403
FZPN40 PHFO 200933
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC SEP 20 2024.
24 HOUR FORECAST VALID 0600 UTC SEP 21 2024.
48 HOUR FORECAST VALID 0600 UTC SEP 22 2024.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.48 HOUR FORECAST NEW LOW NEAR 10N140W 1011 MB.

.TROUGH FROM 05N160E TO 10N163E TO 14N167E MOVING WNW 15 KT.
WINDS E TO NE 20 TO 25 KT WITHIN 240 NM W OF TROUGH AXIS. ISOLATED
MODERATE TSTMS OVER FORECAST WATERS NW OF TROUGH AXIS.
.24 HOUR FORECAST TROUGH MERGED WITH TROUGH DESCRIBED IMMEDIATELY
BELOW. ASSOCIATED WINDS INCLUDED WITH TROUGH DESCRIBED
IMMEDIATELY BELOW.

.TROUGH FROM 09N172E TO 12N179W TO 18N173W MOVING NW 15 KT. WINDS
S TO SE 20 TO 25 KT AND SEAS 8 TO 9 FT WITHIN 180 NM SE OF TROUGH
AXIS. ISOLATED MODERATE TO STRONG TSTMS WITHIN 360 NM S AND SE OF
TROUGH AXIS...AND ALSO WITHIN 120 NM N AND NW OF TROUGH AXIS.
.24 HOUR FORECAST TROUGH FROM 11N160E TO 12N170E TO 17N179E TO
21N175W. WINDS S TO SE 20 TO 25 KT AND SEAS 8 TO 9 FT WITHIN 180
NM SE OF TROUGH AXIS.
.48 HOUR FORECAST TROUGH FROM 12N170E TO 19N179W. REMAINDER OF
TROUGH DISSIPATED. ASSOCIATED WINDS DIMINISHED TO 20 KT OR LESS.
ASSOCIATED SEAS SUBSIDED TO 8 FT OR LOWER.

.TROUGH FROM 21N175W TO 26N173W TO 30N173W MOVING W 15 KT.
ISOLATED MODERATE TSTMS WITHIN 90 NM E AND SE OF TROUGH AXIS.
.24 HOUR FORECAST TROUGH FROM 26N179W TO 30N178W.
.48 HOUR FORECAST TROUGH FROM 26N176E TO 30N177E.

.TROUGH FROM 28N140W TO 30N144W MOVING WSW 15 KT.
.24 HOUR FORECAST TROUGH FROM 26N146W TO 30N170W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.24 HOUR FORECAST NEW TROUGH FROM 06N162W TO 11N155W.
.48 HOUR FORECAST TROUGH FROM 06N166W TO 11N158W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ITCZ FROM 10N140W TO 10N149W TO 07N157W. ISOLATED MODERATE TO
STRONG TSTMS WITHIN 360 NM EITHER SIDE OF CONVERGENCE LINE.

$$

.FORECASTER BEDAL. HONOLULU HI.