High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 162258
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC SAT DEC 16 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 1800 UTC DEC 16 2017.
24 HOUR FORECAST VALID 1800 UTC DEC 17 2017.
48 HOUR FORECAST VALID 1800 UTC DEC 18 2017.

.WARNINGS.

...GALE WARNING...
.FRONT FROM 30N175W TO 26N176E TO 24N168E MOVING SE 15 KT. N TO
NE WINDS 25 TO 35 KT N OF FRONT E OF 179E. NE WINDS 20 TO 25 KT
WITHIN 150 NM N OF FRONT BETWEEN 179E AND 174E. NE WINDS 20 TO 25
KT WITHIN 150 NM N OF FRONT E OF 167E...AND ELSEWHERE FROM 26N TO
28N BETWEEN 162E AND FRONT. ISOLATED TSTMS WITHIN 60 NM OF FRONT E
OF 179E.
.24 HOUR FORECAST FRONT FROM 30N168W TO 24N177W TO 23N172E. NE
WINDS 30 TO 40 KT N OF FRONT E OF 178W. NE TO E WINDS 20 TO 30 KT
N OF FRONT W OF 178W.
.48 HOUR FORECAST FRONT FROM 30N155W TO 24N167W TO 24N177W TO
18N177E. NE TO E WINDS 25 TO 35 KT N OF FRONT E OF 177W. NE TO E
WINDS 20 TO 30 KT WITHIN 480 NM N OF FRONT W OF 177W.

.SYNOPSIS AND FORECAST.

.LOW 22N157W 1009 MB MOVING NW 10 KT. TROUGH FROM 29N156W TO LOW
TO 19N158W. E TO SE WINDS 20 TO 25 KT N OF A LINE FROM 20N145W TO
28N156W. SCATTERED TSTMS WITHIN 180 NM E OF LOW AND TROUGH N OF
21N.
.24 HOUR FORECAST LOW 24N160W 1011 MB AND WEAKENING. TROUGH FROM
30N159W TO LOW TO 20N161W TO 17N166W. WINDS DIMINISHED TO 20 KT OR
LESS.
.48 HOUR FORECAST LOW DISSIPATED. TROUGH MERGED WITH FRONT
DESCRIBED ABOVE.

.TROUGH FROM 21N149W TO 10N158W TO 03N171W MOVING W 10 KT.
ISOLATED MODERATE TSTMS WITHIN 150 NM OF TROUGH E OF 153W...AND
FROM 21N TO 28N BETWEEN 145W AND 151W.
.24 HOUR FORECAST TROUGH FROM 21N153W TO 11N160W TO 03N172W.
.48 HOUR FORECAST TROUGH FROM 18N158W TO 03N176W.

.NE TO E WINDS 20 TO 25 KT FROM 08N TO 15N W OF 170W.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 05N TO 18N W OF
176E.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 05N TO 20N W OF
174E.

.RIDGE FROM 30N168W TO 26N174W TO 24N178E MOVING E SLOWLY AND
WEAKENING.

.SEAS 8 TO 11 FT N OF A LINE FROM 07N140W TO 22N153W TO 21N162W...
AND N OF A LINE FROM 07N162W TO 03N176W TO 05N174E TO 13N162E.
.24 HOUR FORECAST SEAS 12 TO 18 FT N OF LINE FROM 30N167W TO
25N175W TO 25N176E. SEAS 8 TO 12 FT ELSEWHERE N OF A LINE FROM
22N148W TO 23N162W TO 23N174W...AND N OF A LINE FROM 05N174W TO
03N176E TO 08N160E.
.48 HOUR FORECAST SEAS 12 TO 18 FT N OF A LINE FROM 30N156W TO
21N177W TO 21N176E. SEAS 8 TO 12 FT ELSEWHERE N OF A LINE FROM
24N146W TO 24N160W TO 05N168E...AND FROM 05N TO 20N W OF 168E.

.OTHERWISE WINDS 20 KT OR LESS AND SEAS 8 FT OR LESS OVER
REMAINDER OF AREA.

.SCATTERED MODERATE TSTMS FROM 02N TO 04N BETWEEN 175W AND 178E...
FROM 02N TO 07N BETWEEN 177E AND 171E...AND FROM 02N TO 04N W OF
167E.

$$

.FORECASTER BRAVENDER. HONOLULU HI.


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