High Seas Forecast
Issued by NWS

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FZPN40 PHFO 272252
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC SAT AUG 27 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

PAN PAN

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 1800 UTC AUG 27 2016.
24 HOUR FORECAST VALID 1800 UTC AUG 28 2016.
48 HOUR FORECAST VALID 1800 UTC AUG 29 2016.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM MADELINE JUST E OF FORECAST AREA NEAR 15.5N
139.0W 997 MB MOVING NW 09 KT. MAXIMUM SUSTAINED WINDS 50 KT
GUSTS 60 KT. WINDS 34 KT OR GREATER AND SEAS 12 FT OR GREATER WITHIN
60 NM N SEMICIRCLE AND 30 NM S SEMICIRCLE. WINDS 20 TO 33 KT AND
SEAS 8 TO 12 FT WITHIN 150 NM N SEMICIRCLE AND 60 NM S SEMICIRCLE.
SCATTERED MODERATE TO STRONG TSTMS WITHIN 180 NM OF CENTER.

.24 HOUR FORECAST HURRICANE MADELINE 17.3N 141.5W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT. WINDS 34 KT OR GREATER AND SEAS
12 FT OR GREATER WITHIN 80 NM N SEMICIRCLE AND 50 NM S SEMICIRCLE. WINDS
20 TO 33 KT AND SEAS 8 TO 12 FT ELSEWHERE WITHIN 180 NM N
SEMICIRCLE AND 120 NM S SEMICIRCLE.

.48 HOUR FORECAST HURRICANE MADELINE 19.3N 144.5W. MAXIMUM
SUSTAINED WINDS 70 KT GUSTS 85 KT. WINDS 34 KT OR GREATER AND SEAS
12 FT OR GREATER WITHIN 100 NM N SEMICIRCLE...80 NM SE QUADRANT
AND 60 NM SW QUADRANT. WINDS 20 TO 33 KT AND SEAS 8 TO 12 FT
ELSEWHERE WITHIN 180 NM N SEMICIRCLE AND 120 NM S SEMICIRCLE.

.72 HOUR FORECAST HURRICANE MADELINE 20.4N 148.2W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT.

EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.

.96 HOUR FORECAST TROPICAL STORM MADELINE 20.5N 152.5W. MAXIMUM
SUSTAINED WINDS 60 KT GUSTS 75 KT.

.120 HOUR FORECAST TROPICAL STORM MADELINE 20.0N 157.0W. MAXIMUM
SUSTAINED WINDS 50 KT GUSTS 60 KT.

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

.SYNOPSIS AND FORECAST.

.LOW 13N160W 1012 MB NEARLY STATIONARY. ISOLATED MODERATE TSTMS
WITHIN 120 NM OF CENTER.

.24 HOUR FORECAST LOW 13N160W 1011 MB.

.48 HOUR FORECAST LOW 14N160W 1011 MB.

.TROUGH FROM 30N170W TO 24N177E TO 22N166E MOVING NW SLOWLY.
ISOLATED MODERATE TSTMS WITHIN 120 NM OF TROUGH BETWEEN 178E AND
174W.

.24 HOUR FORECAST TROUGH FROM 20N177W TO 24N170E.

.48 HOUR FORECAST TROUGH FROM 30N178W TO 26N175E.

.FRONT JUST W OF FORECAST AREA MOVING E 10 KT. WINDS 20 TO 25 KT N
OF 27N W OF 164E. ISOLATED MODERATE TSTMS N OF 26N W OF 166E.

.24 HOUR FORECAST FRONT FROM 30N163E TO 25N160E. WINDS 20 TO 25 KT
N OF 28N BETWEEN 165E AND 172E.

.48 HOUR FORECAST FRONT FROM 30N170E TO 23N160E. WINDS DIMINISHED
TO 20 KT OR LESS.

.RIDGE FROM 30N162W TO 18N175E TO 15S160E NEARLY STATIONARY.

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

.SEAS 8 TO 11 FT N OF 24N W OF 163E.

.24 HOUR FORECAST SEAS 8 TO 10 FT N OF 20N W OF 166E.

.48 HOUR FORECAST SEAS 8 TO 12 FT N OF 20N W OF 168E.

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

.MONSOON TROUGH FROM 15N140W TO 13N157W. ISOLATED MODERATE TSTMS
WITHIN 180 NM OF TROUGH

.SCATTERED MODERATE TSTMS FROM 15N TO 20N BETWEEN 163E AND 170E.
ISOLATED MODERATE TSTMS FROM 08N TO 18N BETWEEN 172E AND 178W.

$$

.FORECASTER BURKE. HONOLULU HI.


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