High Seas Forecast
Issued by NWS

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FZPS40 PHFO 282315
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2330 UTC FRI APR 28 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC APR 28 2017.
24 HOUR FORECAST VALID 1800 UTC APR 29 2017.
48 HOUR FORECAST VALID 1800 UTC APR 30 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 11S179W 1009 MB NEARLY STATIONARY. TROUGHS FROM LOW TO
14S172W AND FROM LOW TO 09S172E. SCATTERED MODERATE TO STRONG
TSTM WITHIN 540 NM N OF TROUGH AXIS W OF 179W. ISOLATED MODERATE
TSTMS ELSEWHERE WITHIN 240 NM OF TROUGH AXIS.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 11S179W TO 13S170W
TO 16S164W.
.48 HOUR FORECAST TROUGH MERGED WITH TROUGH DESCRIBED IMMEDIATELY
BELOW.

.LOW NEAR 13S163E 1008 MB NEARLY STATIONARY. SCATTERED STRONG
TSMTS WITHIN 300 NM OF CENTER.
.24 HOUR FORECAST LOW NEAR 11S165E 1007 MB. TROUGHS FROM LOW
TO 13S172E AND FROM LOW TO 09S160E.
.48 HOUR FORECAST LOW NEAR 11S165E 1006 MB. TROUGHS FROM LOW TO
12S175E TO 11S179W AND FROM LOW TO 11S165E.

.COLD FRONT NEAR 25S124W MOVING NE 15 KT. TROUGH FROM 18S125W
 TO 21S124W TO 24S120W NEARLY STATIONARY.
.24 HOUR FORECAST FRONT MERGED WITH TROUGH ALONG 20S120W TO
20S127W.
.48 HOUR FORECAST FRONT DISSIPATED.

.COLD FRONT NEAR 25S160W TO 22S164W MOVING ENE 10 KT THENCE A
TROUGH TO 14S172W. SCATTERED MODERATE TSTMS WITHIN 360 NM E OF
FRONT. ISOLATED MODERATE TO STRONG TSTMS WITHIN 420 NM E AND NE
OF TROUGH AXIS.
.24 HOUR FORECAST FRONT FROM 25S154W TO 21S160W THENCE A TROUGH
TO 17S164W.
.48 HOUR FORECAST FRONT FROM 25S148W TO 22S153W. TROUGH FROM
17S164W TO 21S160W.

.COLD FRONT FROM 25S164E TO 23S163E TO 20S160E MOVING E 20 KT.
SCATTERED MODERATE TO STRONG TSTMS WITHIN 150 NM AND 480 NM E OF
FRONT.
.24 HOUR FORECAST FRONT FROM 25S172E TO 20S168E.
.48 HOUR FORECAST FRONT FROM 25S179W TO 22S175E TO 20S168E.

.TROUGH FROM 11S136W TO 06S143W NEARLY STATIONARY. SCATTERED
MODERATE TO STRONG TSTMS FROM 00S TO 06S BETWEEN 142W AND 132W.
ISOLATED MODERATE TSTMS ELSEWHERE WITHIN A POLYGON BOUND BY 00S160W
00S135W 10S125W 17S125W 17S145W 00S160W.
.48 HOUR TROUGH DISSIPATED.

.TROUGH FROM 06S172W TO 08S168W TO 08S161W NEARLY STATIONARY.
SCATTERED MODERATE TO STRONG TSTMS WITHIN 300 NM N OF TROUGH AXIS.
.24 HOUR FORECAST TROUGH FROM 07S175W TO 06S165W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.WINDS 20 KT OR LESS ENTIRE FORECAST AREA.

.SEAS 8 TO 13 FT WITHIN A POLYGON BOUND BY 06S120W 25S120W 25S150W
20S150W 06S120W.
.24 HOUR FORECAST SEAS 8 TO 11 FT FROM 08S TO 25S BETWEEN 132W
AND 120W.
.48 HOUR FORECAST SEAS 8 TO 9 FT FROM 12S TO 25S BETWEEN 124W
AND 120W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.OTHERWISE AND ELSEWHERE SCATTERED STRONG TO SEVERE TSTMS N OF
10S W OF 172E.

$$

.FORECASTER BEDAL. HONOLULU HI.



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