High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 011645
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC SAT AUG 01 2015

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

SECURITE

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 1200 UTC AUG 01 2015.
24 HOUR FORECAST VALID 1200 UTC AUG 02 2015.
48 HOUR FORECAST VALID 1200 UTC AUG 03 2015.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE GUILLERMO JUST E OF AREA NEAR 13.5N 139.0W 970 MB AT 1500
UTC AUG 01 MOVING W OR 280 DEG AT 12 KT. MAXIMUM SUSTAINED WINDS 90
KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM NE
QUADRANT...100 NM SE QUADRANT...60 NM SW QUADRANT...AND 90 NM NW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NM NW AND SE
QUADRANTS...360 NM NE QUADRANT AND 180 NM SW QUADRANT WITH SEAS
TO 35 FT. ELSEWHERE E OF 142W WITHIN 270 NM OF CENTER EXCEPT 330 NM
NE QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. ISOLATED MODERATE TO
STRONG TSTMS FROM 15N TO 10N E OF 142W.
.12 HOUR FORECAST HURRICANE GUILLERMO NEAR 13.9N 141.0W. MAXIMUM
SUSTAINED WINDS 90 KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS
WITHIN 120 NM NE QUADRANT...100 NM SE QUADRANT...60 NM SW
QUADRANT...AND 90 NM NW QUADRANT.  SEAS 12 FT OR GREATER WITHIN
270 NM NW AND 240 NM SE QUADRANTS...360 NM NE QUADRANT AND 210 NM SW
QUADRANT WITH TO SEAS TO 34 FT. ELSEWHERE WITHIN 270 NM OF
CENTER...EXCEPT 390 NM NE QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 11 FT
IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE GUILLERMO NEAR 14.5N 143.0W. MAXIMUM
SUSTAINED WINDS 85 KT GUSTS 105 KT. WINDS 34 KT OR GREATER WITHIN
120 NM NE QUADRANT...100 NM SE QUADRANT...60 NM SW QUADRANT...90 NM
NORTHWEST QUADRANT. WINDS 20 TO 33 KT ELSEWHERE WITHIN 360 NM NE
SEMICIRCLE...120 NM SW SEMICIRCLE. SEAS 12 FT OR HIGHER WITHIN 360
NM NE QUADRANT...240 NM SE QUADRANT...180 NM SW QUADRANT...240 NM NW
QUADRANT. SEAS 8 TO 12 FT ELSEWHERE WITHIN 600 NM N SEMICIRCLE AND
360 NM S SEMICIRCLE.
.48 HOUR FORECAST HURRICANE GUILLERMO NEAR 16.2N 146.0W. MAXIMUM
SUSTAINED WINDS 70 KT GUSTS 85 KT. WINDS 34 KT OR GREATER WITHIN 100
NM NE QUADRANT...100 NM SE QUADRANT...60 NM SW QUADRANT...90 NM NW
QUADRANT. SEAS 12 FT OR HIGHER WITHIN 360 NM NE QUADRANT...240 NM SE
QUADRANT...180 NM SW QUADRANT...240 NM NW QUADRANT. SEAS 8 TO 12 FT
ELSEWHERE WITHIN 600 NM N SEMICIRCLE AND 360 NM S SEMICIRCLE.
.72 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 17.5N 148.5W MAXIMUM
SUSTAINED WINDS 60 KT GUSTS 75 KT. WINDS 34 KT OR GREATER WITHIN 100
NM NE QUADRANT...100 NM SE QUADRANT...60 NM SW QUADRANT...90 NM NW
QUADRANT. SEAS 12 FT OR HIGHER WITHIN 360 NM NE QUADRANT...240 NM SE
QUADRANT...180 NM SW QUADRANT...240 NM NW QUADRANT. SEAS 8 TO 12 FT
ELSEWHERE WITHIN 600 NM N SEMICIRCLE AND 360 NM S SEMICIRCLE.

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

.96 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 19.0N 151.5W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
.120 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 20.7N 155.0W
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT.

FORECAST WINDS NEAR TROPICAL CYCLONES SHOULD BE USED WITH CAUTION
DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE AND INTENSITY.

.SYNOPSIS AND FORECAST.

.LOW NEAR 11N166W 1008 MB MOVING W 15 KT. ASSOCIATED WINDS AND SEAS
INCLUDED BELOW. ISOLATED MODERATE TSTMS WITHIN 360 NM OF LOW.
.24 HOUR FORECAST LOW NEAR 11N172W 1008 MB.
.48 HOUR FORECAST LOW NEAR 13N176W 1008 MB.

.LOW 16N151W 1008 MB. TROUGH 19N151W THROUGH LOW TO 13N149W.
ISOLATED STRONG TSTMS WITHIN 90 NM OF LOW.
.24 HOUR FORECAST LOW 13N155W 1007 MB. TROUGH FROM LOW TO 12N155W.
.48 HOUR FORECAST LOW 12N160W 1007 MB. TROUGH FROM LOW TO 12N161W.

.TROUGH 30N175W 24N179W 16N179W. ISOLATED STRONG TSTMS N OF 24N
BETWEEN 180 NM AND 600 NM E OF TROUGH. ISOLATED MODERATE TSTMS S OF
24N BETWEEN 120 NM AND 600 NM E AND SE OF TROUGH.
.24 HOUR FORECAST TROUGH 25N178E 16N177E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 09N168E 12N160E. SCATTERED MODERATE TSTMS FROM 14N TO 04N W
OF 168E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.ITCZ 04N140W 05N152W 10N160W. SCATTERED MODERATE TSTMS WITHIN 150
NM OF ITCZ E OF 152W. ISOLATED MODERATE TSTMS ELSEWHERE WITHIN 300
NM OF ITCZ.

.WINDS 20 TO 25 KT WITHIN 180 NM EITHER SIDE OF LINE 23N146W
13N165W.
.24 HOUR FORECAST WINDS DIMINISHED TO 20 KT OR LESS.

.SEAS 8 TO 10 FT WITHIN 150 NM EITHER SIDE OF LINE 23N146W
13N165W.
.24 HOUR FORECAST SEAS DIMINISHED TO LESS THAN 8 FT.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.ISOLATED MODERATE TO STRONG TSTMS SW OF LINE 16N166E 00N177W.
ISOLATED MODERATE TSTMS FROM 26N TO 18N W OF 167E.

$$
.HONOLULU HI.





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