High Seas Forecast
Issued by NWS

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FZPS40 PHFO 212207
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2330 UTC TUE FEB 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 FEB 21 2017.
24 HOUR FORECAST VALID 1800 UTC FEB 22 2017.
48 HOUR FORECAST VALID 1800 UTC FEB 23 2017.

.WARNINGS...

...TROPICAL STORM WARNING...
.TROPICAL CYCLONE BART 24.1S 159.6W 994 MB MOVING ESE 29 KT.
TROUGH FROM TC TO 19S161W TO 17S164W. MAXIMUM SUSTAINED WINDS 45
KT GUSTS 55 KT. WINDS 34 KT OR GREATER AND SEAS 12 FT OR HIGHER
WITHIN 180 NM NE SEMICIRCLE OF TC. WINDS 20 TO 33 KT ELSEWHERE
WITHIN 360 NM N QUADRANT AND WITHIN 240 NM E SEMICIRCLE OF TC.
NUMEROUS MODERATE TO STRONG TSTMS WITHIN 180 NM SE SEMICIRCLE OF
TC. SCATTERED MODERATE TO LOCALLY STRONG TSTMS ELSEWHERE WITHIN
150 NM NE OF TROUGH.
.24 HOUR FORECAST TROPICAL CYCLONE BART MOVED S OF AREA. TROUGH
FROM 25S153W TO 22S154W. OVER FORECAST WATERS WINDS 20 TO 25 KT
WITHIN 120 NM OF TROUGH. SEAS DESCRIBED BELOW.
.48 HOUR FORECAST TROUGH MOVED S OF AREA. WINDS DIMINISHED TO 20
KT OR LESS.

...STORM WARNING...
.LOW...POSSIBLE TC...NEAR 20S174W 1000 MB MOVING SE 20 KT. TROUGH
FROM 25S173W TO LOW 15S174E TO 13S160E. WINDS 30 TO 45 KT WITHIN
240 NM N AND NE QUADRANTS OF LOW. WINDS 20 TO 30 KT ELSEWHERE
WITHIN 420 NM NE OF LOW AND TROUGH E OF 174E...AND WITHIN 120 NM
SW SEMICIRCLE OF LOW. SEAS 12 FT OR HIGHER WITHIN 300 NM N OF LOW.
NUMEROUS MODERATE TO STRONG TSTMS WITHIN 240 NM NE SEMICIRCLE OF
LOW. SCATTERED MODERATE TO LOCALLY STRONG TSTMS ELSEWHERE WITHIN
420 NM NE AND E OF TROUGH AND LOW.
.12 HOUR FORECAST LOW...LIKELY TC...NEAR 23S170W 997 MB. TROUGH
FROM 25S171W TO LOW TO 20S171W TO 14S168E TO 13S160E. WINDS 35 TO
50 KT WITHIN 180 NM N AND NE QUADRANTS OF LOW. WINDS 25 TO 35 KT
ELSEWHERE WITHIN 300 NM NE OF LOW AND TROUGH E OF 174W. WINDS 20
TO 30 KT WITHIN 300 NM N OF TROUGH BETWEEN 173E AND 174W. SEAS 12
FT OR HIGHER WITHIN 420 NM N OF LOW.
.24 HOUR FORECAST LOW MOVED S OF AREA. TROUGH FROM 25S164W TO
22S164W TO 16S179E TO 13S160E. WINDS 30 TO 40 KT WITHIN 300 NM NE
AND E OF TROUGH E OF 166W. WINDS 20 TO 30 KT ELSEWHERE WITHIN 420
NM NE AND E OF TROUGH E OF 166W...AND WITHIN 240 NM NE OF TROUGH E
OF 175E. SEAS DESCRIBED BELOW.
.48 HOUR FORECAST TROUGH FROM 25S159W TO 19S170W TO 15S173E TO
14S160E. WINDS 20 TO 30 KT WITHIN 240 NM NE OF TROUGH E OF 175E.

.SYNOPSIS AND FORECAST.

.TROUGH FROM 14S140W TO 10S154W TO 07S162W MOVING SW 10 KT.
SCATTERED MODERATE TSTMS WITHIN 240 NM OF TROUGH.
.24 HOUR FORECAST WEAKENING TROUGH FROM 14S153W TO 12S156W TO
12S163W.
.48 HOUR FORECAST WEAK TROUGH FROM 16S152W TO 13S160W.

.TROUGH FROM 25S143W TO 23S147W TO 18S151W MOVING SE 15 KT.
ISOLATED MODERATE TSTMS WITHIN 120 NM OF TROUGH.
.24 HOUR FORECAST TROUGH MOVED S OF AREA.

.RIDGE FROM 24S120W TO 20S143W NEARLY STATIONARY.

.RIDGE FROM 14S155W TO 07S175W TO 02S160E NEARLY STATIONARY.

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

.SEAS 8 TO 12 FT ELSEWHERE S OF A LINE FROM 25S154W TO 16S160W TO
10S175E TO 25S172E.
.24 HOUR FORECAST SEAS 12 TO 18 FT S OF A LINE FROM 22S161W TO
17S166W TO 17S170W. SEAS 8 TO 12 FT ELSEWHERE S OF A LINE FROM
22S160W TO 14S166W TO 12S176E.
.48 HOUR FORECAST SEAS 12 TO 15 FT S OF A LINE FROM 24S155W TO
22S161W. SEAS 8 TO 12 FT ELSEWHERE S OF A LINE FROM 25S151W TO
19S156W TO 16S170W. SEAS 8 TO 11 FT FROM 14S TO 20S BETWEEN 170W
AND 179E.

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

.ITCZ FROM 05S120W TO 04S129W. ISOLATED MODERATE TSTMS WITHIN 60
NM OF ITCZ.

.SCATTERED MODERATE TSTMS N OF 04S W OF 168E.

$$

.FORECASTER BRAVENDER. HONOLULU HI.



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