123
FZPN40 PHFO 210332
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC SAT SEP 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 21 2024.
24 HOUR FORECAST VALID 0000 UTC SEP 22 2024.
48 HOUR FORECAST VALID 0000 UTC SEP 23 2024.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N147W 26N146W MOVING W SLOWLY. ISOLATED MODERATE
TSTMS WITHIN 120 NM W OF TROUGH AND WITHIN 180 NM E OF TROUGH.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 26N178W 22N176W MOVING W 10 KT. ISOLATED MODERATE
TSTMS WITHIN 150 NM E OF TROUGH.
.24 HOUR FORECAST TROUGH TROUGH DISSIPATED.

.TROUGH 17N174W 13N177E 10N167E MOVING NW 10 KT. SCATTERED
MODERATE TO STRONG TSTMS WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 18N177W 15N175E 11N172E 10N169E.
.48 HOUR FORECAST TROUGH 18N176E 13N171E 08N169E.

.TROUGH 12N161E 11N160E MOVING NW SLOWLY.
.24 HOUR FORECAST TROUGH 16N161E 13N160E.
.48 HOUR FORECAST TROUGH MOVED W OF AREA.

.LOW NEAR 07N157W 1009 MB MOVING W 10 KT. TROUGHS FROM 13N161W
TO LOW AND FROM LOW TO 07N155W. ISOLATED MODERATE TSTMS WITHIN
150 NM OF LOW.
.24 HOUR FORECAST LOW NEAR 07N161W 1010 MB. TROUGHS FROM 11N156W
TO LOW AND FROM LOW TO 06N174W.
.48 HOUR FORECAST LOW DISSIPATED. TROUGH 13N158W 08N169W.

.24 HOUR FORECAST NEW LOW NEAR 10N141W 1008 MB. WINDS 20 TO 25
KT WITHIN 150 NM OF LOW. SEAS 8 TO 9 FT FROM 13N TO 10N E OF
142W.
.48 HOUR FORECAST LOW NEAR 12N143W 1006 MB. WINDS 20 TO 25
KT FROM 16N TO 12N E OF 145W. SEAS 8 TO 9 FT FROM 15N TO 12N
BETWEEN 144W AND 141W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ITCZ 09N140W 10N154W. ISOLATED MODERATE TO STRONG TSTMS WITHIN
180 NM OF ITCZ.

.OTHERWISE ISOLATED MODERATE TSTMS N OF 27N BETWEEN 163W AND
156W...AND FROM 19N TO 17N BETWEEN 168E AND 175E.

$$

.FORECASTER TROTTER. HONOLULU HI.