High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 191031
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC NOV 19 2017.
24 HOUR FORECAST VALID 0600 UTC NOV 20 2017.
48 HOUR FORECAST VALID 0600 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 19N170W TO 19N177W TO 23N178E
TO 30N174E. ISOLATED MODERATE TSTMS WITHIN 90 NM OF A LINE FROM
30N176E TO 24N179E.
.24 HOUR FORECAST TROUGH FROM 30N172E TO 18N176E. E TO SE WINDS 25
TO 35 KT N OF A LINE FROM 19N170W TO 19N177W TO 22N177E TO 30N172E.
.48 HOUR FORECAST TROUGH FROM 30N169E TO 18N176E. E TO SE WINDS 25
TO 35 KT N OF A LINE FROM 19N170W TO 17N180E TO 22N175E TO 30N169E.

.SYNOPSIS AND FORECAST.

.LOW 26N168E 1010 MB NEARLY STATIONARY.
.24 HOUR FORECAST LOWS DISSIPATED.

.WEAK COLD FRONT FROM 30N147W TO 25N150W TO 21N156W MOVING SE
SLOWLY. N TO NE WINDS 20 TO 30 KT N OF A LINE FROM 30N154W TO
25N160W TO 20N167W TO 19N170W. S TO SW WINDS 20 TO 30 KT N OF 24N
E OF 144W.
.24 HOUR FORECAST WEAK FRONT FROM 30N142W TO 20N147W TO 17N155W. S
TO SW WINDS 20 TO 30 KT E OF FRONT N OF 21N. N TO NE WINDS 20 TO 30
KT N OF A LINE FROM 30N152W TO 25N155W TO 25N170
.48 HOUR FORECAST WEAK FRONT FROM 30N141W TO 22N146W TO 17N151W.
SW WINDS 20 TO 30 KT E OF FRONT N OF 25N. NW WINDS 20 TO 25 KT N OF
26N BETWEEN 146W AND 149W. N TO NE WINDS 20 TO 25 KT N OF A LINE
FROM 30N157W TO 24N164W TO 22N170W.

.TROUGH FROM 21N147W TO 16N153W TO 12N165W TO 07N174W NEARLY
STATIONARY. ISOLATED MODERATE TSTMS WITHIN 150 NM OF TROUGH...N OF
24N E OF 146W...AND WITHIN 90 NM OF A LINE FROM 07N174W TO 05N180E.
.24 HOUR FORECAST TROUGH FROM 19N144W TO 11N151W.
.48 HOUR FORECAST TROUGH FROM 17N141W TO 10N141W.

.TROUGH FROM 09N167E TO 01N161E MOVING W 10 KT. SCATTERED MODERATE
TO STRONG TSTMS S OF 10N W OF 175E.
.24 HOUR FORECAST TROUGH MOVED JUST W OF AREA.

.24 HOUR FORECAST NEW TROUGH FROM 10N179E TO 02N172E.
.48 HOUR FORECAST TROUGH FROM 10N174E TO 02N170E.

.RIDGE FROM 17N140W TO 11N151W NEARLY STATIONARY.

.RIDGE FROM 30N170W TO 22N166W TO 18N157W NEARLY STATIONARY.

.RIDGE FROM 30N172W TO 19N174E NEARLY STATIONARY.

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

.SEAS 12 TO 17 FT N OF A LINE FROM 30N154W TO 27N156W TO 25N162W TO
30N173W. SEAS 12 TO 16 FT N OF 28N BETWEEN 179W AND 175E. SEAS 8 TO
12 FT ELSEWHERE N OF A LINE FROM 30N144W TO 17N174W TO 28N173E TO
22N160E.
.24 HOUR FORECAST SEAS 12 TO 15 FT N OF A LINE FROM 30N150W TO
25N152W TO 24N167W...AND N OF 24N BETWEEN 180E AND 174E. SEAS 8 TO
12 FT ELSEWHERE N OF A LINE FROM 24N144W TO 19N152W TO 16N174W TO
28N160E. SEAS 8 TO 10 FT N OF 21N E OF 143W.
.48 HOUR FORECAST SEAS 12 TO 14 FT N OF 24N BETWEEN 178E AND 173E.
SEAS 12 TO 13 FT N OF 26N BETWEEN 145W AND 156W. SEAS 8 TO 12 FT
ELSEWHERE N OF A LINE FROM 25N140W TO 24N143W TO 12N163W TO 12N176W
TO 21N166E TO 22N160E.

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

.ISOLATED MODERATE TSTMS FROM 03N TO 09 BETWEEN 180E AND 175E...AND
E OF A LINE FROM 20N146W TO 10N157W.

$$

.FORECASTER HOUSTON. HONOLULU HI.


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