High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 191525
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC OCT 19 2017.
24 HOUR FORECAST VALID 1200 UTC OCT 20 2017.
48 HOUR FORECAST VALID 1200 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 151W
AND 175W...AND N OF 14N BETWEEN 174E AND 175W.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 14N TO 25N BETWEEN
150W AND 165W. E WINDS 20 TO 25 KT FROM 16N TO 23N BETWEEN 165W AND
177W.
.48 HOUR FORECAST WINDS EASED TO 20 KT OR LESS.

.TROUGH FROM 29N145W TO 20N143W TO 13N145W MOVING W SLOWLY. ISOLATED
MODERATE TSTMS FROM 23N TO 27N BETWEEN 141W AND 145W.
.24 HOUR FORECAST TROUGH FROM 24N143W TO 14N146W. WINDS 20 TO 25 KT
FROM 22N TO 25N E OF 149W.
.48 HOUR FORECAST WEAKENING TROUGH FROM 26N147W TO 19N148W. E WINDS
20 TO 25 KT FROM 24N TO 27N E OF 147W.

.TROUGH FROM 24N160E TO 22N165E MOVING N 10 KT. E TO SE WINDS 20 TO
25 KT FROM 24N TO 27N W OF 164E. ISOLATED MODERATE TSTMS FROM 17N TO
27N W OF 169E.
.24 HOUR FORECAST TROUGH FROM 27N160E TO 24N165E. ASSOCIATED WINDS
EASED TO 20 KT OR LESS.
.48 HOUR FORECAST WEAK TROUGH FROM 30N161E TO 28N166E.

.24 HOUR FORECAST DISSIPATING FRONT FROM 29N140W TO 27N150W. NE
WINDS 20 TO 25 KT N OF FRONT.
.48 HOUR FORECAST FRONT DISSIPATED. WINDS EASED TO 20 KT OR LESS.

.SEAS 8 TO 12 FT N OF 08N BETWEEN 154W AND 179E. SEAS 8 TO 11 FT N
OF LINE FROM 10N179E TO 25N169E. SEAS 8 TO 9 FT FROM 25N TO 27N W OF
169E...AND S OF 06N BETWEEN 147W AND 164W.
.24 HOUR FORECAST SEAS 12 TO 15 FT N OF 24N E OF 149W. SEAS 8 TO 12
FT ELSEWHERE N OF LINE FROM 23N140W TO 19N151W TO 09N153W TO 09N180E
TO 16N171E...EXCEPT SEAS 8 FT OR LESS N OF 28N BETWEEN 160W AND
179E. SEAS 8 TO 9 FT N OF 28N W OF 167E.
.48 HOUR FORECAST SEAS 8 TO 11 FT E OF LINE FROM 30N150W TO 22N169E
TO 11N176E. SEAS 8 TO 10 FT FROM 08N TO 11N BETWEEN 154W AND 173W.
SEAS 8 TO 9 FT N OF 24N W OF 175W.

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

.ISOLATED MODERATE TSTMS FROM 20N TO 25N BETWEEN 174E AND 180E.

.ITCZ FROM 09N140W TO 10N160W TO 10N175W TO 09N171E. SCATTERED
MODERATE TO STRONG TSTMS FROM 07N TO 12N BETWEEN 164W AND 170W.
ISOLATED MODERATE TO LOCALLY STRONG TSTMS ELSEWHERE FROM 06N TO 13N
BETWEEN 161W AND 179E. ISOLATED MODERATE TSTMS WITHIN 120 NM OF ITCZ
W OF 175E...AND WITHIN 60 NM OF ITCZ E OF 161W.

$$

.FORECASTER KINEL. HONOLULU HI.


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