High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 191025
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1130 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC FEB 19 2017.
24 HOUR FORECAST VALID 0600 UTC FEB 20 2017.
48 HOUR FORECAST VALID 0600 UTC FEB 21 2017.

.WARNINGS.

...GALE WARNING...
.LOW 21S176E 1002 MB MOVING WNW SLOWLY. TROUGH FROM LOW TO 17S170E
TO 17S160E. SECOND TROUGH FROM 14S171E TO 17S176E. WINDS 20 TO 30 KT
AND SEAS 8 TO 11 FT WITHIN 360 NM OF LOW S AND SW QUADRANTS. W TO NW
WINDS 20 TO 30 KT AND SEAS 8 TO 9 FT FROM 11S TO 14S BETWEEN 170E
AND 180E. ISOLATED TO LOCALLY SCATTERED MODERATE TO STRONG TSTMS
FROM 10S TO 15S BETWEEN 172E AND 175E. ISOLATED MODERATE TSTMS
ELSEWHERE FROM 08S TO 13S BETWEEN 166E AND 179E.
.24 HOUR FORECAST LOW 17S177E 1002 MB. SECOND LOW 17S167W 1005 MB.
TROUGH FROM 17S160E TO FIRST LOW TO SECOND LOW TO 19S158W. SECOND
TROUGH DISSIPATED. W TO NW WINDS 20 TO 30 KT AND SEAS 8 TO 12 FT
WITHIN 360 NM N OF LOWS AND TROUGH BETWEEN 165W AND 173E. E TO SE
WINDS 20 TO 25 KT AND SEAS 8 TO 9 FT S OF 20S BETWEEN 170E AND 179E.
.48 HOUR FORECAST LOW 16S175E 1003 MB. SECOND LOW 22S162W 1002 MB.
TROUGH FROM 16S160E TO LOW TO 18S174W TO SECOND LOW. WINDS 25 TO 35
KT AND SEAS 8 TO 14 FT FROM 17S TO 24S BETWEEN 159W AND 166W. NW
WINDS 25 TO 35 KT AND SEAS 8 TO 13 FT WITHIN 300 NM N OF TROUGH
BETWEEN 166W AND 176W. W TO NW WINDS 20 TO 30 KT AND SEAS 8 TO 11 FT
WITHIN 270 NM N OF TROUGH AND FIRST LOW BETWEEN 170E AND 176W.

.SYNOPSIS AND FORECAST.

.TROUGH 25S145W 16S160W 15S167W 18S176W NEARLY STATIONARY. NW TO N
WINDS 20 TO 30 KT AND SEAS 8 TO 11 FT S OF 21S BETWEEN 139W AND
143W. W TO NW WINDS 20 TO 30 KT AND SEAS 8 TO 9 FT FROM 11S TO 14S
BETWEEN 165W AND 180W. ISOLATED TO LOCALLY SCATTERED MODERATE TO
STRONG TSTMS WITHIN 225 NM N AND NE OF TROUGH. ISOLATED MODERATE
TSTMS WITHIN 60 NM SE AND S OF TROUGH BETWEEN 169W AND 174W.
.24 HOUR FORECAST TROUGH 25S143W 16S152W. NW TO N WINDS 20 TO 25 KT
AND SEAS 8 TO 9 FT S OF 21S BETWEEN 141W AND 143W.
.48 HOUR FORECAST TROUGH 25S142W 16S152W. WINDS EASED TO 20 KT OR
LESS AND SEAS SUBSIDED TO 8 FT OR LESS.

.TROUGH 06S146W 14S139W MOVING W 10 KT. ISOLATED MODERATE TO
LOCALLY STRONG TSTMS FROM 08S TO 12S BETWEEN 132W AND 146W.
.24 HOUR FORECAST TROUGH 06S150W 14S144W.
.48 HOUR FORECAST TROUGH 07S155W 13S148W.

.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 20S 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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