High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 210245
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0530 UTC SAT APR 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 21 2018.
24 HOUR FORECAST VALID 0000 UTC APR 22 2018.
48 HOUR FORECAST VALID 0000 UTC APR 23 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 17S176E 1009 MB MOVING S 10 KT. SECOND LOW 09S168E 1008 MB
MOVING W SLOWLY. TROUGH FROM 23S179W TO 21S177E TO LOW TO 13S174E TO
SECOND LOW TO 05S160E NEARLY STATIONARY. NE TO E WINDS 20 TO 25 KT S
OF LINE FROM 19S169W TO 24S178E. ISOLATED MODERATE TO LOCALLY STRONG
TSTMS N OF 06S W OF 167E. ISOLATED MODERATE TSTMS FROM 12S TO 18S
BETWEEN 174W AND 179W...AND S OF 21S BETWEEN 176W AND 176E.
.24 HOUR FORECAST LOWS DISSIPATED. NEW LOW 23S171W 1011 MB. TROUGH
FROM LOW TO 18S176E TO 12S167E TO 06S160E. WINDS 20 TO 25 KT WITHIN
180 NM OF LOW SE QUADRANT.
.48 HOUR FORECAST LOW 22S166W 1010 MB. TROUGH DISSIPATED. SE WINDS
20 TO 25 KT S OF 23S BETWEEN 168W AND 176W.

.TROUGH FROM 25S139W TO 21S139W TO 16S143W NEARLY STATIONARY.
ISOLATED MODERATE TSTMS WITHIN 150 NM NE AND E OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 25S138W TO 17S144W.
.48 HOUR FORECAST TROUGH FROM 25S135W TO 22S135W TO 19S140W TO
19S148W THENCE FRONT TO 20S150W TO 25S157W.

.TROUGH FROM 10S161W TO 13S153W TO 18S150W MOVING SW 10 KT. ISOLATED
MODERATE TSTMS WITHIN 60 NM OF LINE FROM 10S161W TO 12S156W.
.24 HOUR FORECAST TROUGH FROM 13S164W TO 18S153W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.RIDGE FROM 25S133W TO 23S137W MOVING S SLOWLY.

.RIDGE FROM 15S172W TO 07S177E TO 02S169E MOVING SW SLOWLY.

.OTHERWISE...WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.

.SEAS 8 TO 11 FT S OF 19S BETWEEN 165E AND 168W.
.24 HOUR FORECAST SEAS 8 TO 9 FT S OF 21S BETWEEN 168E AND 174E.
.48 HOUR FORECAST SEAS 8 TO 9 FT S OF 23S BETWEEN 166E AND 176E.

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

.ISOLATED MODERATE TSTMS S OF 23S BETWEEN 161E AND 167E.

$$

.FORECASTER KINEL. HONOLULU HI.



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