High Seas Forecast
Issued by NWS

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848
FZPN40 PHFO 231503
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC TUE JUL 23 2019

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS
TO 15N166W MOVING WNW SLOWLY. WINDS 20 TO 30 KT WITHIN 300 NM N AND
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 JUL 23 2019.
24 HOUR FORECAST VALID 1200 UTC JUL 24 2019.
48 HOUR FORECAST VALID 1200 UTC JUL 25 2019.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 17N165W 1010 MB MOVING WNW SLOWLY. TROUGH FROM 23N164W TO LOW
TO 15N166W MOVING WNW SLOWLY. WINDS 20 TO 30 KT WITHIN 300 NM N AND
NE QUADRANTS OF LOW. ISOLATED MODERATE TSTMS WITHIN 300 NM E OF LOW
AND TROUGH.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 23N167W TO 15N170W.
WINDS 20 TO 25 KT FROM 20N TO 24N BETWEEN 162W TO 165W.
.48 HOUR FORECAST WEAKENING TROUGH FROM 25N168W TO 18N170W. WINDS
DIMINISHED TO 20 KT OR LESS.

.TROUGH FROM 20N143W TO 14N143W MOVING W 15 KT. ISOLATED MODERATE
TSTMS WITHIN 60 NM OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 19N150W TO 12N150W.
.48 HOUR FORECAST TROUGH FROM 18N156W TO 12N156W.

.TROUGH FROM 19N176W TO 12N174E MOVING W 15 KT. SCATTERED MODERATE
TO STRONG TSTMS WITHIN 150 NM OF A LINE FROM 20N177E TO 10N179W.
.24 HOUR FORECAST TROUGH DISSIPATED.

.NE TO E WINDS 20 TO 25 KT FROM 15N TO 27N E OF 152W...AND E TO SE
WINDS 20 TO 25 KT N OF 16N BETWEEN 150W AND 157W.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 14N TO 29N BETWEEN
145W AND 154W...AND FROM 14N TO 20N BETWEEN 154W AND 160W. E TO SE
WINDS 20 TO 25 KT N OF 23N BETWEEN 154W AND 160W.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 14N TO 19N BETWEEN
153W AND 160W.

.RIDGE FROM 30N171E TO 23N160E MOVING WNW 10 KT.

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

.SEAS 8 TO 9 FT FROM 15N TO 21N E OF 147W.
.24 HOUR FORECAST SEAS 8 TO 9 FT FROM 14N TO 21N BETWEEN 145W AND
153W.
.48 HOUR FORECAST SEAS 8 TO 9 FT FROM 14N TO 19N BETWEEN 150W AND
158W.

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

.ISOLATED MODERATE TSTMS FROM 20N TO 25N BETWEEN 180E AND 172E...
AND S OF 11N W OF 173E.

.ITCZ FROM 06N140W TO 07N155W TO 07N175W. SCATTERED MODERATE TO
LOCALLY STRONG TSTMS WITHIN 120 NM OF ITCZ BETWEEN 150W AND 161W...
WITHIN 90 NM OF ITCZ BETWEEN 163W AND 168W...AND FROM 02N TO 09N
BETWEEN 168W AND 175W.

$$

.FORECASTER HOUSTON. HONOLULU HI.



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