST TROUGH 12N165W 08N165W. WINDS 20 TO 25 KT FROM 17N
TO 10N BETWEEN 169W AND 157W. SEAS 2.5 TO 3 M FROM 10N TO 18N BETWEEN
170W AND 150W.
.48 HOUR FORECAST TROUGH 13N170W 08N172W. SEAS 2.5 TO 3 M FROM 10N
TO 20N BETWEEN 174W AND 150W. WINDS EASED TO 20 KT OR LESS.

.TROUGH 09N167E 03N161E 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 07N153W...AND 07N162W 05N172W 08N172E 07N170E.

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

$$

.FORECASTER SHIGESATO. HONOLULU HI.