High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 251021
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 UTC MON JUL 25 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC JUL 25 2016.
24 HOUR FORECAST VALID 0600 UTC JUL 26 2016.
48 HOUR FORECAST VALID 0600 UTC JUL 27 2016.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM DARBY NEAR 22.0N 159.0W 1009 MB MOVING NW 10 KT.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. WINDS 34 KT OR GREATER
WITHIN 60NM NE...50 NM SE...0 NM SW...AND 30 NM NW QUADRANTS. SEAS
12 FT OR HIGHER WITHIN 80 NM N SEMICIRCLE. WINDS 20 TO 33 KT
ELSEWHERE WITHIN 210 NM NE QUADRANT...AND 180 NM NW QUADRANT. SEAS
8 TO 12 FT ELSEWHERE WITHIN 210 NM N SEMICIRCLE. SCATTERED
MODERATE TO STRONG TSTMS WITHIN 210 NM NE QUADRANT.
.24 HOUR FORECAST TROPICAL DEPRESSION DARBY NEAR 24.4N 161.7W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WINDS 20 TO 30 KT
WITHIN 120 NM N SEMICIRCLE. SEAS 8 TO 9 FT WITHIN 90 NM N
SEMICIRCLE.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW NEAR 27.1N 164.4W.
MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. WINDS 20 TO 25 KT
WITHIN 60 NM N SEMICIRCLE. SEAS DIMINISHED TO 8 FT OR LOWER.
.72 HOUR FORECAST LOW DISSIPATED.

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

.SYNOPSIS AND FORECAST.

.TROUGH FROM 28N172E TO 20N169E MOVING W SLOWLY. SE WINDS 20 TO 25
KT WITHIN 300 NM E OF TROUGH. SCATTERED MODERATE TO STRONG TSTMS
WITHIN 300 NM E OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 30N168E TO 23N169E TO 21N166E. SE
WINDS 20 TO 30 KT WITHIN 240 NM E OF TROUGH N OF 25N.
.48 HOUR FORECAST TROUGH FROM 30N165E TO 26N166E TO 21N164E.
WINDS DIMINISHED TO 20 KT OR LESS.

.WEAK TROUGH FROM 27N148W TO 22N147W MOVING WNW 10 KT.
.24 HOUR FORECAST WEAK TROUGH FROM 29N152W TO 25N152W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.RIDGE FROM 30N148W TO 23N152W NEARLY STATIONARY.

.RIDGE FROM 30N167E TO 24N161E NEARLY STATIONARY.

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

.EXCEPT FOR SEAS ASSOCIATED WITH T.S. DARBY...SEAS 8 TO 10 FT N OF
25N BETWEEN 180E AND 173E.
.48 HOUR FORECAST EXCEPT FOR SEAS ASSOCIATED WITH T.D. DARBY...SEAS
8 TO 10 FT N OF 24N BETWEEN 180E AND 173E.
.48 HOUR FORECAST SEAS 8 FT OR LOWER...EXCEPT FOR WINDS ASSOCIATED
WITH TROPICAL DEPRESSION DARBY.

.OTHERWISE...SEAS 20 KT OR LOWER OVER REMAINDER OF FORECAST AREA.

.ISOLATED MODERATE TSTMS FROM 08N TO 14N BETWEEN 160W AND 178E...
AND FROM 03N TO 07N BETWEEN 180E AND 171E.

.ITCZ FROM 10N140W TO 08N150W. ISOLATED MODERATE TO STRONG TSTMS
WITHIN 180 NM OF ITCZ.

$$

.FORECASTER HOUSTON. HONOLULU HI.


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