High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 271127
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC AUG 27 2016.
24 HOUR FORECAST VALID 0600 UTC AUG 28 2016.
48 HOUR FORECAST VALID 0600 UTC AUG 29 2016.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM MADELINE JUST E OF FORECAST AREA NEAR 14.5N 138.4W
1000 MB AT 0900 UTC AUG 27 MOVING WNW OR 300 DEG AT 9 KT. MAXIMUM
SUSTAINED WINDS 45 KT GUSTS 55 KT. WINDS INCREASING TO 20 TO 33 KT AND
SEAS BUILDING TO 8 TO 12 FT OVER FORECAST WATERS FROM 19N TO 11N E OF
142W.
.24 HOUR FORECAST TROPICAL STORM MADELINE NEAR 15.8N 140.5W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE
WINDS WITHIN 80 NM N SEMICIRCLE...60 NM SE QUADRANT AND 40 NM SW
QUADRANT. SEAS 12 FT OR GREATER OVER FORECAST WATERS WITHIN 120
NM E SEMICIRCLE WITH SEAS TO 15 FT. WINDS 20 TO 33 KT AND SEAS 8 TO 12 FT
ELSEWHERE OVER FORECAST WATERS FROM 19N TO 11N E OF 144W.
.48 HOUR FORECAST HURRICANE MADELINE NEAR 17.8N 143.4W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS
WITHIN 120 NM NE QUADRANT...80 NM SE QUADRANT...60 NM SW
QUADRANT...AND 100 NM NW QUADRANT. TROPICAL STORM FORCE WINDS
WITHIN 80 NM N SEMICIRCLE...60 NM SE QUADRANT...40 NM SW QUADRANT.
SEAS 12 FT OR GREATER OVER FORECAST WATERS WITHIN 180 NM NE SEMICIRCLE
WITH SEAS TO 18 FT. SEAS 20 TO 33 FT AND SEAS 8 TO 12 FT ELSEWHERE OVER
FORECAST WATERS FROM 25N TO 14N E OF 148W.
.72 HOUR FORECAST HURRICANE MADELINE NEAR 19.5N 146.5W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS
WITHIN 120 NM NE QUADRANT...80 NM SE QUADRANT...60 NM SW QUADRANT...
100 NM NW QUADRANT. SEAS 12 FT OR GREATER OVER FORECAST WATERS WITHIN
180 NM NE SEMICIRCLE WITH SEAS TO 18 FT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE MADELINE NEAR 20.5N 150.5W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT.
.120 HOUR FORECAST TROPICAL STORM MADELINE NEAR 20.5N 155.0W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 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 ALONG MONSOON TROUGH NEAR 12N157W 1011 MB MOVING W SLOWLY. ISOLATED
MODERATE TO STRONG TSTMS WITHIN 360 NM OF LOW CENTER NW SEMICIRCLE.
ADDITIONAL TSTMS INCLUDED WITH MONSOON TROUGH DESCRIBED BELOW.
.24 HOUR FORECAST LOW NEAR 11N160W 1011 MB.
.48 HOUR FORECAST DISSIPATING LOW NEAR 13N161W 1010 MB.

.LOW NEAR 20N165E 1011 MB MOVING N 10 KT. TROUGH FROM LOW TO 21N173E TO
23N179E TO 25N175W. ISOLATED MODERATE TO STRONG TSTMS WITHIN 480 NM S OF
TROUGH AXIS.
.24 HOUR FORECAST LOW NEAR 26N166E. TROUGHS FROM LOW TO 25N176E TO 28N177W
AND FROM LOW TO 29N160E. WINDS INCREASING TO S TO SE 20 TO 25 KT OVER
FORECAST WATERS N OF 20N W OF 167E.
.48 HOUR FORECAST LOW DISSIPATED. DEVELOPING FRONT FROM 30N163E TO 28N170E
TO 27N175E TO 30N179W. WINDS SW TO E 20 TO 25 KT OVER FORECAST WATERS N OF
20N W OF 170E.

.DEVELOPING WARM FRONT 25N175W TO 30N167W MOVING NW 10 KT.
.24 HOUR FORECAST FRONT FROM 28N177W TO 30N173W.
.48 HOUR FORECAST FRONT N OF FORECAST AREA.

.TROUGH DEVELOPING OVER FORECAST AREA.
.48 HOUR FORECAST TROUGH FROM 24N144W TO 28N140W.

.RIDGE BUILDING OVER FORECAST AREA.
.48 HOUR FORECAST RIDGE FROM 30N164W TO 24N174W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.OTHERWISE SEAS BUILDING TO GREATER THAN 8 FT.
.24 HOUR FORECAST SEAS 8 TO 10 FT FROM 30N TO 22N BETWEEN 160E AND 163E.
.48 HOUR FORECAST SEAS 8 TO 10 FT FROM 30N TO 22N BETWEEN 160E AND 168E.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.MONSOON TROUGH FROM 12N140W TO 12N144W TO 13N152W TO 12N157W. ISOLATED
MODERATE TSTMS WITHIN 180 NM EITHER SIDE OF TROUGH AXIS.

.ITCZ FROM 09N169W TO 10N176W TO 08N177E TO 10N168E. SCATTERED MODERATE
TO STRONG TSTMS WITHIN 300 NM N OF ITCZ...AND WITHIN 150 NM S OF ITCZ.

$$

.FORECASTER BEDAL. HONOLULU HI.



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