663
FZPN40 PHFO 202240
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC SEP 20 2024.
24 HOUR FORECAST VALID 1800 UTC SEP 21 2024.
48 HOUR FORECAST VALID 1800 UTC SEP 22 2024.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N146W 26N141W MOVING W SLOWLY.
.24 HOUR FORECAST TROUGH 30N150W 28N146W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 28N176W 23N176W MOVING NW 10 KT. ISOLATED MODERATE
TSTMS WITHIN 90 NM E OF TROUGH.
.24 HOUR FORECAST TROUGH 29N179E 25N177E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 17N176W 12N178E 08N169E MOVING NW 10 KT. WINDS 20 TO
30 KT WITHIN 120 NM E OF TROUGH. SCATTERED MODERATE TO STRONG
TSTMS WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 18N179E 11N173E.
.48 HOUR FORECAST TROUGH 18N177E 13N174E 10N172E.

.TROUGH 13N163E 10N160E MOVING NW SLOWLY.
.24 HOUR FORECAST TROUGH FROM 14N164E 13N160E.
.48 HOUR FORECAST TROUGH MOVED W OF AREA.

.LOW NEAR 08N156W 1011 MB MOVING W 10 KT.
.24 HOUR FORECAST LOW NEAR 07N160W. TROUGHS FROM 10N151W TO LOW
AND FROM LOW TO 04N163W.
.48 HOUR FORECAST LOW DISSIPATED.TROUGH 13N154W 10N165W 05N170W.

.48 HOUR FORECAST NEW LOW NEAR 11N142W 1010 MB. WINDS 20 TO 25
KT FROM 17N TO 13N E OF 144W.

.OTHERWISE WINDS 20 TO 25 KT FROM 18N TO 12N BETWEEN 158W AND
152W.
.24 HOUR FORECAST WINDS EASED TO 20 KT OR LESS.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ITCZ FROM 10N140W TO 10N148W TO 07N154W TO 06N162W. ISOLATED
MODERATE TO STRONG TSTMS WITHIN 180 NM EITHER SIDE OF
CONVERGENCE LINE.

.OTHERWISE ISOLATED MODERATE TSTMS FROM 15N TO 11N BETWEEN
158W AND 150W.

$$

.FORECASTER TROTTER. HONOLULU HI.