High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 211533
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC SAT APR 21 2018

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 APR 21 2018.
24 HOUR FORECAST VALID 1200 UTC APR 22 2018.
48 HOUR FORECAST VALID 1200 UTC APR 23 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 06N164E 1008 MB MOVING W SLOWLY. TROUGH FROM 11N164E TO LOW TO
04N160E MOVING W SLOWLY. SCATTERED MODERATE TO LOCALLY STRONG TSTMS
S OF 11N W OF 171E.
.24 HOUR FORECAST LOW MOVED JUST W OF AREA. TROUGH FROM LOW TO
08N160E TO 12N162E.
.48 HOUR FORECAST TROUGH MOVED FAR W OF AREA.

.COLD FRONT W OF AREA MOVING E 10 KT. S WINDS 20 TO 25 KT N OF 28N
W OF 162E.
.24 HOUR FORECAST FRONT FROM 30N162E TO 23N160E. S TO SE WINDS 20
TO 30 KT WITHIN 420 NM E OF FRONT N OF 28N.
.48 HOUR FORECAST WEAKENING FRONT FROM 30N169E TO 25N163E. WINDS
DIMINISHED TO 20 KT OR LESS.

.TROUGH FROM 05N180E TO 12N177W MOVING W 10 KT. SCATTERED MODERATE
TO LOCALLY STRONG TSTMS WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 06N175E TO 12N177E.
.48 HOUR FORECAST TROUGH FROM 07N171E TO 11N173E.

.NE TO E WINDS 20 TO 25 KT FROM 07N TO 20N E OF 152W...FROM 09N TO
18N BETWEEN 152W AND 162W...AND FROM 13N TO 21N BETWEEN 162W AND
178E.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 08N TO 19N E OF
160W...FROM 12N TO 23N BETWEEN 160W AND 170E...AND FROM 12N TO 18N
W OF 170E.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 09N TO 18N E OF
160W...FROM 12N TO 24N BETWEEN 160W AND 178E...AND FROM 13N TO 18N
W OF 172E.

.HIGH JUST N OF AREA 31N176W 1024 MB NEARLY STATIONARY. RIDGE FROM
HIGH TO 30N180E TO 27N160E NEARLY STATIONARY.
.24 HOUR FORECAST HIGH DISSIPATED.

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

.SEAS 8 TO 10 FT N OF 05N E OF 153W...AND FROM 09N TO 18N BETWEEN
153W AND 179E.
.24 HOUR FORECAST SEAS 8 TO 11 FT FROM 08N TO 19N BETWEEN 155W AND
167W. SEAS 8 TO 10 FT FROM 06N TO 20N E OF 155W...AND FROM 13N TO
23N BETWEEN 167W AND 173E. SEAS 8 TO 9 FT N OF 27N BETWEEN 160W AND
172W...AND FROM 13N TO 17N W OF 166E.
.48 HOUR FORECAST SEAS 8 TO 10 FT FROM 10N TO 25N BETWEEN 160W AND
172E...AND FROM 07N TO 18N E OF 160W. SEAS 8 TO 9 FT N OF 25N
BETWEEN 148W AND 166W...AND FROM 13N TO 17N W OF 163E.

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

.ITCZ FROM 06N140W TO 05N155W TO 06N174W. SCATTERED MODERATE TO
LOCALLY STRONG TSTMS WITHIN 540 NM N OF ITCZ.

$$

.FORECASTER HOUSTON. HONOLULU HI.


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