High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 211001
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 UTC SUN JAN 21 2018

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC JAN 21 2018.
24 HOUR FORECAST VALID 0600 UTC JAN 22 2018.
48 HOUR FORECAST VALID 0600 UTC JAN 23 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 30N163E 1009 MB MOVING E 15 KT.  SW WINDS 20 TO 25 KT
BETWEEN FRONT AND 168E N OF 28N. ISOLATED MODERATE TSTMS BETWEEN
FRONT...LOW...AND 170E N OF 26N.
.24 HOUR FORECAST LOW MOVED JUST N OF FORECAST WATERS TO NEAR
31N170E. ASSOCIATED FRONT FROM 30N170E TO 25N167E TO 22N160E.
SW WINDS DIMINISHED TO 20 KT OR LESS. N WINDS 20 TO 25 KT W OF FRONT.
.48 HOUR FORECAST FRONT 30N178W TO 27N180W TO 20N170E TO 17N160E.
SW WINDS 20 TO 30 KT BETWEEN FRONT AND 168W N OF 26N. N AND NE WINDS
20 TO 25 KT BETWEEN FRONT AND 170E N OF 26N.

.DISSIPATING FRONT FROM 30N167W TO 28N176W TO 28N180W MOVING SE
SLOWLY.
.24 HOUR FORECAST FRONT DISSIPATED.

.FRONT FROM 30N156W TO 27N160W TO 26N163W MOVING E SLOWLY.
.24 HOUR FORECAST WEAK FRONT FROM 30N154W TO 27N159W.
.48 HOUR FORECAST WEAK FRONT FROM 30N148W TO 28N153W.

.TROUGH FROM 26N160W TO 22N163W NEARLY STATIONARY...DISSIPATING.
ISOLATED TSTMS WITHIN 100 NM OF TROUGH.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 22N173W TO 18N178W MOVING W SLOWLY. ISOLATED TSTMS
WITHIN 120 NM E OF TROUGH.
.24 HOUR FORECAST TROUGH DISSIPATED.

.RIDGE FROM 30N140W TO 27N156W MOVING ENE 10 KT.

.48 HOUR FORECAST NEW RIDGE FROM 30N163E TO 29N160E.

.E WINDS 20 TO 30 KT BETWEEN 23N AND 08N E OF 150W...AND BETWEEN 20N
AND 06N FROM 150W TO 170W.
.24 HOUR FORECAST E WINDS 25 AND 30 KT BETWEEN 25N AND 09N E OF 147W
...AND BETWEEN 21N AND 08N FROM 147W TO 175W.
.48 HOUR FORECAST E WINDS 20 TO 25 KT BETWEEN 23N AND 09N E OF 145W
...AND BETWEEN 21N AND 08N FROM 145W TO 170W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 12 TO 14 FT N OF A LINE FROM 30N165E TO 26N170E TO 24N178E TO
25N177W TO 30N172W. SEAS 12 TO 14 FT ALSO E OF A LIEN FROM 22N140W
TO 20N152W TO 12N155W TO 10N150W. SEAS 8 TO 12 FT ELSEWHERE N OF A
LINE FROM 13N160E TO 00N155W TO 06N140W.
.24 HOUR FORECAST SEAS 10 TO 12 FT IN THE AREA BOUNDED BY 30N154W
24N156W 24N140W 08N140W 05N170W 10N170E 30N180W 30N145W. SEAS 8 TO
10 FT N OF A LINE FROM 09N160E 03N170W 02N140W.
.48 HOUR SEAS 10 TO 11 FT E OF A LINE FROM 30N162W TO 10N174E TO
05N179W. SEAS 8 TO 11 FT N OF A LINE FROM 30N168E TO 21N161E TO
26N176W TO 30N170W. SEAS 8 TO 10 FT ELSEWHERE E OF A LINE FROM
25N180W TO 12N165E TO 00N180W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ITCZ FROM 08N140W TO 06N175W TO 08N160E. ISOLATED AREAS OF
SCATTERED MODERATE TSTMS WITHIN 160 NM OF ITCZ.

$$

.FORECASTER LAU. HONOLULU HI.



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