High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 252234
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2330 UTC WED APR 25 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC APR 25 2018.
24 HOUR FORECAST VALID 1800 UTC APR 26 2018.
48 HOUR FORECAST VALID 1800 UTC APR 27 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT FROM 25S138W 20S150W MOVING E 20 KT. NW WINDS 20 TO 25 KT
WITHIN 240 NM NE OF FRONT S OF 23S. ISOLATED MODERATE TSTMS
WITHIN 150 NM NE OF FRONT S OF 21S.
.24 HOUR FORECAST FRONT FROM 25S128W TO 21S138W. WINDS DIMINISHED
TO 20 KT OR LESS.
.48 HOUR FORECAST FRONT 22S120W 22S125W 21S133W.

.TROUGH 20S150W 16S162W 09S172W NEARLY STATIONARY. ISOLATED
MODERATE TSTMS WITHIN 60 NM OF LINE 16S162W 24S158W.
.24 HOUR FORECAST TROUGH MERGED WITH TROUGH DESCRIBED BELOW.

.TROUGH 25S165W 20S165W MOVING E 15 KT. ISOLATED TSTMS S OF 20S
BETWEEN 160W AND 163W.
.24 HOUR FORECAST TROUGH 25S158W 20S160W 10S173W.
.48 HOUR FORECAST TROUGH 25S152W 19S160W 16S170W.

.TROUGH JUST W OF AREA MOVING SE 10 KT.
.24 HOUR FORECAST TROUGH 25S163E 18S160E.
.48 HOUR FORECAST TROUGH 25S166E 17S163E 15S160E.

.ITCZ 03S130W 04S160W NEARLY STATIONARY. ISOLATED MODERATE TSTMS
WITHIN 180 NM S OF ITCZ.

.RIDGE 22S120W 18S140W 15S160W NEARLY STATIONARY.

.SEAS 8 TO 9 FT S OF LINE 25S133W 20S160W 25S165W.
.24 HOUR FORECAST SEAS 8 FT S OF 23S BETWEEN 130W AND 140W.
.48 HOUR FORECAST SEAS 8 TO 9 FT SE OF LINE 22S120W 25S130W AND S
OF LINE 25S155W 22S160W 25S170W. SEAS 8 FT FROM 03S TO 09S
BETWEEN 142W AND 153W.

.REMAINDER AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.ISOLATED MODERATE TSTMS W OF LINE 00S160E 13S178E 21S160E.

$$
.HONOLULU FORECASTER.



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