High Seas Forecast
Issued by NWS

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453
FZPN40 PHFO 231501
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC WED OCT 23 2019

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 OCT 23 2019.
24 HOUR FORECAST VALID 1200 UTC OCT 24 2019.
48 HOUR FORECAST VALID 1200 UTC OCT 25 2019.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 10N146W 1007 MB MOVING WNW 10 KT. WINDS 20 TO 25 KT FROM 10N
TO 14N BETWEEN 143W AND 149W. SCATTERED MODERATE TO STRONG TSTMS
WITHIN 150 NM OF LOW.
.24 HOUR FORECAST LOW 12N150W 1007 MB. WINDS 20 TO 25 KT WITHIN
180 NM N AND NE QUADRANTS OF LOW.
.48 HOUR FORECAST LOW 14N153W 1008 MB. WINDS 20 TO 25 KT WITHIN
180 NM N AND NE QUADRANTS OF LOW.

.FRONT FROM 30N167W TO 24N180E TO 22N160E MOVING ESE 10 KT. ALSO...
TROUGH FROM 30N172W TO 27N178E TO 25N164E MOVING ESE 15 KT. NE
WINDS 20 TO 30 KT N OF TROUGH. ISOLATED MODERATE TSTMS WITHIN 90 NM
SE OF FRONT E OF 171W.
.24 HOUR FORECAST NEW LOW 30N162W 1014 MB. FRONT FROM LOW TO
27N164W TO 23N175W TO 21N176E. TROUGH MERGED WITH FRONT. NE TO E
WINDS 20 TO 30 KT N OF FRONT.
.48 HOUR FORECAST LOW MOVED FAR N OF AREA. FRONT FROM 30N158W TO
27N160W TO 24N171W TO 23N178E. WINDS DIMINISHED TO 20 KT OR LESS.

.TROUGH FROM 21N178E TO 14N172E MOVING W 10 KT. ISOLATED MODERATE
TSTMS WITHIN 120 NM OF TROUGH S OF 19N.
.24 HOUR FORECAST DISSIPATING TROUGH FROM 19N168E TO 12N166E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 27N170W TO 20N174W MOVING NW SLOWLY. ISOLATED MODERATE
TSTMS WITHIN 150 NM E OF TROUGH.
.24 HOUR FORECAST TROUGH DISSIPATED.

.E WINDS 20 TO 25 KT FROM 16N TO 19N BETWEEN 151W AND 161W.
.24 HOUR FORECAST WINDS DIMINISHED TO 20 KT OR LESS.

.24 HOUR FORECAST NEW FRONT JUST NW OF AREA.
.48 HOUR FORECAST FRONT FROM 30N172E TO 29N160E. NE TO E WINDS 20 TO
25 KT N OF FRONT.

.RIDGE FROM 30N157W TO 26N168W MOVING E SLOWLY...AND GRADUALLY
ERODING FROM THE W.

.RIDGE FROM 30N163E TO 28N160E MOVING E 10 KT.

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

.SEAS 8 TO 11 FT N OF 26N BETWEEN 170W AND 164E. SEAS 8 TO 9 FT
FROM 10N TO 16N BETWEEN 143W AND 148W.
.24 HOUR FORECAST SEAS 12 TO 13 FT N OF A LINE FROM 30N163W TO
28N168W TO 27N173W. SEAS 8 TO 12 FT ELSEWHERE N OF A LINE FROM
30N160W TO 24N170W TO 22N180E TO 22N171E.
.48 HOUR FORECAST SEAS 8 TO 11 FT N OF A LINE FROM 30N151W TO
24N158W TO 22N170W TO 22N176W.

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

.ISOLATED MODERATE TSTMS FROM 02N TO 12N W OF 174E...AND WITHIN 90
NM OF A POINT 18N162W.

.ITCZ FROM 10N140W TO 10N144W...AND FROM 09N149W TO 08N165W TO
06N174E. SCATTERED MODERATE TO LOCALLY STRONG TSTMS FROM 06N TO 13N
E OF 144W...FROM 04N TO 13N BETWEEN 155W AND 172W...AND WITHIN 150
NM N OF ITCZ W OF 172W.

$$

.FORECASTER HOUSTON. HONOLULU HI.



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