839
FZPN40 PHFO 282225
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC AUG 28 2016.
24 HOUR FORECAST VALID 1800 UTC AUG 29 2016.
48 HOUR FORECAST VALID 1800 UTC AUG 30 2016.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM MADELINE NEAR 16.9N 141.9W 997 MB AT 2100 UTC MOVING
NW 08 KT. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. WINDS 34 KT OR
GREATER WITHIN 60 NM N SEMICIRCLE...50 NM SW QUADRANT...AND 20 NM SE
QUADRANT. 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 15N TO 19N E OF 144W. NUMEROUS MODERATE TO STRONG
TSTMS FROM 15N TO 18N BETWEEN 140W AND 143W.
.24 HOUR FORECAST HURRICANE MADELINE 18.5N 144.6W. MAXIMUM SUSTAINED
WINDS 65 KT GUSTS 80 KT. WINDS 34 KT OR GREATER AND SEAS 12 FT OR
HIGHER WITHIN 90 NM NE...40 NM SE...60 NM SW...AND 90 NM NW
QUADRANTS. WINDS 20 TO 33 KT AND SEAS 8 TO 12 FT ELSEWHERE FROM 17N
TO 22N BETWEEN 141W AND 147W.
.48 HOUR FORECAST TROPICAL STORM MADELINE 19.3N 148.2W. MAXIMUM
SUSTAINED WINDS 60 KT GUSTS 75 KT. WINDS 34 KT OR GREATER AND SEAS
12 FT OR HIGHER WITHIN 90 NM NE...60 NM SE...70 NM SW AND 90 NM NW
QUADRANTS. WINDS 20 TO 33 KT AND SEAS 8 TO 12 FT ELSEWHERE FROM 18N
TO 23N BETWEEN 144W AND 152W.
.72 HOUR FORECAST TROPICAL STORM MADELINE 19.2N 152.4W. MAXIMUM
SUSTAINED WINDS 50 KT GUSTS 60 KT.

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

.96 HOUR FORECAST TROPICAL STORM MADELINE 18.5N 156.8W. MAXIMUM
SUSTAINED WINDS 45 KT GUSTS 55 KT.
.120 HOUR FORECAST TROPICAL STORM MADELINE 17.5N 161.1W. MAXIMUM
SUSTAINED WINDS 40 KT GUSTS 50 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 1010 MB NEARLY STATIONARY. TROUGHS FROM LOW TO 14N157W
TO 12N151W TO 11N147W...AND FROM LOW TO 10N163W TO 07N170W. TROUGHS
NEARLY STATIONARY. ISOLATED MODERATE TSTMS FROM 13N TO 16N BETWEEN
156W AND 161W...FROM 05N TO 12N BETWEEN 159W AND 170W...AND FROM 08N
TO 11N E OF 153W.
.24 HOUR FORECAST LOW 14N160W 1011 MB. TROUGHS...LITTLE CHANGE.
.48 HOUR FORECAST LOW 15N161W 1012 MB. TROUGHS FROM LOW TO 11N149W...
AND FROM LOW TO 09N171W.

.FRONT FROM 30N175W TO 27N178E TO 30N169E NEARLY STATIONARY.
ISOLATED MODERATE TSTMS WITHIN 120 NM OF FRONT.
.24 HOUR FORECAST FRONT FROM 30N174W TO 28N180E TO 30N175E.
.48 HOUR FORECAST FRONT MOVED N OF FORECAST AREA.

.FRONT FROM 30N163E TO 28N164E TO 21N160E MOVING E SLOWLY N OF 25N...
AND NEARLY STATIONARY ELSEWHERE. E TO SE WINDS 20 TO 25 KT OVER
FORECAST WATERS N OF 29N BETWEEN 169E AND 173E. ISOLATED MODERATE
TSTMS WITHIN 120 NM OF FRONT.
.24 HOUR FORECAST FRONT FROM 30N165E TO 28N168E TO 20N164E TO
17N160E. WINDS EASED TO 20 KT OR LESS OVER FORECAST WATERS.
.48 HOUR FORECAST DISSIPATING FRONT FROM 30N170E TO 20N166E TO
17N160E.

.TROUGH FROM 24N167E TO 19N167E TO 16N160E NEARLY STATIONARY.
ISOLATED MODERATE TO LOCALLY STRONG TSTMS FROM 14N TO 20N BETWEEN
160E AND 171E.
.24 HOUR FORECAST WEAKENING TROUGH FROM 27N171E TO 20N167E TO
16N164E.
.48 HOUR FORECAST TROUGH MERGED WITH FRONT DISCUSSED IMMEDIATELY
ABOVE.

.TROUGH FROM 13N174E TO 10N170E TO 06N169E NEARLY STATIONARY.
ISOLATED MODERATE TSTMS BOUNDED BY 20N179W TO 07N175W TO 03N166E TO
05N161E TO 18N174E TO 20N179W.
.24 HOUR FORECAST TROUGH FROM 14N171E TO 10N169E TO 07N168E.
.48 HOUR FORECAST WEAK TROUGH FROM 13N168E TO 08N166E.

.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 23N W OF 165E.
.24 HOUR FORECAST SEAS 8 TO 10 FT N OF 24N W OF 165E.
.48 HOUR FORECAST SEAS 8 TO 11 FT N OF 21N W OF 170E.

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

$$

.FORECASTER KINEL. HONOLULU HI.