513
FZPN40 PHFO 200335
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC FRI SEP 20 2024

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

THE NATIONAL WEATHER SERVICE IS ACCEPTING PUBLIC COMMENTS UNTIL
OCTOBER 16 2024 ON A PROPOSAL TO REPLACE FEET WITH METERS WHEN
DESCRIBING SEAS IN A VARIETY OF NATIONAL MARINE CENTER TEXT AND
GRAPHICAL PRODUCTS FOR THE OFFSHORE AND HIGH SEAS AREAS ONLY.
TO LEARN MORE PLEASE VISIT
HTTPS://OCEAN.WEATHER.GOV/PROPOSED-METERS.PHP


SECURITE

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 0000 UTC SEP 20 2024.
24 HOUR FORECAST VALID 0000 UTC SEP 21 2024.
48 HOUR FORECAST VALID 0000 UTC SEP 22 2024.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N171W 26N173W MOVING W SLOWLY. ISOLATED MODERATE TSTMS
WITHIN 240 NM E OF TROUGH.
.24 HOUR FORECAST TROUGH 30N176W 26N177W.
.48 HOUR FORECAST TROUGH 30N177E 26N175E.

.TROUGH 23N170W 18N177W MOVING W SLOWLY. ISOLATED MODERATE TSTMS
WITHIN 120 NM E OF TROUGH.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 15N172W 09N178E 10N166E 07N160W MOVING NW SLOWLY.
ISOLATED MODERATE TO STRONG TSTMS WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 17N176W 11N173E 10N162E.
.48 HOUR FORECAST NEW LOW NEAR 14N176E 1010 MB. TROUGHS FROM
17N178E TO LOW AND FROM LOW TO 12N171E.

.48 HOUR FORECAST NEW TROUGH 15N165E 14N159E.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ITCZ 08N140W 09N148W 06N155W 09N140W 10N151W 06N157W. ISOLATED
MODERATE TSTMS WITHIN 210 NM OF ITCZ.

.OTHERWISE ISOLATED MODERATE TSTMS FROM FROM 16N TO 13N BETWEEN
164W AND 151W.

$$

.FORECASTER TROTTER. HONOLULU HI.