High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 190330
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC THU OCT 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC OCT 19 2017.
24 HOUR FORECAST VALID 0000 UTC OCT 20 2017.
48 HOUR FORECAST VALID 0000 UTC OCT 21 2017.

.WARNINGS.

...GALE WARNING...
.NE TO E WINDS 30 TO 35 KT IN SOME OF THE CHANNELS WITHIN THE
MAIN HAWAIIAN ISLANDS. FOR DETAILS SEE COASTAL WATERS FORECAST
ISSUED BY NWS HONOLULU FORECAST OFFICE UNDER AWIPS HEADER
HFOCWFHFO AND WMO HEADER FZHW50 PHFO.
.24 HOUR FORECAST LITTLE CHANGE.
.36 HOUR FORECAST NE TO E WINDS DIMINISHED BELOW GALE FORCE
AND DESCRIBED BELOW.

.SYNOPSIS AND FORECAST.

.ELSEWHERE NE TO E WINDS 20 TO 30 KT FROM 10N TO 28N BETWEEN
150W AND 175W...AND N OF 28N BETWEEN 175W AND 171E.
.24 HOUR FORECAST ELSEWHERE NE TO E WINDS 20 TO 30 KT N OF 12N
BETWEEN 148W AND 180W.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 11N TO 25N
BETWEEN 151W AND 167W.

.TROUGH FROM 29N142W TO 21N143W TO 14N144W MOVING W SLOWLY.
.24 HOUR FORECAST TROUGH FROM 26N143W TO 22N144W TO
17N143W. WINDS 20 TO 25 KT FROM 21N TO 27N E OF 147W.
.48 HOUR FORECAST WEAKENING TROUGH FROM 25N145W TO 21N145W TO
15N147W. WINDS 20 TO 25 KT FROM 22N TO 26N BETWEEN 150W AND
145W.

.TROUGH FROM 24N160E TO 24N164E TO 22N168E MOVING N 10 KT.
E WINDS 20 TO 25 KT FROM 24N TO 27N W OF 163E. SCATTERED
MODERATE TSTMS FROM 20N TO 27N W OF 170E.
.24 HOUR FORECAST TROUGH FROM 25N160E TO 26N167E TO 30N170E.
ASSOCIATED WINDS DIMINISHED TO 20 KT OR LESS.
.48 HOUR FORECAST WEAK TROUGH FROM 28N160E TO 28N165E TO
30N168E.

.SEAS 8 TO 12 FT N OF A LINE BOUNDED BY A LINE FROM 30N168W TO
20N153W TO 10N150W TO 07N166W TO 12N178E TO 30N170E TO 30N168W.
.24 HOUR FORECAST SEAS 10 TO 13 FT N OF 28N E OF 155W. SEAS 8 TO
12 FT ELSEWHERE N OF A LINE FROM 29N140W TO 20N154W TO 07N160W TO
08N180E TO 17N172E TO 30N171E.
.48 HOUR FORECAST SEAS 9 TO 12 FT NE OF A LINE FROM 30N152W TO
22N149W TO 20N140W. SEAS 8 TO 10 FT ELSEWHERE IN AREA BOUNDED
BY A LINE FROM 18N140W TO 09N154W TO 10N172E TO 17N168E TO
30N158W TO 30N140W TO 18N140W. SEAS 8 TO 9 FT NW OF A LINE FROM
30N180E TO 26N160E.

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

.ITCZ FROM 08N140W TO 10N152W TO 10N168W TO 08N173E.
SCATTERED MODERATE TSTMS FROM 06N TO 13N BETWEEN 152W AND
170W...FROM 06N TO 13N BETWEEN 178W AND 172E...AND WITHIN
180 NM N OF ITCZ BETWEEN 170W AND 177W.

.ISOLATED MODERATE TSTMS FROM 19N TO 24N BETWEEN 178W AND 180W.

$$

.FORECASTER BIRCHARD. HONOLULU HI.



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