High Seas Forecast
Issued by NWS

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FZPS40 PHFO 211533
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC APR 21 2018.
24 HOUR FORECAST VALID 1200 UTC APR 22 2018.
48 HOUR FORECAST VALID 1200 UTC APR 23 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 19S177E 1009 MB MOVING S SLOWLY. TROUGH FROM 13S172E TO LOW TO
23S180E TO 23S176W TO 19S166W NEARLY STATIONARY. NE TO E WINDS 20
TO 25 KT S OF TROUGH E OF 178E. SCATTERED MODERATE TO STRONG TSTMS
WITHIN 90 NM N OF TROUGH E OF 176W. ISOLATED MODERATE TSTMS WITHIN
180 NM SE QUADRANT OF LOW...AND ELSEWHERE S OF TROUGH E OF 176W.
.24 HOUR FORECAST LOW DISSIPATED. NEW LOW 22S171W 1011 MB. TROUGH
FROM 18S175E TO 22S179W TO LOW TO 19S162W. WINDS DIMINISHED TO 20
KT OR LESS.
.48 HOUR FORECAST LOW MOVED JUST S OF AREA. TROUGH FROM LOW TO
25S155W TO 20S163W TO 19S174W.

.LOW 09S167E 1008 MB MOVING SW SLOWLY. TROUGH FROM 05S160E TO LOW
TO 13S172E MOVING SW SLOWLY. SCATTERED MODERATE TO STRONG TSTMS N
OF A LINE FROM 09S160E TO 14S170E.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 08S160E TO 14S165E.
.48 HOUR FORECAST TROUGH MOVED W OF AREA.

.TROUGH FROM 25S135W TO 18S140W NEARLY STATIONARY. SCATTERED
MODERATE TSTMS WITHIN 210 NM NE OF...AND WITHIN 60 NM SW OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 25S137W TO 19S142W.
.48 HOUR FORECAST TROUGH MOVED S OF AREA.

.TROUGH FROM 10S164W TO 15S158W TO 17S149W MOVING SW 10 KT.
ISOLATED MODERATE TSTMS WITHIN 120 NM SW OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 12S167W TO 20S150W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.RIDGE FROM 24S124W TO 15S142W NEARLY STATIONARY.

.RIDGE FROM 15S174W TO 09S179E TO 03S166E MOVING WSW SLOWLY.

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

.SEAS 8 TO 10 FT S OF 20S BETWEEN 171W AND 168E.
.24 HOUR FORECAST SEAS 8 TO 9 FT S OF 22S BETWEEN 177E AND 169E.
.48 HOUR FORECAST SEAS 8 TO 9 FT S OF 21S BETWEEN 175E AND 167E...
AND FROM 05S TO 14S E OF 124W.

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

.ISOLATED MODERATE TSTMS S OF 23S BETWEEN 164E AND 161E...AND
WITHIN 60 NM OF A POINT 17S163W.

$$

.FORECASTER HOUSTON. HONOLULU HI.



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