High Seas Forecast
Issued by NWS

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825
FZPN40 PHFO 261601 CCA
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC TUE SEP 26 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC SEP 26 2017.
24 HOUR FORECAST VALID 1200 UTC SEP 27 2017.
48 HOUR FORECAST VALID 1200 UTC SEP 28 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 1010 MB 11N145W NEARLY STATIONARY. TROUGH 11N140W THROUGH LOW TO
09N155W 11N163W. ISOLATED STRONG TSTMS WITHIN 120 NM OF TROUGH.
.24 HOUR FORECAST LOW DISSIPATED.


.COLD FRONT 30N161W 28N165W 27N171W MOVING ESE 15 KT.
.24 HOUR FORECAST FRONT 30N157W 27N163W 25N170W.
.48 HOUR FORECAST FRONT 30N150W 28N156W 24N169W.

.COLD FRONT JUST W OF AREA. WINDS  SW 20 TO 30 KT N OF 27N W OF
172E. SEAS 8 TO 10 FT NW OF LINE 30N164E 28N160E. ISOLATED
MODERATE TO STRONG TSTMS NW OF A LINE FROM 30N162E TO 28N160E.
.24 HOUR FORECAST FRONT 30N164E 28N160E. WINDS SW 20 TO 25 KT N
OF 29N BETWEEN 165E AND 175E. SEAS 8 TO 11 FT NW OF LINE FROM
30N170E 28N160E.
.48 HOUR FORECAST FRONT 30N174E 28N168E 26N160E. WINDS DIMINISHED
TO 20 KT OR LESS. SEAS SUBSIDED TO LESS THAN 8 FT.

.TROUGH 18N150W 21N154W 25N155W MOVING NNW SLOWLY.
.24 HOUR FORECAST TROUGH DISSIPATED.

.HIGH 26N179W 1017 MB MOVING ENE 15 KT. RIDGE 21N166W THROUGH
HIGHT TO 21N160E.
.24 HOUR FORECAST HIGH 28N177W 1018 MB.
.48 HOUR FORECAST HIGH 28N172W 1018 MB.

.RIDGE 30N143W 26N151W MOVING NE SLOWLY.

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

.ITCZ 12N172W 10N179E 12N169E 11N160E. SCATTERED MODERATE TO
STRONG TSTMS WITHIN 360 NM EITHER SIDE OF ITCZ BETWEEN 163W AND
177W. ISOLATED MODERATE TSTMS WITHIN 240 NM EITHER SIDE OF ITCZ W
OF 177W.

$$
.HONOLULU FORECASTERS.



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