High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 201049
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1130 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC FEB 20 2017.
24 HOUR FORECAST VALID 0600 UTC FEB 21 2017.
48 HOUR FORECAST VALID 0600 UTC FEB 22 2017.

.WARNINGS.

...GALE WARNING...
.COMPLEX SYSTEM WITH FIRST LOW 17S172W 1005 MB MOVING ESE 25 KT.
SECOND LOW 17S172E 1002 MB MOVING E 20 KT. TROUGH FROM 19S160W TO
FIRST LOW TO SECOND LOW TO 15S170E TO 19S160E NEARLY STATIONARY.
WINDS 30 TO 35 KT WITHIN 150 NM N AND NE QUADRANTS OF FIRST LOW.
WINDS 20 TO 30 KT WITHIN 450 NM N OF SECOND LOW AND TROUGH BETWEEN
180E AND 170E...AND ELSEWHERE WITHIN 300 NM OF FIRST LOW AND TROUGH
BETWEEN 168W AND 180E. WINDS 20 TO 25 KT S OF 21S BETWEEN 180E AND
168E. SCATTERED TO LOCALLY NUMEROUS MODERATE TO STRONG TSTMS WITHIN
600 NM N OF LOWS AND TROUGH. SCATTERED MODERATE TSTMS WITHIN 300 NM
S OF FIRST LOW AND TROUGH E OF 176E.
.24 HOUR FORECAST COMPLEX SYSTEM WITH LOW 23S161W 1005 MB. SECOND
LOW 17S180E 1004 MB. TROUGH FROM 25S157W TO FIRST LOW TO 18S167W TO
SECOND LOW TO 16S160E. WINDS 30 TO 35 KT WITHIN 240 NM N QUADRANT
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. LOW 21S167W 1003 MB.
TROUGH FROM 25S154W TO 23S155W TO LOW TO 18S170E TO 15S160E. WINDS
30 TO 35 KT WITHIN 240 NM N QUADRANT OF LOW. WINDS 20 TO 30 KT
WITHIN 120 NM E OF TROUGH E OF 155W...AND ELSEWHERE WITHIN 300 NM N
OF LOW AND TROUGH BETWEEN 162W AND 175E.

.SYNOPSIS AND FORECAST.

.TROUGH FROM 25S142W TO 17S152W TO 19S160W MOVING E SLOWLY.
SCATTERED MODERATE TSTMS WITHIN 240 NM N AND NE OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 25S142W TO 16S153W.
.48 HOUR FORECAST DISSIPATING TROUGH FROM 25S143W TO 23S149W.

.TROUGH FROM 07S149W TO 14S140W MOVING W 10 KT. ISOLATED MODERATE
TSTMS WITHIN 120 NM OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 07S154W TO 15S148W.
.48 HOUR FORECAST WEAKENING TROUGH FROM 10S159W TO 15S150W.

.RIDGE FROM 25S123W TO 09S160W TO 10S155W TO 05S180E TO 02S160E
NEARLY STATIONARY.

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

.SEAS 8 TO 12 FT WITHIN 180 NM OF A LINE FROM 11S172E TO 15S170W TO
17S160W. SEAS 8 TO 10 FT S OF 20S BETWEEN 179E AND 167E.
.24 HOUR FORECAST SEAS 12 TO 14 FT WITHIN 90 NM OF A LINE FROM
14S179E TO 18S172W...AND FROM 17S167W TO 22S161W. SEAS 8 TO 12 FT
ELSEWHERE WITHIN 180 NM OF A LINE FROM 11S171E TO 18S170W TO
23S157W. SEAS 8 TO 9 FT S OF 23S BETWEEN 178W AND 174E.
.48 HOUR FORECAST SEAS 12 TO 16 FT WITHIN 150 NM OF A LINE FROM
16S172W TO 22S163W. SEAS 12 TO 14 FT S OF 23S BETWEEN 153W AND
157W. SEAS 8 TO 12 FT ELSEWHERE S OF A LINE FROM 25S151W TO 19S156W
TO 12S174W. SEAS 8 TO 10 FT FROM 12S TO 17S BETWEEN 174W AND 175E.
SEAS 8 TO 9 FT S OF 20S BETWEEN 180E AND 169E.

.OTHERWISE...SEAS 8 FT OR LOWER OVER REMAINDER OF FORECAST AREA.

$$

.FORECASTER HOUSTON. HONOLULU HI.



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