High Seas Forecast
Issued by NWS

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FZPN40 PHFO 301531
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC TUE AUG 30 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC AUG 30 2016.
24 HOUR FORECAST VALID 1200 UTC AUG 31 2016.
48 HOUR FORECAST VALID 1200 UTC SEP 01 2016.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE MADELINE NEAR 19.3N 148.3W 958 MB AT 0900 UTC MOVING
W 09 KT. MAXIMUM SUSTAINED WINDS 105 KT GUSTS 130 KT. WINDS 34 KT
OR GREATER AND SEAS 12 FT OR HIGHER WITHIN 110 NM N
SEMICIRCLE...AND 80 NM S SEMICIRCLE. WINDS 20 TO 33 KT AND SEAS 8
TO 12 FT ELSEWHERE WITHIN 330 NM N SEMICIRCLE AND 240 NM S
SEMICIRCLE. NUMEROUS MODERATE TO STRONG TSTMS WITHIN 120 NM OF
CENTER.
.24 HOUR FORECAST HURRICANE MADELINE 19.1N 151.7W. MAXIMUM
SUSTAINED WINDS 90 KT GUSTS 110 KT. WINDS 34 KT OR GREATER AND
SEAS 12 FT OR HIGHER WITHIN 100 NM NE...80 NM SE...80 NM SW...AND
100 NM NW QUADRANTS. WINDS 20 TO 33 KT AND SEAS 8 TO 12 FT
ELSEWHERE WITHIN 360 NM N SEMICIRCLE AND 270 NM S SEMICIRCLE.
.48 HOUR FORECAST HURRICANE MADELINE 18.5N 155.7W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT. WINDS 34 KT OR GREATER AND SEAS
12 FT OR HIGHER WITHIN 90 NM NE...50 NM SE...50 NM SW...AND 90 NM
NW QUADRANTS. WINDS 20 TO 33 KT AND SEAS 8 TO 12 FT WITHIN 270 NM
N SEMICIRCLE AND 180 NM S SEMICIRCLE.
.72 HOUR FORECAST HURRICANE MADELINE 18.6N 159.9W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT.

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

.96 HOUR FORECAST TROPICAL STORM MADELINE 19.4N 164.4W. MAXIMUM
SUSTAINED WINDS 55 KT GUSTS 65 KT.
.120 HOUR FORECAST TROPICAL STORM MADELINE 20.2N 169.5W. 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.

...HURRICANE WARNING...
.36 HOUR FORECAST HURRICANE LESTER NEAR 18.2N 140.6W. MAXIMUM
SUSTAINED WINDS 85 KT GUSTS 105 KT. WINDS 34 KT OR GREATER AND
SEAS 12 FT OR HIGHER WITHIN 110 NM NE...90 NM SE...80 NM SW...AND
100 NM NW QUADRANTS. WINDS 20 TO 33 KT AND SEAS 8 TO 12 FT WITHIN
270 NM N SEMICIRCLE AND 180 NM S SEMICIRCLE.
.48 HOUR FORECAST HURRICANE LESTER NEAR 18.5N 142.8W. MAXIMUM
SUSTAINED WINDS 80 KT GUSTS 100 KT. WINDS 34 KT OR GREATER AND
SEAS 12 FT OR HIGHER WITHIN 110 NM NE...90 NM SE...80 NM SW...AND
100 NM NW QUADRANTS. WINDS 20 TO 33 KT AND SEAS 8 TO 12 FT WITHIN
270 NM N SEMICIRCLE AND 180 NM S SEMICIRCLE.

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 16N162W 1012 MB MOVING WNW SLOWLY. TROUGHS FROM LOW TO
13N155W TO 13N140W...AND FROM LOW TO 08N173W. TROUGHS NEARLY
STATIONARY. ISOLATED MODERATE TSTMS WITHIN 120 NM N
SEMICIRCLE OF LOW...AND 210 NM S OF E TROUGH.
.24 HOUR FORECAST LOW 16N166W 1012 MB. TROUGHS FROM LOW TO
13N140W...AND FROM LOW TO 10N173W.
.48 HOUR FORECAST LOW 16N170W 1012 MB. TROUGHS FROM LOW TO
10N171W. TROUGH SEPARATED FROM LOW FROM 12N140W TO 12N160W.

.FRONT FROM 30N168E TO 28N170E TO 15N160E MOVING E 10 KT N OF
25N...AND NEARLY STATIONARY ELSEWHERE. ISOLATED MODERATE TSTMS
WITHIN 240 NM OF FRONT.
.24 HOUR FORECAST FRONT FROM 30N180E TO 27N170E. S TO SW WINDS 20
TO 30 KT N OF 27N BETWEEN 172W AND 180E.
.48 HOUR FORECAST FRONT FROM 30N172W TO 27N176W. WINDS DIMINISHED
TO 20 KT OR LESS.

.FRONT FROM 30N173W TO 27N180W TO 30N170E NEARLY STATIONARY.
SCATTERED MODERATE TSTMS WITHIN 180 NM OF FRONT.
.24 HOUR FORECAST FRONT MOVED N OF FORECAST AREA.

.TROUGH FROM 15N170E TO 06N169E NEARLY STATIONARY. SCATTERED MODERATE
TSTMS WITHIN 22O NM E OF TROUGH AND 90 NM W OF TROUGH.
.24 HOUR FORECAST WEAK TROUGH FROM 15N168E TO 08N167E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.RIDGE FROM 30N165W TO 16N170E NEARLY STATIONARY.

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

.24 HOUR FORECAST SEAS 8 TO 12 FT ELSEWHERE FROM 12N TO 28N W OF
158W.
.48 HOUR FORECAST SEAS 8 TO 12 FT ELSEWHERE FROM 12N TO 28N W OF
160W.

.THE FOLLOWING ARE SEAS NOT ASSOCIATED WITH HURRICANE MADELINE OR
LESTER.

.SEAS 8 TO 10 FT N OF 20N W OF 170E.
.24 HOUR FORECAST SEAS 8 TO 10 FT N OF LINE FROM 30N175W TO
20N170E TO 24N160E.
.48 HOUR FORECAST SEAS 8 TO 9 FT N OF 28N BETWEEN 169W AND 175W.

.SEAS 8 FT OR LESS OVER REST OF FORECAST AREA.

.ISOLATED MODERATE TSTMS FROM 07N TO 10N BETWEEN 180E AND
175E...AND FROM 01N TO 06N W OF 166E.

$$

.FORECASTER MORRISON. HONOLULU HI.



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