High Seas Forecast
Issued by NWS

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FZPN40 PHFO 231528
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC FRI FEB 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 FEB 23 2018.
24 HOUR FORECAST VALID 1200 UTC FEB 24 2018.
48 HOUR FORECAST VALID 1200 UTC FEB 25 2018.

.WARNINGS.

...GALE WARNING...
.TROUGH FROM 30N171W TO 23N166W TO 10N168W MOVING W SLOWLY. E TO SE
WINDS 20 TO 30 KT N OF A LINE FROM 11N140W TO 14N150W TO 17N161W.
ISOLATED MODERATE TSTMS WITHIN 150 NM E OF TROUGH FROM 21N TO
27N...WITHIN 180 NM E OF TROUGH S OF 17N...AND N OF 13N BETWEEN
150W AND 163W.
.24 HOUR FORECAST TROUGH FROM 30N170W TO 22N167W TO 11N169W. E TO
SE WINDS 30 TO 35 KT N OF 25N BETWEEN 156W AND 161W. E TO SE WINDS
20 TO 30 KT ELSEWHERE N OF A LINE FROM 08N140W TO 08N150W TO
18N160W TO 30N166W.
.48 HOUR FORECAST NEW LOW 28N168W 1015 MB. TROUGH FROM 30N169W TO
LOW TO 22N168W TO 16N168W. E TO SE WINDS 25 TO 40 KT N OF 24N
BETWEEN 156W AND 165W. E TO SE WINDS 20 TO 30 KT ELSEWHERE N OF A
LINE FROM 10N140W TO 10N152W TO 17N160W TO 30N166W.

.SYNOPSIS AND FORECAST.

.NE TO E WINDS 20 TO 25 KT FROM 06N TO 20N W OF 179W.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 06N TO 17N W OF
178E.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 06N TO 16N W OF
172E.

.24 HOUR FORECAST NEW FRONT FROM 30N164E TO 28N160E.
.48 HOUR FORECAST FRONT FROM 30N170E TO 27N160E.

.24 HOUR FORECAST NEW TROUGH FROM 30N177W TO 24N178W.
.48 HOUR FORECAST TROUGH FROM 30N179E TO 23N178W.

.RIDGE FROM 30N171E TO 28N160E MOVING NNE SLOWLY.

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

.SEAS 8 TO 11 FT N OF A LINE FROM 06N140W TO 16N163W. SEAS 8 TO 9 FT
FROM 07N TO 18N W OF 180E.
.24 HOUR FORECAST SEAS 8 TO 12 FT FROM 06N TO 28N E OF 152W. SEAS 8
TO 11 FT N OF 07N BETWEEN 152W AND 161W. SEAS 8 TO 9 FT FROM 07N TO
16N W OF 177E.
.48 HOUR FORECAST SEAS 8 TO 12 FT N OF A LINE FROM 05N151W TO
10N160W TO 30N168W. SEAS 8 TO 11 FT FROM 05N TO 27N E OF 151W. SEAS
8 TO 9 FT FROM 11N TO 16N W OF 168E.

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

.ISOLATED MODERATE TSTMS WITHIN 60 NM OF A POINT 06N168E.

.ITCZ FROM 07N140W TO 08N160W. ISOLATED MODERATE TSTMS WITHIN 330
NM N OF ITCZ E OF 147W...AND WITHIN 60 NM OF ITCZ W OF 155W.

$$

.FORECASTER HOUSTON. HONOLULU HI.



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