High Seas Forecast
Issued by NWS

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FZPN40 PHFO 211000
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC APR 21 2018.
24 HOUR FORECAST VALID 0600 UTC APR 22 2018.
48 HOUR FORECAST VALID 0600 UTC APR 23 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 06N165E 1006 MB MOVING W SLOWLY. TROUGH FROM 13N167E TO LOW TO
04N160E MOVING W SLOWLY. ISOLATED MODERATE TSTMS WITHIN 240 NM OF
LOW AND TROUGH.
.24 HOUR FORECAST LOW 05N160E 1008 MB. TROUGH FROM LOW TO 13N162E.
.48 HOUR FORECAST LOW AND TROUGH MOVED W OF AREA.

.COLD FRONT W OF AREA MOVING E 10 KT.
.24 HOUR FORECAST FRONT FROM 30N161E TO 28N160E. S WINDS 20 TO 25
KT WITHIN 240 NM E OF FRONT.
.24 HOUR FORECAST FRONT FROM 30N163E TO 24N160E. S TO SE WINDS 20
TO 30 KT WITHIN 420 NM E OF FRONT N OF 28N.
.48 HOUR FORECAST FRONT FROM 30N168E TO 24N160E. WINDS DIMINISHED
TO 20 KT OR LESS.

.NE TO E WINDS 20 TO 25 KT FROM 07N TO 21N E OF 152W...FROM 09N TO
19N BETWEEN 152W AND 160W...AND FROM 13N TO 18N BETWEEN 169W AND
177W.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 09N TO 20N E OF
160W...FROM 11N TO 22N BETWEEN 160W AND 178E...AND FROM 10N TO 17N
W OF 178E.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 09N TO 19N E OF
155W...FROM 11N TO 25N BETWEEN 155W AND 178E...AND FROM 12N TO 17N
W OF 170E.

.HIGH 30N180E 1023 MB NEARLY STATIONARY. RIDGE FROM HIGH TO 28N160E
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 06N E OF 152W...AND FROM 10N TO 18N BETWEEN
152W AND 172W.
.24 HOUR FORECAST SEAS 8 TO 11 FT FROM 08N TO 20N E OF 160W...AND
FROM 10N TO 18N BETWEEN 160W AND 170W. SEAS 8 TO 9 FT FROM 14N TO
20N BETWEEN 170W AND 177E...AND N OF 27N BETWEEN 164W AND 175W.
.48 HOUR FORECAST SEAS 8 TO 10 FT FROM 10N TO 24N BETWEEN 160W AND
174E...AND FROM 07N TO 18N E OF 160W. SEAS 8 TO 9 FT N OF 25N
BETWEEN 151W AND 165W.

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

.ITCZ FROM 05N140W TO 07N165W TO 08N176E. SCATTERED MODERATE TO
STRONG TSTMS WITHIN 300 NM N OF ITCZ W OF 162W. ISOLATED MODERATE
TSTMS WITHIN 270 NM N OF ITCZ E OF 162W...AND WITHIN 240 NM S OF
ITCZ W OF 165W.

$$

.FORECASTER HOUSTON. HONOLULU HI.



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