High Seas Forecast
Issued by NWS

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441
FZPS40 PHFO 291031
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1130 UTC SAT APR 29 2017

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC APR 29 2017.
24 HOUR FORECAST VALID 0600 UTC APR 30 2017.
48 HOUR FORECAST VALID 0600 UTC MAY 01 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 10S165E 1009 MB NEARLY STATIONARY. TROUGHS FROM LOW TO
09S160E AND FROM LOW TO 11S180E. ISOLATED MODERATE TSTMS WITHIN
120 NM OF LOW AND TROUGHS.
.24 HOUR FORECAST LOW 10S166E 1006 MB. TROUGHS FROM LOW TO
09S160E AND FROM LOW TO 12S180E.
.48 HOUR FORECAST LOW 12S169E 1006 MB. TROUGHS FROM LOW TO
10S160E AND FROM LOW TO 13S180E.

.LOW NEAR 20S162W 1007 MB MOVING N 10 KT. TROUGHS FROM LOW TO
25S157W AND FROM LOW TO 13S170W 11S180E. ISOLATED MODERATE TSTMS
WITHIN 120 NM OF LOW AND TROUGHS.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH 25S158W 15S166W 12S180E.
.48 HOUR FORECAST TROUGH 25S158W 15S166W 13S180E.

.LOW NEAR 09S166W 1007 MB MOVING W SLOWLY. TROUGH FROM LOW TO
09S158W. ISOLATED MODERATE TSTMS WITHIN 120 NM OF LOW AND
TROUGH...AND FROM 07S TO 09S BETWEEN 167W AND 171W.
.24 HOUR FORECAST LOW 08S170W 1008 MB.
.48 HOUR FORECAST LOW 08S171W 1009 MB.

.TROUGH 01S143W 09S137W MOVING W 15 KT. SCATTERED MODERATE
TSTMS WITHIN 300 NM E OF TROUGH.
.24 HOUR FORECAST TROUGH 02S150W 08S145W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.FRONT 25S171E 20S167E MOVING E 10 KT. ISOLATED MODERATE TSTMS
WITHIN 180 NM E OF FRONT.
.24 HOUR FORECAST FRONT 25S178E 20S171E.
.48 HOUR FORECAST FRONT 25S177W 19S178W.

.RIDGE 25S141W 22S150W 21S158W MOVING E SLOWLY.

.RIDGE 25S179E 20S173E 18S167E MOVING E SLOWLY.

.WINDS 20 TO 25 KT S OF 22S E OF 131W.
.24 HOUR FORECAST WINDS DECREASED TO 20 KT OR LESS.
.48 HOUR FORECAST WINDS 20 TO 25 KT FROM 15 TO 20S W OF 170E.

.OTHERWISE WINDS 20 KT OR LESS REST OF FORECAST AREA.

.SEAS 8 TO 12 FT S OF LINE 10S120W 18S145W 25S150W.
.24 HOUR FORECAST SEAS 8 TO 9 FT E OF 131W S OF 05S.
.48 HOUR FORECAST SEAS 8 TO 9 FT E OF 123W S OF 03S.

.OTHERWISE SEAS 8 FT OR LOWER REST OF FORECAST AREA.

.ISOLATED MODERATE TSTMS E OF 121 BETWEEN 11S AND 14S...AND S
OF 22S BETWEEN 148W AND 152W...AND N OF 05S W OF 180E.

$$

.FORECASTER POWELL. HONOLULU HI.



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