High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 200328
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0530 UTC MON FEB 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC FEB 20 2017.
24 HOUR FORECAST VALID 0000 UTC FEB 21 2017.
48 HOUR FORECAST VALID 0000 UTC FEB 22 2017.

.WARNINGS.

...GALE WARNING...
.LOW 16S172W 1005 MB MOVING ESE 20 KT. SECOND LOW 17S175E 1003 MB
NEARLY STATIONARY. TROUGH FROM 19S158W TO FIRST LOW TO SECOND LOW
TO 16S160E. WINDS 20 TO 30 KT WITHIN 360 NM N OF LOWS AND TROUGH
BETWEEN 170E AND 161W...AND S OF 21S BETWEEN 170E AND 179E.
NUMEROUS MODERATE TSTMS WITHIN 300 NM N OF TROUGH E OF 179E...AND
FROM 07S TO 14S W OF 179E. ISOLATED MODERATE TSTMS WITHIN 180 NM S
OF TROUGH.
.24 HOUR FORECAST LOW 21S162W 1003 MB. SECOND LOW 17S174E 1004
MB. TROUGH FROM 22S156W TO FIRST LOW TO 19S165W TO SECOND LOW TO
15S160E. WINDS 25 TO 35 KT AND SEAS 12 TO 15 FT WITHIN 150 NM NE
OF FIRST LOW. WINDS 20 TO 30 KT ELSEWHERE WITHIN 420 NM N OF LOWS
AND TROUGHS E OF 167E.
.48 HOUR FORECAST FIRST LOW MOVED S OF AREA. SECOND LOW 18S175W
1006 MB. TROUGH FROM 25S156W TO 21S165W TO LOW TO 13S160E. WINDS
25 TO 35 KT AND SEAS 12 TO 16 FT WITHIN 150 NM NE QUADRANT OF
SECOND LOW. WINDS 20 TO 30 KT ELSEWHERE WITHIN 420 NM N OF LOW AND
TROUGHS E OF 167E.

.SYNOPSIS AND FORECAST.

.TROUGH FROM 25S145W TO 22S147W TO 17S154W MOVING E SLOWLY. NW TO
N WINDS 20 TO 25 KT WITHIN 180 NM E OF TROUGH S OF 23S. SCATTERED
MODERATE TSTMS WITHIN 180 NM NE AND E OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 25S144W TO 22S146W TO 17S152W.
WINDS DIMINISHED TO 20 KT OR LESS.
.48 HOUR FORECAST TROUGH FROM 25S144W TO 21S149W.

.TROUGH FROM 14S143W TO 05S149W MOVING W 10 KT. ISOLATED MODERATE
TSTMS WITHIN 180 NM W OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 14S147W TO 06S154W.
.48 HOUR FORECAST TROUGH FROM 13S151W TO 08S158W.

.RIDGE FROM 25S128W TO 18S143W TO 10S155W TO 06S172W TO 03S160E
NEARLY STATIONARY.

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

.SEAS 8 TO 11 FT S OF A LINE FROM 22S178E TO 19S172E TO
22S169E...AND FROM 10S TO 16S BETWEEN 164W AND 174E. SEAS 8 TO 9
FT S OF 23S BETWEEN 138W AND 142W.
.24 HOUR FORECAST SEAS 8 TO 12 FT ELSEWHERE FROM 14S TO 23S
BETWEEN 160W AND 170W...AND FROM 10S TO 17S BETWEEN 170W AND 172E.
SEAS 8 TO 9 FT S OF 20S BETWEEN 170E AND 176E.
.48 HOUR FORECAST SEAS 8 TO 12 FT ELSEWHERE S OF A LINE FROM
20S153W TO 12S170W TO 12S175E.

.OTHERWISE SEAS 8 FT OR LESS OVER REMAINDER OF AREA.

$$

.FORECASTER BRAVENDER. HONOLULU HI.



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