621
FZPS40 PHFO 180310
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0530 UTC THU JUL 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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
JULY 29 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

SOUTH PACIFIC EQUATOR TO 25S BETWEEN 120W AND 160E

SYNOPSIS VALID 0000 UTC JUL 18 2024.
24 HOUR FORECAST VALID 0000 UTC JUL 19 2024.
48 HOUR FORECAST VALID 0000 UTC JUL 20 2024.

.WARNINGS.

...GALE WARNING...
.FRONT 25S164E 20S160E MOVING E 20 KT.
.12 HOUR FORECAST NEW LOW 18S164E 1009 MB. FRONT FROM LOW
TO 25S170E. LOW AND TROUGH MOVING SE 20 KT.
.24 HOUR FORECAST LOW MOVED S OF FORECAST AREA. FRONT FROM
LOW TO 18S168E THENCE TROUGH 10S160E. WINDS 30 TO 35 KT
WITHIN 240 NM OF LOW. WINDS 20 TO 30 KT ELSEWHERE S OF LINE
10S160E 25S175W.
.48 HOUR FORECAST FRONT 25S174W 16S175E THENCE TROUGH 10S160E.
WINDS 25 TO 35 KT S OF 22S BETWEEN 165E AND 180W. WINDS
20 TO 25 KT ELSEWHERE S OF 20S BETWEEN 165E AND 175W.

...GALE WARNING...
.24 HOUR FORECAST NEW FRONT 25S143W 21S150W MOVING E 20 KT.
WINDS 30 TO 35 KT S OF 22S BETWEEN 150W AND 135W. WINDS 20 TO
30 KT ELSEWHERE S OF 20S BETWEEN 160W AND 125W.
.48 HOUR FORECAST FRONT 25S132W 20S138W 16S147W. WINDS 30 TO
40 KT S OF 22S BETWEEN 145W AND 130W.

.SYNOPSIS AND FORECAST.

.TROUGH 25S1705W 10S160E NEARLY STATIONARY.
.24 HOUR FORECAST FRONT AND FRONT DISSIPATED.

.FRONT 25S134W 20S140W 16S146W THENCE TROUGH 12S161W. FRONT
AND TROUGH SLOWLY MOVING W.
.24 HOUR FORECAST FRONT WEAKENS TO TROUGH. TROUGH 25S133W
18S147W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 05S171E 05S168E 08S165E MOVING W SLOWLY.
.24 HOUR FORECAST TROUGH DISSIPATED.

.WINDS 20 TO 25 KT N OF 10S BETWEEN 180W AND 150W.
.24 HOUR FORECAST WINDS 20 TO 25 KT WITHIN 360 NM OF POINT
10S170W...AND FROM 15S TO 05S E OF 120W.
.48 HOUR FORECAST WINDS DIMINISHING TO LESS THAN 20 KT OVER
ENTIRE FORECAST AREA.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 TO 10 FT E OF LINE 05S130W 15S128W 20S120W...AND S OF
LINE 25S150W 20S140W 25S135W.
.24 HOUR FORECAST SEAS 8 TO 12 FT S OF 20S E OF 165W...AND S
OF 20S W OF 175E.
.48 HOUR FORECAST SEAS 12 TO 15 FT S OF LINE 25S140W 22S140W
25S132W...AND S OF 22S BETWEEN 175E AND 180W. SEAS 8 TO 12
FT ELSEWHERE S OF LINE 25S165E 18S172E 25S175W...AND E OF LINE
25S160W 18S150W 20S130W 10S130W 10S120W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.SCATTERED MODERATE TSTMS N OF 15S W OF 175E.



$$

.FORECASTER PECHACEK. HONOLULU HI.