High Seas Forecast
Issued by NWS

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FZPN40 PHFO 280324
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC SUN AUG 28 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 28 2016.
24 HOUR FORECAST VALID 0000 UTC AUG 29 2016.
48 HOUR FORECAST VALID 0000 UTC AUG 30 2016.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM MADELINE JUST E OF FORECAST AREA NEAR 15.6N 139.8W
998 MB MOVING WNW 07 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 17.4N 142.4W. 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 19.2N 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 TROPICAL STORM MADELINE 20.0N 149.5W. MAXIMUM
SUSTAINED WINDS 60 KT GUSTS 75 KT.

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

.96 HOUR FORECAST TROPICAL STORM MADELINE 19.5N 153.8W. MAXIMUM
SUSTAINED WINDS 55 KT GUSTS 65 KT.
.120 HOUR FORECAST TROPICAL STORM MADELINE 19.0N 158.5W. 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 12N160W 1010 MB NEARLY STATIONARY. ISOLATED MODERATE TSTMS
WITHIN 120 NM OF CENTER.
.24 HOUR FORECAST LOW 13N160W 1009 MB.
.48 HOUR FORECAST LOW 14N160W 1010 MB.

.TROUGH FROM 30N170W TO 25N180E TO 22N169E MOVING NW SLOWLY.
ISOLATED MODERATE TSTMS WITHIN 120 NM OF A LINE 27N175W TO
20N172E TO 17N162E.
.24 HOUR FORECAST TROUGH FROM 20N177W TO 24N170E.
.48 HOUR FORECAST TROUGH FROM 30N178W TO 26N175E.

.FRONT NEAR 30N160E MOVING E 10 KT. WINDS 20 TO 25 KT W OF LINE
FROM 30N165E TO 24N160E. ISOLATED MODERATE TSTMS N OF 26N W OF
168E.
.24 HOUR FORECAST FRONT FROM 30N163E TO 25N160E. WINDS 20 TO 25
KT N OF 28N BETWEEN 165E AND 173E.
.48 HOUR FORECAST FRONT FROM 30N170E TO 23N160E. WINDS DIMINISHED
TO 20 KT OR LESS.

.HIGH 15N160E MOVING W SLOWLY. RIDGE FROM HIGH TO 20N180E TO 30N162W
NEARLY STATIONARY.
.24 HOUR FORECAST HIGH MOVED W OF FORECAST AREA.

.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 14N140W TO 12N158W. ISOLATED MODERATE TSTMS
WITHIN 180 NM OF TROUGH

.SCATTERED MODERATE TSTMS FROM 10N TO 15N BETWEEN 170E AND 177E.
ISOLATED MODERATE TSTMS FROM 03N TO 09N W OF 172E.

$$

.FORECASTER BURKE. HONOLULU HI.



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