High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 032230
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC MON AUG 03 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC AUG 03 2015.
24 HOUR FORECAST VALID 1800 UTC AUG 04 2015.
48 HOUR FORECAST VALID 1800 UTC AUG 05 2015.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM GUILLERMO NEAR 17.5N 146.8W AT 2100 UTC MOVING NW
10 KT. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM
FORCE WINDS WITHIN 120 NM NE...85 NM SE...60 NM SW...75 NM NW
QUADRANTS. SEAS 12 FT OR GREATER WITHIN 280 NM NE...180 NM SE...220
NM SW...280 NM NW QUADRANTS. WINDS 20 TO 33 KT ELSEWHERE WITHIN 280
NM NE QUADRANT. SEAS 8 TO 12 FT ELSEWHERE FROM 15N TO 23N BETWEEN
143W AND 152W. SCATTERED MODERATE TO STRONG TSTMS WITHIN 120 NM OF
CENTER.
.24 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 19.1N 149.6W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE
WINDS WITHIN 85 NM NE...65 NM SE...35 NM SW...60 NM NW QUADRANTS.
SEAS 12 FT OR GREATER WITHIN 240 NM NE...150 NM SE...180 NM SW...
240 NM NW QUADRANTS. WINDS 20 TO 33 KT ELSEWHERE WITHIN 220 NM NE
QUADRANT. SEAS 8 TO 12 FT ELSEWHERE FROM 19N TO 26N BETWEEN 150W AND
158W.
.48 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 20.9N 153.2W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE
SEAS 12 FT OR GREATER WITHIN 220 NM NE...120 NM SE...150 NM SW...
180 NM NW QUADRANTS. WINDS 20 TO 33 KT ELSEWHERE 200 NM NE QUADRANT.
SEAS 8 TO 12 FT ELSEWHERE FROM 22N TO 28N BETWEEN 152W AND 161W.
.72 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 22.9N 157.1W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 75 NM NE...50 NM SE...25 NM SW...50 NM NW QUADRANTS.
SEAS 12 FT OR GREATER WITHIN 180 NM NE...120 NM SE...90 NM SW...150
NM NW QUADRANTS.
.EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 25.0N 161.0W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.120 HOUR FORECAST TROPICAL DEPRESSION GUILLERMO NEAR 26.0N 165.5W.
MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.

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

.SYNOPSIS AND FORECAST.

.LOW 13N165W 1008 MB MOVING W 15 KT. ISOLATED MODERATE TO STRONG
TSTMS WITHIN 240 NM NW AND NE QUADRANTS OF LOW.
.24 HOUR FORECAST LOW DISSIPATED.

.LOW 12N177W 1008 MB MOVING W SLOWLY.  ISOLATED MODERATE TO STRONG
TSTMS 200 NM QUADRANT.
.24 HOUR FORECAST LOW DISSIPATED.

.LOW 24N153W 1011 MB MOVING W 15 KT. WINDS 20 TO 25 KT WITHIN 75 NM
N QUADRANT.
.24 HOUR FORECAST LOW 25N158W 1012 MB. WINDS DIMINISHED TO 20 KT OR
LESS.
.48 HOUR FORECAST LOW DISSIPATED.

.WEAK LOW 29N165E 1010 MB NEARLY STATIONARY. FRONT FROM LOW TO
30N170E STATIONARY.
.24 HOUR FORECAST LOW DISSIPATED. FRONT LITTLE CHANGE.
.48 HOUR FORECAST FRONT MOVED N OF FORECAST AREA.

.TROUGH 12N148W TO 06N157W TO 02N166W NEARLY STATIONARY. ISOLATED
MODERATE TO STRONG TSTMS WITHIN 360 NM OF TROUGH W OF 155W.
.24 HOUR FORECAST TROUGH LITTLE CHANGE.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 07N160E TO 05N165E TO 03N175E TO 00N178W NEARLY STATIONARY.
SCATTERED MODERATE TO STRONG TSTMS WITHIN 240 NM OF TROUGH W OF 178E.
.24 HOUR FORECAST TROUGH 07N160E TO 00N180E.
.48 HOUR FORECAST TROUGH LITTLE CHANGE.

.RIDGE 30N164W TO 28N175W TO 26N167E NEARLY STATIONARY.

.WINDS 20 KT OR LESS AND SEAS 8 FT OR LESS OVER REMAINDER OF
FORECAST AREA.

.ISOLATED MODERATE TSTMS FROM 10N TO 14N E OF 143W...AND FROM 02N TO
10N E OF 148W...AND WITHIN 120 NM OF A LINE FROM 16N160E TO 16N172E
TO 26N177W.

$$
.HONOLULU HI




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