High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 201525
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC FRI OCT 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 OCT 20 2017.
24 HOUR FORECAST VALID 1200 UTC OCT 21 2017.
48 HOUR FORECAST VALID 1200 UTC OCT 22 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.
.12 HOUR FORECAST NE TO E WINDS EASED BELOW GALE FORCE.

.SYNOPSIS AND FORECAST.

.ELSEWHERE NE TO E WINDS 20 TO 25 KT FROM 11N TO 26N BETWEEN 150W
AND 168W...AND E WINDS 20 TO 25 KT FROM 13N TO 22N BETWEEN 168W AND
180W.
.24 HOUR FORECAST WINDS EASED TO 20 KT OR LESS.

.WEAK FRONT FROM 28N140W TO 26N150W MOVING S 10 KT.
.24 HOUR FORECAST FRONT DISSIPATED.

.TROUGH FROM 25N143W TO 22N142W TO 16N145W NEARLY STATIONARY. NE TO
E WINDS 20 TO 25 KT FROM 22N TO 25N BETWEEN 142W AND 150W. ISOLATED
MODERATE TSTMS FROM 20N TO 23N E OF 142W...AND FROM 24N TO 26N
BETWEEN 141W AND 144W.
.24 HOUR FORECAST WEAK TROUGH FROM 26N144W TO 19N148W. E TO SE WINDS
20 TO 25 KT FROM 23N TO 26N E OF 143W.
.48 HOUR FORECAST DISSIPATING TROUGH FROM 28N147W TO 24N151W.

.TROUGH FROM 26N160E TO 24N165E MOVING N 10 KT. ISOLATED MODERATE TO
LOCALLY STRONG TSTMS FROM 20N TO 24N BETWEEN 164E AND 168E.
.24 HOUR FORECAST WEAK TROUGH FROM 29N160E TO 28N165E.
.48 HOUR FORECAST TROUGH DISSIPATED. WEAK FRONT FROM 30N174E TO
29N160E.

.SEAS 12 TO 15 FT N OF 26N E OF 150W. SEAS 8 TO 12 FT ELSEWHERE N OF
LINE FROM 22N140W TO 19N150W TO 10N152W TO 03N168W TO 14N170E TO
27N168E TO 27N160E...EXCEPT SEAS 8 FT OR LESS N OF 27N BETWEEN 161W
AND 179E.
.24 HOUR FORECAST SEAS 8 TO 11 FT E OF LINE FROM 30N150W TO 24N163W
TO 22N180W TO 11N180W. SEAS 8 TO 10 FT N OF LINE FROM 11N180E TO
14N160E. SEAS 8 TO 9 FT FROM 08N TO 11N BETWEEN 150W AND 180W.
.48 HOUR FORECAST SEAS 8 TO 11 FT N OF LINE FROM 30N155W TO 17N171W
TO 16N160E. SEAS 8 TO 9 FT FROM 10N TO 23N E OF 150W.

.WINDS 20 KT OR LESS AND SEAS 8 FT OR LESS OVER REST OF FORECAST
AREA.

.ISOLATED MODERATE TSTMS FROM 03N TO 06N W OF 167E...AND FROM 13N TO
17N BETWEEN 176W AND 180W.

.ITCZ FROM 11N140W TO 08N153W TO 09N176W TO 10N164E. ISOLATED
MODERATE TO LOCALLY STRONG TSTMS FROM 06N TO 12N E OF 164E...AND
FROM 12N TO 14N BETWEEN 164E AND 167E.

$$

.FORECASTER KINEL. HONOLULU HI.


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