High Seas Forecast
Issued by NWS

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FZPS40 PHFO 221523
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC FRI MAR 22 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

PLEASE SEE HTTPS://OCEAN.WEATHER.GOV/PROPOSED_HIGH_SEAS_TROPICAL.PHP
FOR A PROPOSAL...AND A REQUEST FOR COMMENTS...TO INCREASE
READABILITY OF THE HIGH SEAS FORECAST (WEB ADDRESS LOWERCASE).

SECURITE

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

SYNOPSIS VALID 1200 UTC MAR 22 2024.
24 HOUR FORECAST VALID 1200 UTC MAR 23 2024.
48 HOUR FORECAST VALID 1200 UTC MAR 24 2024.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 18S179E 1010 MB. SECOND LOW 21S173W 1011 MB. TROUGH FROM
15S160E TO 17S170E TO FIRST LOW TO SECOND LOW TO 25S161W. LOWS
AND TROUGHS MOVING SE 10 KT. WINDS 20 TO 25 KT S OF TROUGHS
AND LOWS. SCATTERED MODERATE TO STRONG TSTMS WITHIN 300 NM OF
BOTH LOWS. ISOLATED MODERATE TSTMS WITHIN 300 NM ELSEWHERE
EITHER SIDE OF TROUGH.
.24 HOUR FORECAST FIRST LOW 18S178W 1009 MB. SECOND LOW 23S169W
1010 MB. TROUGH 15S160E TO FIRST LOW TO SECOND LOW TO 23S165W. SE
WINDS 20 TO 25 KT S OF TROUGH W OF 175W.
.48 HOUR FORECAST FIRST LOW 19S178W 1009 MB. SECOND LOW
DISSIPATED. TROUGH 14S160E 15S170E TO LOW TO 23S170W. SE WINDS
20 TO 25 KT WITHIN 90 NM S OF LOW.

.LOW 17S140W 1011 MB. TROUGH 14S144W TO LOW TO 20S136W. LOW AND
TROUGH MOVING NW 10 KT. SCATTERED STRONG TSTMS WITHIN 180 NM
OF LOW AND TROUGH...AND WITHIN 180 NM OF POINT 13S136W.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH 25S140W 21S146W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.24 HOUR FORECAST NEW TROUGH 14S156W 15S145W 17S142W.
.48 HOUR FORECAST TROUGH 16S162W 16S153W 17S148W.

.OTHERWISE...WINDS 20 KT OR BELOW OVER REMINDER OF FORECAST AREA.

.SEAS 8 TO 10 FT S OF 18S BETWEEN 160W AND 170E.
.24 HOUR FORECAST SEAS SUBSIDING TO LESS THAN 8 FT.

.OTHERWISE...SEAS 8 FT OR LOWER OVER REMINDER OF FORECAST AREA.

.ITCZ 04S151W 02S140W 01S130W 02S125W. SCATTERED MODERATE TSTMS
WITHIN 270 NM OF ITCZ.

.SCATTERED MODERATE TSTMS FROM 15S TO 06S BETWEEN 130W AND
138W.




$$

.FORECASTER PECHACEK. HONOLULU HI.


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