High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 020430
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC SUN AUG 02 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 02 2015.
24 HOUR FORECAST VALID 0000 UTC AUG 03 2015.
48 HOUR FORECAST VALID 0000 UTC AUG 04 2015.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE GUILLERMO NEAR 14.0N 141.0W 970 MB AT 0300 UTC AUG 02
MOVING WNW OR 290 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 90 KT GUSTS
110 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM NE...100 NM SE...50
NM SW...90 NM NW. SEAS 12 FT WITHIN 420 NM NE...240 NM SE...210 NM
SW...300 NM NW. SEAS 12 FT OR GREATER WITHIN 420 NM NE QUADRANT...
240 NM SE QUADRANT...210 NM SW QUADRANT...AND 300 NM NW QUADRANT
WITH SEAS TO 38 FT. WITHIN 270 NM OF CENTER EXCEPT 330 NM NE
QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. NUMEROUS STRONG TSTMS
WITHIN 120 NM OF CENTER NW QUADRANT. ISOLATED MODERATE TSTMS
ELSEWHERE WITHIN 180 NM OF CENTER.
.24 HOUR FORECAST HURRICANE GUILLERMO NEAR 15.3N 144.4W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS WITHIN
120 NM NE...100 NM SE...50 NM SW...90 NM NW. SEAS 12 FT OR GREATER
WITHIN 400 NM NE QUADRANT...210 NM SE QUADRANT...180 NM SW
QUADRANT... AND 270 NM NW QUADRANT WITH SEAS TO 35 FT. WITHIN 240 NM
OF CENTER EXCEPT 300 NM NE QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 12
FT.
.48 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 16.8N 147.2W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE
WINDS WITHIN 95 NM NE...75 NM SE...60 NM SW...80 NM NW. SEAS 12 FT
OR GREATER WITHIN 350 NM NE QUADRANT...180 NM SE QUADRANT...150 NM
SW QUADRANT... AND 240 NM NW QUADRANT WITH SEAS TO 30 FT. WITHIN 200
NM OF CENTER EXCEPT 250 NM NE QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO
12 FT.
.72 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 18.5N 150.4W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT.

EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 20.3N 153.8W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
.120 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 22.2N 157.7W.
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 15N154W 1009 MB. TROUGH 17N153W THROUGH LOW TO 11N149W. LOW
AND TROUGH MOVING W 15 KT. NE WINDS 20 TO 25 KT WITHIN 90 NM OF
LINE 20N152W 18N156W. SEAS 8 TO 9 FT FROM 22N TO 17N BETWEEN 152W
AND 155W.
.24 HOUR FORECAST LOW 13N159W 1007 MB. TROUGH 15N160W THROUGH LOW TO
11N158W. WINDS DIMINISHED TO 20 KT OR LESS. SEAS DIMINISHED TO LESS
THAN 8 FT.
.48 HOUR FORECAST LOW 12N164W 1008 MB. TROUGH 13N164W THROUGH LOW TO
10N163W.

.LOW 13N169W 1008 MB. TROUGH 14N169W THROUGH LOW TO 06N169W. LOW
AND TROUGH MOVING W 15 KT. WINDS 20 TO 25 KT WITHIN 120 NM OF LOW N
QUADRANT. SEAS 8 TO 9 FT FROM 17N TO 13N BETWEEN 164W AND 169W.
ISOLATED MODERATE TSTMS WITHIN 210 NM OF LOW N SEMICIRCLE.
.24 HOUR FORECAST LOW 11N174W 1008 MB. TROUGH 13N174W THROUGH LOW TO
07N174W. WINDS DIMINISHED TO 20 KT OR LESS. SEAS DIMINISHED TO LESS
THAN 8 FT.
.48 HOUR FORECAST LOW 12N179W 1008 MB. TROUGH 14N179W THROUGH LOW TO
10N178W.

.TROUGH 00N179E 10N160E MOVING W SLOWLY. ISOLATED MODERATE TSTMS
SW OF LINE 16N160E 14N167E 08N173E 00N177E.
.24 HOUR FORECAST TROUGH 00N178E 10N160E.
.48 HOUR FORECAST TROUGH 00N177E 07N160E.

.ITCZ 06N140W 05N150W 06N156W MOVING SW 15 KT. SCATTERED MODERATE
TSTMS WITHIN 120 NM OF ITCZ.

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

.ISOLATED TSTMS WITHIN 90 NM OF LINE 16N176W 16N180W.

$$
.HONOLULU HI.




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