High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 160336
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC TUE JAN 16 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC JAN 16 2018.
24 HOUR FORECAST VALID 0000 UTC JAN 17 2018.
48 HOUR FORECAST VALID 0000 UTC JAN 18 2018.

.WARNINGS.

...GALE WARNING...
.STATIONARY FRONT FROM 22N160E TO 22N169E TO 24N176E. WINDS N TO
NE 20 TO 25 KT WITHIN 300 NM N OF FRONT.
.12 DEVELOPING LOW NEAR 26N166E 1015 MB. FRONTS FROM LOW TO 24N174E
TO 25N176W AND FROM LOW TO 21N160E. WINDS E TO N 20 TO 30 KT OVER
FORECAST WATERS N OF FRONT. ASSOCIATED SEAS INCLUDED BELOW.
.24 HOUR FORECAST LOW NEAR 26N172W 1014 MB. FRONTS FROM LOW TO
28N177E TO 25N176W TO 25N168W AND FROM LOW TO 23N167E TO 20N160E.
WINDS INCREASING 30 TO 40 KT WITHIN 180 OF LOW CENTER NW SEMICIRCLE.
WINDS E TO NE 20 TO 30 KT ELSEWHERE OVER FORECAST WATERS N OF FRONT.
ALSO WINDS INCREASING TO SE 20 TO 30 KT WITHIN 240 NM S OF FRONT
E OF 172W. ASSOCIATED SEAS INCLUDED BELOW.
.36 HOUR FORECAST LOW NEAR 27N176E 1013 MB. FRONTS FROM LOW TO
29N178W TO 27N169W AND FROM LOW TO 25N174E TO 23N167E TO 20N160E.
WINDS 30 TO 45 KT WITHIN 240 NM OF LOW CENTER NW SEMICIRCLE. WINDS
30 TO 35 KT WITHIN 180 NM OF LOW CENTER SE SEMICIRCLE. WINDS E TO
NE 20 TO 30 KT ELSEWHERE OVER FORECAST WATERS N OF FRONT. WINDS
E TO SE 20 TO 30 KT WITHIN 480 NM SE OF FRONTAL E OF 176E.
ASSOCIATED SEAS INCLUDED BELOW.
.48 HOUR FORECAST NEAR 29N178W 1010 MB. FRONTS FRONT LOW TO 30N171W
AND FROM LOW TO 25N174E TO 23N167E TO 20N160E. WINDS 30 TO 45 KT
WITHIN 240 NM OF LOW CENTER NW SEMICIRCLE. WINDS 30 TO 40 KT WITHIN
180 NM OF LOW CENTER SE SEMICIRCLE. WINDS E TO NE 20 TO 30 KT
ELSEWHERE OVER FORECAST WATERS N OF FRONT. WINDS E TO S 20 TO 30
KT ELSEWHERE N OF 20N WITHIN 720 NM E OF FRONT. ASSOCIATED SEAS
INCLUDED BELOW.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 30N172W TO 27N177W TO 24N176E MOVING E 30 KT.
WINDS NW TO N 20 TO 30 KT OVER OVER FORECAST WATERS N OF FRONT.
ALSO WINDS SW 20 TO 30 KT N OF 27N WITHIN 600 NM E OF FRONT.
ASSOCIATED SEAS INCLUDED BELOW.
.12 HOUR FORECAST FRONT 30N162W TO 27N169W TO 25N176W. WINDS NW
TO NE 20 TO 30 KT ELSEWHERE OVER OVER FORECAST WATERS N OF FRONT.
WINDS SW 20 TO 25 KT N OF 27N WITHIN 480 NM E OF FRONT. ASSOCIATED
SEAS INCLUDED BELOW.
.24 HOUR FORECAST FRONT FROM 30N151W TO 26N158W TO 25N168W.
WINDS SW TO NW 20 TO 25 KT N OF 28N E OF 162W. ASSOCIATED SEAS
INCLUDED BELOW.
.36 HOUR FORECAST FRONT FROM 30N142W TO 27N148W TO 23N157W.
ASSOCIATED WINDS DIMINISHED TO 20 KT OR LESS. ASSOCIATED SEAS
INCLUDED BELOW.
.48 HOUR FORECAST DISSIPATING FRONT FROM 27N140W TO 25N147W TO
23N157W. ASSOCIATED SEAS INCLUDED BELOW.

.STATIONARY FRONT FROM 28N140W TO 28N145W.
.12 HOUR FORECAST FRONT DISSIPATED.

.HIGH NEAR 24N158W 1020 MB. RIDGES FROM HIGH TO 26N147W AND FROM
HIGH TO 24N179W.
.12 HOUR FORECAST HIGH DISSIPATED. RIDGE FROM 28N140W TO 24N153W.
.24 HOUR FORECAST RIDGE FLATTENED OVER FORECAST AREA.

.RIDGE BUILDING OVER FORECAST AREA.
.48 HOUR FORECAST RIDGE FROM 30N163W TO 28N152W.

.OTHERWISE WINDS E TO NE 20 TO 30 KT WITHIN A POLYGON BOUND BY
16N148W 09N140W 05N165W 08N170E 06N160E 14N160E 15N174E 16N148W.
.24 HOUR FORECAST WINDS E TO NE 20 TO 30 KT WITHIN A POLYGON BOUND
BY 21N178W 18N155W 14N140W 05N166W 09N168E 16N168E 21N178W.
.48 HOUR FORECAST WINDS E TO NE 20 TO 30 KT 20N174W 20N146W 11N141W
06N170W 08N164W 14N164W 29N174W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 12 TO 18 FT WITHIN A POLYGON BOUND BY 30N161W 30N140W 07N140W
02N155W 09N171W 16N160W 17N151W 30N162W...AND ALSO NW OF A LINE
FROM 30N169W TO 26N170E. SEAS 8 TO 12 FT ELSEWHERE WITHIN A POLYGON
BOUND BY 30N160E 30N140W 00N140W 00N175E 13N165E TO 18N170E 21N175W
25N179E 20N160E 30N160E.
.24 HOUR FORECAST SEAS 12 TO 16 FT N OF A LINE FROM 30N154W TO
26N166W TO 26N176W. SEAS 8 TO 12 FT ELSEWHERE WITHIN A POLYGON
BOUND BY 30N160E 30N140W 00N140W 00N170W 15N160E 30N160E.
.48 HOUR FORECAST SEAS 12 TO 18 FT NW OF A LINE FROM 30N140W TO
26N151W. SEAS BUILDING TO 12 TO 16 FT N OF A LINE FROM 30N172W TO
24N173W. SEAS 8 TO 12 FT ELSEWHERE WITHIN A POLYGON BOUND BY
30N160E 30N140W 00N140W 00N179W 10N160E 30N160E.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ITCZ FROM 08N140W TO 06N150W TO TO 05N163W TO 05N170W TO 10N172E
TO 08N160E. SCATTERED MODERATE TO STRONG TSTMS WITHIN 190 NM EITHER
SIDE OF LINE OF CONVERGENCE BETWEEN 150W AND 170W. ISOLATED
MODERATE TSTMS ELSEWHERE WITHIN 240 NM EITHER SIDE OF LINE OF
CONVERGENCE.

$$

.FORECASTER BEDAL. HONOLULU HI.


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