High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 192235
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC OCT 19 2017.
24 HOUR FORECAST VALID 1800 UTC OCT 20 2017.
48 HOUR FORECAST VALID 1800 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 NE TO E WINDS EASED BELOW GALE FORCE AND
DESCRIBED BELOW.

.SYNOPSIS AND FORECAST.

.ELSEWHERE NE TO E WINDS 20 TO 30 KT FROM 12N TO 27N BETWEEN 150W
AND 180W...AND E WINDS 20 TO 25 KT BETWEEN 25N AND 28N W OF 165E.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 10N TO 25N
BETWEEN 150W AND 170W. E WINDS 20 TO 25 KT FROM 20N TO 27N E OF
150W.
.48 HOUR FORECAST WINDS EASED TO 20 KT OR LESS.

.TROUGH FROM 26N142W TO 16N143W MOVING W SLOWLY. ISOLATED
MODERATE TSTMS FROM 23N TO 26N BETWEEN 142W AND 145W.
.24 HOUR FORECAST TROUGH FROM 25N143W TO 16N145W.
.48 HOUR FORECAST WEAKENING TROUGH FROM 27N147W TO 19N149W.

.SEAS 8 TO 12 FT N OF 10N BETWEEN 150W AND 180E...AND N OF A LINE
FROM 30N140W TO 20N150W. SEAS 8 TO 10 FT S OF 10N BETWEEN 150W
AND 180W. SEAS 8 TO 9 FT N OF 25N W OF 165E.
.24 HOUR FORECAST SEAS 12 TO 15 FT N OF 22N E OF 150W. SEAS 8 TO
12 FT ELSEWHERE N OF LINE FROM 16N140W TO 08N160W TO 08N180W TO
12N165E TO 26N160E.
.48 HOUR FORECAST SEAS 8 TO 10 FT N OF A LINE FROM 10N140W TO
05N160W TO 14N160E.

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

.ISOLATED MODERATE TO LOCALLY STRONG TSTMS FROM 03N TO 14N E OF
170E...AND FROM 22N TO 28N E OF 168E.

.ITCZ FROM 10N140W TO 09N170E. ISOLATED MODERATE TO LOCALLY
STRONG TSTMS WITHIN 300 NM OF ITCZ BETWEEN 165W AND 180W...AND
ELSEWHERE WITHIN 180 NM OF ITCZ.

$$

.FORECASTER MORRISON. HONOLULU HI.



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