High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 240330
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0530 UTC TUE APR 24 2018

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

SECURITE

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

SYNOPSIS VALID 0000 UTC APR 24 2018.
24 HOUR FORECAST VALID 0000 UTC APR 25 2018.
48 HOUR FORECAST VALID 0000 UTC APR 26 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH FORM 25S128W TO 23S130W TO 21S135W. TROUGH MOVING E 10 KT
S OF 23S AND NEARLY STATIONARY N OF 23S. WIND N 20 TO 25 KT S
OF 23S WITHIN 120 NM E OF TROUGH AXIS. ISOLATED MODERATE TSTMS
WITHIN 360 NM E AND NE OF TROUGH AXIS.
.24 HOUR FORECAST TROUGH FROM 25S126W TO 23S130W. WINDS DIMINISHED
TO 20 KT OR LESS.
.36 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 25S145W TO 23S151W TO 21S158W. TROUGH MOVING E 15 KT
S OF 23S AND NE 10 KT N OF 23S. WINDS INCREASING TO N TO NW 20 TO
25 KT S OF 23S WITHIN 180 NM E OF TROUGH AXIS. ISOLATED MODERATE
TSTMS WITHIN A POLYGON BOUND BY 14S147W 20S135W 25S135W 25S148W
23S153W 18S162W 14S147W.
.24 HOUR FORECAST DEVELOPING COLD FRONT FROM 25S140W TO 22S145W TO
21S153W. WINDS N TO NW 20 TO 25 KT S OF 22S WITHIN 180 NM E OF
DEVELOPING FRONT.
.48 HOUR FORECAST FRONT FROM 25S134W TO 20S142W TO 20S153W. WINDS N
TO NW 20 TO 25 KT S OF 24S WITHIN 180 NM E OF FRONT.

.TROUGH FROM 15S161W TO 18S157W TO 19S152W MOVING WNW SLOWLY.
ASSOCIATED TSTMS INCLUDED WITH TROUGH DESCRIBED IMMEDIATELY ABOVE.
.24 HOUR FORECAST TROUGH FROM 16S164W TO 21S153W.
.48 HOUR FORECAST TROUGH FROM 14S170W TO 18S164W TO 20S153W.

.RIDGE FROM 21S120W TO 11S146W.
.24 HOUR FORECAST RIDGE FROM 22S120W TO 13S151W.
.48 HOUR FORECAST RIDGE FROM 23S120W TO 17S138W TO 14S155W.

.WINDS 20 KT OR LESS REMAINING FORECAST AREA.

.SEAS 8 TO 9 FT FROM 06S TO 14S E OF 128W.
.24 HOUR FORECAST SEAS 8 TO 9 FT SW OF A LINE FROM 21S169W TO
25S156W.
.48 HOUR FORECAST SEAS 8 TO 9 FT S OF 24S BETWEEN 159W AND 139W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.OTHERWISE SCATTERED MODERATE TO STRONG TSTMS FROM 03S TO 11S
W OF 163E. ISOLATED MODERATE TSTMS ELSEWHERE OVER FORECAST WATERS
W OF 179W.

$$

.FORECASTER BEDAL. HONOLULU HI.



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