The High Seas Forecast for the Central North Pacific

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FZPN40 PHFO 290325
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC MON AUG 29 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 29 2016.
24 HOUR FORECAST VALID 0000 UTC AUG 30 2016.
48 HOUR FORECAST VALID 0000 UTC AUG 31 2016.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM MADELINE NEAR 17.4N 143.1W 997 MB AT 0300 UTC MOVING
WNW 09 KT. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. WINDS 34 KT OR
GREATER WITHIN 60 NM N SEMICIRCLE...AND 30 NM S SEMICIRCLE. SEAS 12
FT OR HIGHER WITHIN 60 NM NE...30 NM SE...60 NM SW...AND 90 NM NW
QUADRANTS. WINDS 20 TO 33 KT AND SEAS 8 TO 12 FT ELSEWHERE FROM 16N
TO 20N E OF 145W. NUMEROUS MODERATE TO STRONG TSTMS FROM 16N TO 18N
BETWEEN 141W AND 144W.
.24 HOUR FORECAST HURRICANE MADELINE 18.8N 146.2W. MAXIMUM SUSTAINED
WINDS 65 KT GUSTS 80 KT. WINDS 34 KT OR GREATER AND SEAS 12 FT OR
HIGHER WITHIN 90 NM NE...50 NM SE...40 NM SW...AND 90 NM NW
QUADRANTS. WINDS 20 TO 33 KT AND SEAS 8 TO 12 FT ELSEWHERE FROM 18N
TO 23N BETWEEN 142W AND 148W.
.48 HOUR FORECAST TROPICAL STORM MADELINE 19.2N 149.8W. MAXIMUM
SUSTAINED WINDS 60 KT GUSTS 75 KT. WINDS 34 KT OR GREATER AND SEAS
12 FT OR HIGHER WITHIN 80 NM NE...50 NM SE...40 NM SW AND 80 NM NW
QUADRANTS. WINDS 20 TO 33 KT AND SEAS 8 TO 12 FT ELSEWHERE FROM 18N
TO 24N BETWEEN 146W AND 153W.
.72 HOUR FORECAST TROPICAL STORM MADELINE 18.7N 154.0W. MAXIMUM
SUSTAINED WINDS 55 KT GUSTS 65 KT.

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

.96 HOUR FORECAST TROPICAL STORM MADELINE 17.9N 158.2W. MAXIMUM
SUSTAINED WINDS 50 KT GUSTS 60 KT.
.120 HOUR FORECAST TROPICAL STORM MADELINE 17.0N 162.5W. MAXIMUM
SUSTAINED WINDS 45 KT GUSTS 55 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 1009 MB NEARLY STATIONARY. TROUGHS FROM LOW TO 14N157W
TO 12N151W TO 11N147W...AND FROM LOW TO 10N162W TO 06N170W. TROUGHS
NEARLY STATIONARY. ISOLATED MODERATE TSTMS FROM 13N TO 16N BETWEEN
151W AND 162W...WITHIN 60 NM OF LINE FROM 12N156W TO 09N161W TO
06N168W...AND FROM 08N TO 11N E OF 153W.
.24 HOUR FORECAST LOW 14N160W 1011 MB. TROUGHS...LITTLE CHANGE.
.48 HOUR FORECAST LOW 15N163W 1012 MB. TROUGHS FROM LOW TO
11N149W...AND FROM LOW TO 10N170W.

.FRONT FROM 30N175W TO 27N178E TO 30N169E NEARLY STATIONARY.
ISOLATED MODERATE TSTMS WITHIN 120 NM OF FRONT...AND ELSEWHERE N OF
LINE FROM 24N179W TO 21N175E TO 23N171E.
.24 HOUR FORECAST FRONT FROM 30N174W TO 28N177W TO 30N177E.
.48 HOUR FORECAST FRONT MOVED N OF FORECAST AREA.

.FRONT FROM 30N164E TO 24N163E TO 19N160E MOVING E SLOWLY N OF 24N...
AND NEARLY STATIONARY ELSEWHERE. E TO SE WINDS 20 TO 25 KT OVER
FORECAST WATERS N OF 29N BETWEEN 169E AND 174E. ISOLATED MODERATE
TSTMS WITHIN 90 NM OF FRONT.
.24 HOUR FORECAST FRONT FROM 30N166E TO 27N169E TO 20N165E TO
16N160E. WINDS EASED TO 20 KT OR LESS OVER FORECAST WATERS.
.48 HOUR FORECAST DISSIPATING FRONT FROM 30N171E TO 20N166E TO
16N160E.

.TROUGH FROM 24N168E TO 19N167E TO 16N160E NEARLY STATIONARY.
ISOLATED MODERATE TSTMS BOUNDED BY 20N165E TO 17N171E TO 12N165E TO
15N160E TO 17N160E TO 20N165E.
.24 HOUR FORECAST WEAKENING TROUGH FROM 28N172E TO 26N172E TO
18N167E.
.48 HOUR FORECAST TROUGH MERGED WITH FRONT DISCUSSED IMMEDIATELY
ABOVE.

.TROUGH FROM 13N173E TO 10N170E TO 05N169E NEARLY STATIONARY.
ISOLATED MODERATE TSTMS WITHIN 90 NM OF TROUGH...ELSEWHERE FROM 09N
TO 19N BETWEEN 173E AND 180E...AND FROM 04N TO 10N BETWEEN 162E AND
166E.
.24 HOUR FORECAST TROUGH FROM 15N170E TO 06N168E.
.48 HOUR FORECAST WEAK TROUGH FROM 14N167E TO 09N166E.

.TROUGH FROM 24N140W TO 21N142W MOVING NW 15 KT. ISOLATED MODERATE
TSTMS FROM 23N TO 25N E OF 143W.
.24 HOUR FORECAST TROUGH FROM 28N140W TO 25N145W TO 23N149W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.RIDGE FROM 30N164W TO 22N180E TO 15N170E TO 10N160E NEARLY
STATIONARY.

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

.THE FOLLOWING ARE SEAS NOT ASSOCIATED WITH T.S. MADELINE.

.SEAS 8 TO 9 FT N OF 27N W OF 166E.
.24 HOUR FORECAST SEAS 8 TO 11 FT N OF 22N W OF 166E.
.48 HOUR FORECAST SEAS 8 TO 10 FT N OF 22N W OF 172E.

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

$$

.FORECASTER KINEL. HONOLULU HI.


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