High Seas Forecast
Issued by NWS

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876
FZPN40 PHFO 232205
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC SUN JUL 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC JUL 23 2017.
24 HOUR FORECAST VALID 1800 UTC JUL 24 2017.
48 HOUR FORECAST VALID 1800 UTC JUL 25 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 20N151W 1012 MB MOVING W 10 KT AND DISSIPATING. TROUGH FROM
23N151W TO LOW TO 17N151W MOVING W 10 KT. WINDS 20 TO 25 KT FT FROM
20N TO 25N BETWEEN 148W AND 151W.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 23N157W TO 18N158W.
WINDS 20 TO 25 KT FT FROM 22N TO 25N BETWEEN 155W AND 158W.
.48 HOUR FORECAST TROUGH FROM 28N162W TO 25N163W TO 21N165W.
ASSOCIATED WINDS DIMINISHED TO 20 KT OR LESS.

.TROUGH FROM 25N165W TO 20N166W TO 17N167W MOVING W 10 KT. ISOLATED
MODERATE TSTMS FROM 19N TO 20N BETWEEN 163W AND 166W.
.24 HOUR FORECAST TROUGH FROM 26N170W TO 21N171W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 12N174E TO 03N168E MOVING W 15 KT. ISOLATED MODERATE
TSTMS FROM 03N TO 08N BETWEEN 1763 AND 167E.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TYPHOON NORU W OF AREA DRIFTING E.
.24 HOUR FORECAST TYPHOON NORU W OF AREA. ASSOCIATED WINDS 20 TO
25 KT FROM 22N TO 25N W OF 162E.
.48 HOUR FORECAST TYPHOON NORU W OF AREA. ASSOCIATED WINDS 20 TO
30 KT N OF 21N W OF 163E.

.TROUGH FROM 28N160E TO 30N162E. SCATTERED STRONG TSTMS FROM
22N TO 25N W OF 163E.
.24 HOUR FORECAST TROUGH FROM 26N160E TO 24N169E TO 30N177E.
.48 HOUR FORECAST TROUGH FROM 27N160E TO 25N171E TO 30N178E.

.RIDGE FROM 30N169W TO 21N178E TO 17N160E NEARLY STATIONARY.

.SEAS 8 TO 9 FT NW OF A LINE FROM 30N163E TO 27N160E...AND S OF 03N
BETWEEN 162W AND 170W.
.24 HOUR FORECAST SEAS 8 TO 12 FT FROM 21N TO 28N W OF 162E. SEAS
8 TO 9 FT FROM 14N TO 22N E OF 143W.
.48 HOUR FORECAST SEAS 12 TO 18 FT NW OF A LINE FROM 30N164E TO
24N160E. SEAS 8 TO 12 FT ELSEWHERE N OF 18N W OF 168E. SEAS TO 9 FT
FROM 11N TO 18N E OF 143W.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS 8 FT OR LESS.

.ITCZ FROM 06N140W TO 05N152W TO 07N167W TO 03N178E. SCATTERED
MODERATE TSTMS WITHIN 210 NM N OF ITCZ BETWEEN 154W AND 166W...
AND WITHIN 360 NM N OF ITCZ W OF 177E. ISOLATED MODERATE TSTMS
WITHIN 120 NM N OF ITCZ BETWEEN 177W AND 166W.

.SCATTERED MODERATE TO STRONG TSTMS FROM 20N TO 25N BETWEEN
177E AND 168E...AND FROM 21N TO 24N BETWEEN 160W AND 163W.
ISOLATED MODERATE TSTMS WITHIN 90 NM OF A LINE FROM 29N179E TO
20N177W...S OF 03N BETWEEN 170W AND 179E...S OF 06N W OF 165E...
AND FROM 10N TO 12N BETWEEN 167E AND 165E.

$$

.FORECASTER BIRCHARD. HONOLULU HI.



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