High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 222146
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC SUN APR 22 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC APR 22 2018.
24 HOUR FORECAST VALID 1800 UTC APR 23 2018.
48 HOUR FORECAST VALID 1800 UTC APR 24 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT 30N165E TO 20160E MOVING E 10 KT.
.24 HOUR FORECAST WEAKENING FRONT FROM 30N170E TO 24N163E.
.48 HOUR FORECAST FRONT WEAKENED TO A TROUGH FROM 30N175E TO
27N172E. E TO NE WINDS 20 TO 25 KT N OF 27N W OF 172E.

.FRONT JUST N OF AREA MOVING SE 10 KT.
.24 HOUR FORECAST FRONT FROM 30N150W TO 27N160W.
.48 HOUR FORECAST FRONT FROM 30N142W TO 26N153W.

.TROUGH FROM 10N177E TO 07N166E MOVING W SLOWLY. ISOLATED MODERATE
TSTMS S OF 12S W OF 167E AND FROM 07N TO 12N BETWEEN 170E AND
177W.
.24 HOUR FORECAST TROUGH FROM 10N175E TO 07S165E DISSIPATING.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 30N153W TO 24N158W MOVING E SLOWLY AND DISSIPATING.
.24 HOUR FORECAST TROUGH DISSIPATED.

.RIDGE FROM 30N177E TO 23N163E MOVING NE 10 KT.

.RIDGE FROM 30N147W TO 28N150W MOVING NE 10 KT.

.NE TO E WINDS 20 TO 25 KT FROM 08N TO 19N E OF 167W AND FROM 10N
TO 24N BETWEEN 167W AND 172E.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 10N TO 22N
BETWEEN 148W AND 162W AND FROM 12N TO 22N BETWEEN 162W AND 172E.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 10N TO 18N E OF
152W AND FROM 10N TO 23N BETWEEN 152W AND 165E.

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

.SEAS 8 TO 10 FT FROM 07N TO 18N E OF 165W AND FROM 10N TO 24N
BETWEEN 165W AND 172E. SEAS 8 TO 9 FT N OF 27N BETWEEN 158W AND
168W.
.24 HOUR FORECAST SEAS 8 TO 10 FT FROM 09N TO 24N BETWEEN 146W
AND 170E. SEAS 8 TO 9 FT N OF 20N BETWEEN 146W AND 163W.
.48 HOUR FORECAST SEAS MAINLY 8 TO 10 FT FROM 10N TO 23N E OF
165E AND N OF 26N E OF 155W.

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

.ITCZ FROM 06N140W TO 07N155W TO 06N166W. SCATTERED MODERATE TO
STRONG TSTMS WITHIN 180 NM N OF ITCZ E OF 148W. ISOLATED MODERATE
TSTMS ELSEWHERE WITHIN 120 NM OF ITCZ.

$$

.FORECASTER BURKE. HONOLULU HI.


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