High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 190323
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC SAT AUG 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 19 2017.
24 HOUR FORECAST VALID 0000 UTC AUG 20 2017.
48 HOUR FORECAST VALID 0000 UTC AUG 21 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 13N150W 1007 MB NEARLY STATIONARY. WINDS 20 TO 25 KT WITHIN
120 NM N OF LOW. ISOLATED MODERATE TSTMS WITHIN 150 NM OF LOW.
.24 HOUR FORECAST LOW 13N151W 1009 MB DISSIPATING. WINDS
DIMINISHED TO 20 KT OR LESS.
.48 HOUR FORECAST LOW DISSIPATED TO A TROUGH FROM 15N152W TO
11S153W.

.TROUGH FROM 17N172W TO 09N175W MOVING W 10 KT. WINDS 20 TO 25 KT
WITHIN 120 NM OF TROUGH N OF 14N. ISOLATED MODERATE TSTMS WITHIN
90 NM OF TROUGH N OF 13N.
.24 HOUR FORECAST TROUGH FROM 16N178W TO 09N179W. WINDS
DIMINISHED TO 20 KT OR LESS.
.48 HOUR FORECAST TROUGH FROM 16N176E TO 11N175E.

.TROUGH FROM 21N142W TO 16N142W MOVING E SLOWLY AND DISSIPATING.
.24 HOUR FORECAST TROUGH DISSIPATED.

.RIDGE FROM 30N171E TO 28N160E NEARLY STATIONARY.

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

.SEAS 8 FT OR LESS OVER ENTIRE FORECAST AREA.

.MONSOON TROUGH FROM 13N148W TO 13N140W. ISOLATED MODERATE TSTMS
FROM 08N TO 13N E OF 148W.

.ITCZ FROM 10N152W TO 09N160W TO 09N170W AND FROM 09N180E TO
08N170E TO 08N160E. ISOLATED MODERATE TSTMS WITHIN 120 NM S OF
ITCZ E OF 162W AND WITHIN 180 NM OF ITCZ W OF 180E.

.ISOLATED MODERATE TSTMS S OF 04N W OF 165E.

$$

.FORECASTER BURKE. HONOLULU HI.


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