High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 191525
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC SUN FEB 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC FEB 19 2017.
24 HOUR FORECAST VALID 1200 UTC FEB 20 2017.
48 HOUR FORECAST VALID 1200 UTC FEB 21 2017.

.WARNINGS.

...GALE WARNING...
.LOW 21S175E 1003 MB MOVING WNW 10 KT. TROUGH FROM LOW TO 17S170E TO
17S160E. SECOND TROUGH FROM 14S171E TO 18S178E. WINDS 20 TO 30 KT
AND SEAS 8 TO 11 FT OVER FORECAST WATERS WITHIN 390 NM OF LOW S
QUADRANT. W TO NW WINDS 20 TO 30 KT AND SEAS 8 TO 9 FT FROM 10S TO
14S BETWEEN 170E AND 180E. ISOLATED TO LOCALLY SCATTERED MODERATE TO
STRONG TSTMS FROM 10S TO 14S BETWEEN 171E AND 175E. ISOLATED
MODERATE TSTMS ELSEWHERE FROM 08S TO 12S W OF 177E...WITHIN 60 NM OF
LINE 15S170E 19S165E...AND FROM 19S TO 22S BETWEEN 175E AND 177W.
.24 HOUR FORECAST LOW 17S177E 1004 MB. SECOND LOW 18S166W 1005 MB.
TROUGH FROM 18S160E TO FIRST LOW TO SECOND LOW TO 19S158W. SECOND
TROUGH DISSIPATED. W TO NW WINDS 20 TO 30 KT AND SEAS 8 TO 13 FT
WITHIN 360 NM N OF LOWS AND TROUGH BETWEEN 164W AND 171E. E TO SE
WINDS 20 TO 25 KT AND SEAS 8 TO 9 FT S OF 20S BETWEEN 173E AND 179E.
.48 HOUR FORECAST LOW 16S176E 1006 MB. SECOND LOW 24S159W 1001 MB.
TROUGH FROM 15S160E TO LOW TO 18S170W TO SECOND LOW. WINDS 25 TO 35
KT AND SEAS 8 TO 16 FT S OF 20S BETWEEN 157W AND 162W. NW WINDS 25
TO 35 KT AND SEAS 8 TO 13 FT WITHIN 270 NM N OF TROUGH BETWEEN 162W
AND 179W. W TO NW WINDS 20 TO 25 KT AND SEAS 8 TO 11 FT WITHIN 300
NM N OF TROUGH AND FIRST LOW BETWEEN 170E AND 179W.

.SYNOPSIS AND FORECAST.

.TROUGH 25S145W 16S160W 15S165W 17S176W NEARLY STATIONARY. NW TO N
WINDS 20 TO 30 KT AND SEAS 8 TO 10 FT S OF 22S BETWEEN 138W AND
142W. W TO NW WINDS 20 TO 30 KT AND SEAS 8 TO 10 FT FROM 11S TO 14S
BETWEEN 166W AND 180W. ISOLATED TO LOCALLY SCATTERED MODERATE TO
STRONG TSTMS WITHIN 270 NM N AND NE OF TROUGH. ISOLATED MODERATE TO
LOCALLY STRONG TSTMS WITHIN 75 NM SE AND S OF TROUGH BETWEEN 162W
AND 176W.
.24 HOUR FORECAST TROUGH 25S143W 16S153W. WINDS EASED TO 20 KT OR
LESS AND SEAS SUBSIDED TO 8 FT OR LESS.
.48 HOUR FORECAST TROUGH 25S142W 17S152W.

.TROUGH 06S147W 14S140W MOVING W 10 KT. ISOLATED MODERATE TSTMS FROM
07S TO 13S BETWEEN 134W AND 147W.
.24 HOUR FORECAST TROUGH 06S152W 14S144W.
.48 HOUR FORECAST TROUGH 08S157W 13S149W.

.RIDGE 25S132W 12S150W 06S170W 06S180E 04S160E NEARLY STATIONARY.

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

.SEAS 8 TO 9 FT FROM 12S TO 19S E OF 131W.
.24 HOUR FORECAST SEAS SUBSIDED TO 8 FT OR LESS.

.SEAS 8 FT OR LESS OVER REST OF FORECAST AREA.

$$

.FORECASTER KINEL. HONOLULU HI.



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