The High Seas Forecast for the Central North Pacific

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FZPN40 PHFO 191532
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC SUN NOV 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 NOV 19 2017.
24 HOUR FORECAST VALID 1200 UTC NOV 20 2017.
48 HOUR FORECAST VALID 1200 UTC NOV 21 2017.

.WARNINGS.

...GALE WARNING...
.TROUGH FROM 30N171E TO 26N172E TO 21N170E NEARLY STATIONARY. E TO
SE WINDS 25 TO 40 KT N OF A LINE FROM 18N170W TO 18N176W TO 22N178E
TO 30N174E. ISOLATED MODERATE TSTMS WITHIN 90 NM OF A LINE FROM
30N177E TO 20N179W.
.24 HOUR FORECAST TROUGH FROM 30N173E TO 20N177E. E TO SE WINDS 25
TO 35 KT N OF A LINE FROM 21N170W TO 18N175W TO 18N178W TO 21N179E
TO 30N173E.
.48 HOUR FORECAST TROUGH FROM 30N169E TO 19N175E. E TO SE WINDS 20
TO 30 KT N OF A LINE FROM 21N170W TO 18N174W TO 17N180E TO 21N175E
TO 30N169E.

.SYNOPSIS AND FORECAST.

.LOW 26N169E 1011 MB NEARLY STATIONARY.
.24 HOUR FORECAST LOWS DISSIPATED.

.WEAK COLD FRONT FROM 30N146W TO 25N149W TO 21N155W MOVING ESE
20 KT. N TO NE WINDS 20 TO 30 KT N OF A LINE FROM 30N154W TO
26N160W TO 20N167W TO 18N170W. S TO SW WINDS 20 TO 30 KT N OF 25N
E OF 144W.
.24 HOUR FORECAST WEAK FRONT FROM 27N140W TO 23N144W TO 17N152W. S
TO SW WINDS 20 TO 30 KT E OF FRONT N OF 22N. N TO NE WINDS 20 TO 30
KT N OF A LINE FROM 30N151W TO 26N160W TO 24N170W.
.48 HOUR FORECAST WEAK FRONT MOVED E OF AREA. NW TO W WINDS 20 TO
25 KT N OF 25N E OF 149W. N TO NE WINDS 20 TO 25 KT N OF A LINE
FROM 30N150W TO 27N160W TO 21N170W.

.TROUGH FROM 23N146W TO 15N158W TO 07N174W NEARLY STATIONARY.
ISOLATED MODERATE TSTMS WITHIN 150 NM OF TROUGH.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 10N168E TO 01N161E MOVING W 10 KT. NUMEROUS MODERATE
TO STRONG TSTMS S OF 10N W OF 170E.
.24 HOUR FORECAST TROUGH MOVED JUST W OF AREA.

.24 HOUR FORECAST NEW TROUGH FROM 10N177E TO 03N173E.
.48 HOUR FORECAST TROUGH FROM 10N174E TO 02N171E.

.RIDGE FROM 19N140W TO 14N149W NEARLY STATIONARY...AND GRADUALLY
ERODING FROM THE SW.

.RIDGE FROM 30N171W TO 22N165W TO 18N156W NEARLY STATIONARY.

.RIDGE FROM 30N172W TO 19N174E NEARLY STATIONARY.

.RIDGE FROM 30N163E TO 23N160E NEARLY STATIONARY.

.OTHERWISE...WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.

.SEAS 12 TO 17 FT N OF A LINE FROM 30N152W TO 25N156W TO 24N164W TO
30N175W...AND N OF 25N BETWEEN 178W AND 175E. SEAS 8 TO 12 FT
ELSEWHERE N OF A LINE FROM 28N140W TO 17N174W TO 25N174E TO
25N160E.
.24 HOUR FORECAST SEAS 12 TO 16 FT N OF A LINE FROM 30N150W TO
24N152W TO 25N160W TO 28N166W. SEAS 12 TO 15 FT N OF 24N BETWEEN
180E AND 174E. SEAS 8 TO 12 FT ELSEWHERE N OF A LINE FROM 23N140W
TO 15N161W TO 15N176W TO 28N164E TO 24N160E.
.48 HOUR FORECAST SEAS 12 TO 13 FT N OF 22N BETWEEN 178E AND 173E.
SEAS 8 TO 13 FT ELSEWHERE N OF A LINE FROM 25N140W TO 11N163W TO
11N177W TO 25N168E TO 25N160E.

.OTHERWISE...SEAS 8 FT OR LOWER OVER REMAINDER OF FORECAST AREA.

.SCATTERED MODERATE TO STRONG TSTMS N OF 23N E OF 144W...AND FROM
04N TO 10N BETWEEN 174W AND 175E. ISOLATED MODERATE TSTMS WITHIN
240 NM SE OF A LINE FROM 20N140W TO 11N155W.

$$

.FORECASTER HOUSTON. HONOLULU HI.


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