High Seas Forecast
Issued by NWS

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FZPN40 PHFO 261531 CCA
HSFNP

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROPICAL DEPRESSION GREG 18.0N 140.5W 1006 MB MOVING W 10 KT.
MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. WINDS 20 TO 25 KT
WITHIN 180 NM NE SEMICIRCLE. SEE SEAS DESCRIBED BELOW.
.24 HOUR FORECAST POST-TROPICAL REMNANT LOW GREG 18.5N 144.0W.
WINDS 20 TO 25 KT WITHIN 180 NM N QUADRANT OF LOW. SEE SEAS
BELOW.
.48 HOUR FORECAST LOW DISSIPATED. WINDS DIMINISHED TO 20
KT OR LESS.

SEE NHC ADVISORY.
FORECAST WINDS AROUND TROPICAL CYCLONES SHOULD BE USED WITH
CAUTION DUE TO FORECAST UNCERTAINTY.

.LOW 23N173E 1008 MB MOVING NE 10 KT. TROUGH 30N177E THROUGH LOW
TO 25N160E. WINDS 20 TO 25 KT WITHIN 150 NM OF LOW E QUADRANT AND
NW OF LINE 30N165E 20N160E. SEAS 8 TO 12 FT N OF 20N W OF 170E.
SCATTERED STRONG TSTMS WITHIN 240 NM E OF LOW. ISOLATED MODERATE
TSTMS N OF 38N BETWEEN 178W AND 176E AND FROM 28N TO 23N W OF 165E.

.24 HOUR FORECAST LOW 27N175E 1010 MB. TROUGH 30N174E THROUGH LOW
TO  24N170E 27N160E. WINDS 20 TO 30 KT N OF 23N BETWEEN 180W AND
176E. SEAS 8 TO 12 FT N OF 23N BETWEEN 180W AND 174E...SEAS 8 TO
9 FT W OF LINE 30N164E 25N164E 22N160E.
.48 HOUR FORECAST LOW DISSIPATED. NEW LOW 28N167E 1009 MB. TROUGH
30N172E THROUGH LOW TO 27N160E. WINDS 20 TO 30 KT WITHIN 240 NM OF
LOW SE SEMICIRCLE. SEAS 8 TO 12 FT N OF 24N BETWEEN 170E AND
163E...SEAS 8 TO 9 FT N OF LINE 30N180W 28N178E 30N175E.

.ITCZ 10N150W 05N165E. ISOLATED MODERATE TSTMS WITHIN 150 NM OF
ITCZ.

.RIDGE 20N180W 16N160E NEARLY STATIONARY.

.SEAS 8 TO 9 FT FROM 20N TO 10N E OF 156W.
.24 HOUR FORECAST SEAS 8 TO 9 FT FROM 16N TO 09N BETWEEN 150W
AND 165W.
.48 HOUR FORECAST SEAS 8 TO 10 FT FROM 10N TO 16N BETWEEN 151W
AND 163W...AND E OF 143W BETWEEN 17N AND 21N.

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

.ISOLATED STRONG TSTMS FROM 27N TO 22N BETWEEN 165W AND 169W.

$$
.HONOLULU FORECASTER.


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