195
FZPN40 PHFO 020345
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 02 2025.
24 HOUR FORECAST VALID 0000 UTC AUG 03 2025.
48 HOUR FORECAST VALID 0000 UTC AUG 04 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROPICAL DEPRESSION IONA NEAR 15.5N 178.8W 1008 MB AT 0000 UTC
AUG 02 MOVING WNW OR 295 DEG AT 15 KT. MAXIMUM SUSTAINED WINDS 30
KT GUSTS 40 KT. WINDS 20 TO 30 KT FROM 21N TO 14N BETWEEN 178E AND
176W. SEAS 4 M OR GREATER 180 NM NE QUADRANT...80 NM SE
QUADRANT...40 NM SW QUADRANT...AND 100 NM NW QUADRANT. SEAS 2.5 TO
4 M ELSEWHERE FROM 22N TO 12N BETWEEN 178E AND 172W.
.24 HOUR FORECAST TROPICAL DEPRESSION IONA NEAR 18.0N 175.8E.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WINDS 20 TO 30 KT FROM
22N TO 17N BETWEEN 174E AND 179E. SEAS 2.5 TO 4 M FROM 25N TO 16N
BETWEEN 175E AND 175W.
.48 HOUR FORECAST TROPICAL DEPRESSION IONA NEAR 20.6N 171.6E
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WINDS 20 TO 30 KT FROM
24N TO 20N BETWEEN 171E AND 175E. SEAS 2.5 TO 4 M FROM 26N TO 20N
BETWEEN 171E 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 30N168E 28N167E 30N162E NEARLY STATIONARY. WINDS 20 TO 25
KT WITHIN 180 NM E OF FRONT. SEAS 2.5 TO 3 M N OF 27N 162E AND
174E. ISOLATED MODERATE TSTMS N OF 24N W OF 169E.
.24 HOUR FORECAST FRONT 30N170E 24N160E. WINDS 20 TO 25 KT N OF
26N BETWEEN 169E AND 172E. SEAS LOWERED TO 2.5 M OR LOWER.
.48 HOUR FORECAST FRONT WEAKENED TO TROUGH 30N168E 25N164E
23N160E. WINDS EASED TO 20 KT OR LESS.

.TROUGH 13N156W 06N157W MOVING W SLOWLY. WINDS 20 TO 25 KT FROM
19N TO 12N BETWEEN 160W AND 155W. SEAS 2.5 TO 3.5 M FROM 18N TO
10N BETWEEN 163W AND 144W. ISOLATED MODERATE TSTMS FROM 13N TO 09N
BETWEEN 158W AND 154W.
.24 HOUR FORECAST TROUGH 11N160W 04N165W. WINDS 20 TO 25 KT FROM
17N TO 10N BETWEEN 169W AND 157W. SEAS 2.5 TO 3 M FROM 18N TO 11N
BETWEEN 168W AND 152W.
.48 HOUR FORECAST TROUGH 11N168W 04N175W. SEAS 2.5 TO 3 M FROM
19N TO 10N BETWEEN 174W AND 152W. WINDS EASED TO 20 KT OR LESS.

.24 HOUR FORECAST NEW TROUGH 11N164E 07N160E. .48 HOUR FORECAST
TROUGH MOVED W OF AREA.

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

.48 HOUR FORECAST SEAS 2.5 TO 4 M FROM 26N TO 13N E OF 145W.

.SEAS 2.5 M OR LOWER REMAINDER OF FORECAST AREA.

.ITCZ 07N140W 08N152W...AND 07N162W 05N172W 07N178E 06N160E. ISOLATED
MODERATE TSTMS WITHIN 210 NM OF ITCZ W OF 179E AND BETWEEN 165W
AND 161W.

.SCATTERED MODERATE TSTMS FROM 22N TO 12N BETWEEN 177E AND 172W.

$$

.FORECASTER TROTTER. HONOLULU HI.