438
FZPN40 PHFO 232235
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC MON SEP 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 23 2024.
24 HOUR FORECAST VALID 1800 UTC SEP 24 2024.
48 HOUR FORECAST VALID 1800 UTC SEP 25 2024.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 09N170W 1007 MB NEARLY STATIONARY. TROUGHS FROM LOW TO
11N166W TO 12N160W AND FROM LOW TO 07N174W TO 07N178W. WINDS 20 TO
30 KT AND SEAS 8 TO 9 FT WITHIN 240 NM S OF TROUGH AXIS W OF
166W. WINDS 20 TO 25 KT WITHIN 240 NM OF TROUGH AXIS E OF 174W.
NUMEROUS MODERATE TO STRONG TSMTS WITHIN 180 NM EITHER SIDE OF
TROUGH AXIS. ISOLATED MODERATE TSTMS ELSEWHERE WITHIN 360 NM
EITHER SIDE OF TROUGH AXIS.
.24 HOUR FORECAST LOW NEAR 09N170W 1009 MB. TROUGHS FROM LOW TO
13N168W TO 18N164W AND FROM LOW TO 10N178W TO 09N173E. WINDS 20 TO
30 KT SEAS 8 TO 11 FT WITHIN 240 NM EITHER SIDE OF TROUGH AXIS E
OF 174W.
.48 HOUR FORECAST LOW NEAR 15N170W. TROUGHS FROM LOW TO 18N164W
AND FROM LOW TO 10N178W TO 10N173E. WINDS 20 TO 25 KT WITHIN 240
NM EITHER SIDE OF TROUGH AXIS E OF 174W. SEAS 8 TO 11 FT WITHIN
240 NM N AND NW OF TROUGH AXIS.

.LOW NEAR 12N143W 1009 MB MOVING W 10 KT. TROUGH FROM LOW TO
09N147W TO 09N154W. WINDS 20 TO 25 KT WITHIN 180 NM OF LOW N
SEMICIRCLE. ISOLATED MODERATE TSTMS WITHIN 360 NM N OF TROUGH AXIS
E OF 147W AND WITHIN 240 NM S OF TROUGH AXIS BETWEEN 154W AND
143W.
.24 HOUR FORECAST LOW NEAR 12N147W 1009. TROUGHS FROM LOW TO
12N147W AND FROM LOW TO 09N154W. WINDS 20 TO 25 KT WITHIN 180 NM
OF LOW NE SEMICIRCLE.
.48 HOUR FORECAST DISSIPATING LOW NEAR 12N150W 1011 MB. TROUGH
FROM LOW TO 06N154W. WINDS DIMINISHED TO 20 KT OR LESS.

.TROUGH FROM 23N164E TO 26N165E TO 30N167E MOVING NW 15 KT.
ASSOCIATED WINDS INCLUDED BELOW. NUMEROUS MODERATE TSTMS FROM 30N
TO 26N BETWEEN TROUGH AND 173E. ISOLATED MODERATE TSTMS ELSEWHERE
WITHIN 480 NM E OF TROUGH AXIS AND WITHIN 240 NM W OF TROUGH AXIS.
.24 HOUR FORECAST TROUGH FROM 27N160E TO 30N162E.
.48 HOUR FORECAST TROUGH MOVED W OF FORECAST AREA.

.TROUGH FROM 23N160W TO 26N159W TO 29N157W MOVING NW 15 KT.
ISOLATED MODERATE TSTMS S OF 26N WITHIN 120 NM W OF TROUGH AXIS
.24 HOUR FORECAST TROUGH DISSIPATED.

.OTHERWISE WINDS NE TO SE 20 TO 25 KT WITHIN AN AREA BOUND BY
26N165E 26N170W 16N170W 16N178E 23N164E 26N165E.
.24 HOUR FORECAST WINDS NE TO E 20 TO 25 KT FROM 28N TO 22N
BETWEEN 178W AND 168W.
.48 HOUR FORECAST WINDS DIMINISHED TO 20 KT OR LESS...EXCEPT HIGHER
WHERE NOTED ABOVE.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.OTHERWISE SEAS 8 TO 9 FT OVER FORECAST WATERS NW OF A LINE FROM
30N163W TO 27N171W.
.24 HOUR FORECAST SEAS 8 TO 9 FT OVER FORECAST WATERS N OF A LINE
FROM 30N146W TO 24N154W TO 24N170W.
.48 HOUR FORECAST SEAS 8 TO 9 FT OVER FORECAST WATERS NW OF A
LINE FROM 25N137W TO 21N147W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.OTHERWISE NUMEROUS MODERATE TSTMS FROM 20N TO 14N BETWEEN 160E
AND 166E. ISOLATED MODERATE TSTMS ELSEWHERE FROM 22M TO 12N
BETWEEN 160E AND 174E.

$$

.FORECASTER BEDAL. HONOLULU HI.