High Seas Forecast
Issued by NWS

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FZPN40 PHFO 231519
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC SAT JUL 23 2016

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 23 2016.
24 HOUR FORECAST VALID 1200 UTC JUL 24 2016.
48 HOUR FORECAST VALID 1200 UTC JUL 25 2016.

.WARNINGS.

...TROPICAL STORM WARNING...

.TROPICAL STORM DARBY 18.7N 153.5W 1000 MB MOVING W 8 KT. MAXIMUM
SUSTAINED WINDS 45 KT GUSTS 55 KT. WINDS 34 KT OR GREATER WITHIN 110
NM N SEMICIRCLE...80 NM SE QUADRANT...40 NM SW QUADRANT. SEAS 12 FT
OR HIGHER WITHIN 310 NM NW QUADRANT...270 NM NE QUADRANT AND 120 NM
S SEMICIRCLE. WINDS 20 TO 33 KT ELSEWHERE WITHIN 100 NM OF CENTER.
SCATTERED MODERATE TSTMS WITHIN 150 NM OF CENTER SW QUADRANT.
.24 HOUR FORECAST TROPICAL STORM DARBY 19.8N 155.7W. MAXIMUM
SUSTAINED WINDS 40 KT GUSTS 50 KT. WINDS 34 KT OR GREATER WITHIN 80
NM N SEMICIRCLE AND 35 NM S SEMICIRCLE. SEAS 12 FT OR HIGHER WITHIN
240 NM N SEMICIRCLE AND 90 NM S SEMICIRCLE. WINDS 20 TO 33 KT
ELSEWHERE WITHIN 90 NM OF CENTER.
.48 HOUR FORECAST TROPICAL STORM DARBY 22.0N 159.0W. MAXIMUM
SUSTAINED WINDS 35 KT GUSTS 50 KT. WINDS 34 KT OR GREATER WITHIN 40
NM N SEMICIRCLE AND 10 NM S SEMICIRCLE. SEAS 12 FT OR HIGHER WITHIN
150 NM N SEMICIRCLE AND 30 NM S SEMICIRCLE. WINDS 20 TO 33 KT
ELSEWHERE WITHIN 75 NM OF CENTER.
.72 HOUR FORECAST TROPICAL STORM DARBY NEAR 24.8N 162.1W. MAXIMUM
SUSTAINED WINDS 35 KT GUSTS 45 KT.
.96 HOUR FORECAST TROPICAL DEPRESSION DARBY NEAR 28.2N 164.9W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.120 HOUR FORECAST TROPICAL DEPRESSION DARBY NEAR 32.7N 167.0W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.

FORECAST WINDS NEAR ACTIVE TROPICAL CYCLONES SHOULD BE USED WITH
CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE AND INTENSITY.

.SYNOPSIS AND FORECAST.

.TROUGH 29N170E 23N170E NEARLY STATIONARY.
.24 HOUR FORECAST NEW LOW 24N170E 1011 MB. TROUGH 30N175E THROUGH
LOW TO 19N169E. SE WINDS 20 TO 25 KT N OF LINE 30N179W 26N180W
30N177E.
.48 HOUR FORECAST LOW 25N170E 1010 MB. TROUGH 30N169E THROUGH LOW TO
20N166E. SE WINDS 20 TO 25 KT N OF LINE 30N177E 24N173E 30N170E.

.TROUGH 29N180W 24N178E MOVING W 10KT. SE WINDS 20 TO 25 KT N OF 28N
BETWEEN 174W AND 177W. ISOLATED MODERATE TSTMS WITHIN 150 NM OF LINE
30N177W 25N177W 22N170E.
.24 HOUR FORECAST TROUGH MERGED WITH LOW AND TROUGH DESCRIBED ABOVE.

.TROUGH JUST W OF AREA. S WINDS 20 TO 25 KT NW OF LINE 30N162E
27N160E.
.24 HOUR FORECAST WINDS DIMINISHED TO 20 KT OR LESS.

.TROUGH 30N152W 26N151W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH DISSIPATED.

.24 HOUR FORECAST NEW TROUGH 27N142W 21N142W. E WINDS 20 TO 25 KT
FROM 27N TO 24N W OF 143W.
.48 HOUR FORECAST TROUGH DISSIPATED. WINDS DIMINISHED TO 20 KT OR
LESS.

.RIDGE 30N168E 25N164E 21N160E MOVING NW SLOWLY.

.EXCEPT FOR SEAS ASSOCIATED WITH T.S. DARBY... SEAS 8 TO 12 FT
BOUNDED BY 30N180W 30N170W 10N155W 30N180W. SEAS 8 TO 9 FT NW OF
LINE 30N163E 28N160E.
.24 HOUR FORECAST...EXCEPT FOR SEAS ASSOCIATED WITH T.S.DARBY...SEAS
8 TO 12 FT BOUNDED BY 25N155W 20N150W 18N153W 23N160W 25N155W. SEAS
8 TO 12 FT NW OF LINE 30N163E 26N160E. SEAS 8 TO 9 FT FROM 28N TO
25N E OF 144W AND BOUNDED BY 30N176E 30N175E 22N168W 21N173W 30N175E.
.48 HOUR FORECAST...EXCEPT FOR SEAS ASSOCIATED WITH T.S.DARBY...SEAS
8 TO 12 FT FROM 27N TO 20N BETWEEN 155W AND 160W. SEAS 8 TO 10 FT N
OF 24N BETWEEN 180W AND 170E.

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

.ISOLATED MODERATE TSTMS BOUNDED BY 10N180W 10N148W 03N174W 10N180W.

$$
.HONOLULU HI.



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