High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 161533
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC DEC 16 2017.
24 HOUR FORECAST VALID 1200 UTC DEC 17 2017.
48 HOUR FORECAST VALID 1200 UTC DEC 18 2017.

.WARNINGS.

...GALE WARNING...
.COLD FRONT FROM 30N180E TO 27N173E TO 24N167E TO 23N160E MOVING E
20 KT E OF 167E AND NEARLY STATIONARY ELSEWHERE. 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 MODERATE TSTMS WITHIN 60 NM OF
FRONT.
.24 HOUR FORECAST FRONT FROM 30N168W TO 26N175W TO 23N178E. NE WINDS
30 TO 35 KT BETWEEN FRONT AND 179E N OF 26N. WINDS 20 TO 30 KT
ELSEWHERE BETWEEN FRONT AND 168E.
.48 HOUR FORECAST FRONT FROM 30N156W TO 19N169W. NE WINDS 30 TO 35
KT N OF LINE FROM 30N162W TO 26N169W TO 26N177W. WINDS 20 TO 30 KT
ELSEWHERE N OF LINE FROM 30N158W TO 25N166W TO 25N173W TO 21N180W
TO 21N178E...AND FROM 21N TO 27N BETWEEN 170E AND 178E.

.SYNOPSIS AND FORECAST.

.TROUGH FROM 30N155W TO 24N157W TO 20N157W MOVING E SLOWLY. E TO SE
WINDS 20 TO 30 KT N OF LINE FROM 15N140W TO 27N154W TO 27N156W. NE
WINDS 20 TO 30 KT N OF LINE FROM 27N156W TO 25N160W...AND IN AREA
BOUNDED BY 30N160W 23N160W 23N169W 30N160W. ISOLATED MODERATE TSTMS
WITHIN 60 NM OF LINE FROM 27N151W TO 21N147W...AND FROM 23N TO 27N
BETWEEN 154W AND 158W.
.24 HOUR FORECAST TROUGH FROM 30N160W TO 19N162W. E TO SE WINDS 20
TO 25 KT WITHIN 90 NM OF LINE FROM 29N153W TO 22N149W.
.48 HOUR FORECAST TROUGH MERGED WITH FRONT DESCRIBED ABOVE. S TO SE
WINDS 20 TO 25 KT N OF 24N BETWEEN 149W AND 153W.

.NE TO E WINDS 20 TO 25 KT FROM 10N TO 16N W OF 173E...FROM 06N TO
15N BETWEEN 173E AND 170W...AND FROM 15N TO 20N BETWEEN 164W AND
175W.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 05N TO 20N W OF
178E.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 04N TO 20N W OF
174E.

.RIDGE FROM 30N168W TO 27N175W TO 24N178E MOVING S SLOWLY AND
WEAKENING.

.SEAS 8 TO 13 FT N OF A LINE FROM 04N140W TO 04N145W TO 21N151W TO
21N161W. SEAS 8 TO 11 FT IN AREA BOUNDED BY 30N161W 18N161W 09N151W
04N166W 04N175E 10N170E 15N163E 21N177E 22N170E 30N161W. SEAS 8 TO 9
FT S OF 04N E OF 154W.
.24 HOUR FORECAST SEAS 12 TO 17 FT N OF LINE FROM 30N169W TO 25N178W
TO 25N177E. SEAS 8 TO 12 FT ELSEWHERE N OF LINE FROM 29N168W TO
24N180W TO 23N175E TO 24N169E. SEAS 8 TO 10 FT N OF LINE FROM
10N140W TO 23N152W TO 23N159W TO 20N168W...FROM 04N TO 20N BETWEEN
170W AND 171E...AND FROM 09N TO 20N W OF 172E.
.48 HOUR FORECAST SEAS 14 TO 19 FT N OF LINE FROM 30N158W TO 25N166W
TO 23N177W TO 23N178E. SEAS 8 TO 14 FT ELSEWHERE N OF LINE FROM
30N144W TO 21N149W TO 26N159W TO 19N176W TO 19N168E. SEAS 8 TO 9 FT
FROM 10N TO 19N W OF 180E...FROM 05N TO 10N BETWEEN 172E AND
180E...AND W OF 167E BETWEEN 05N AND 10N.

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

.ITCZ FROM 10N140W TO 11N153W TO 05N165W TO 03N180W. ISOLATED
MODERATE TSTMS WITHIN 90 NM OF ITCZ.

.ISOLATED MODERATE TSTMS S OF 08N W OF 178E...E OF 143W BETWEEN 13N
AND 19N...AND WITHIN 60 NM OF 18N145W.

$$

.HONOLULU HI.



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