High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 040430
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC TUE AUG 04 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 04 2015.
24 HOUR FORECAST VALID 0000 UTC AUG 05 2015.
48 HOUR FORECAST VALID 0000 UTC AUG 06 2015.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM GUILLERMO NEAR 17.8N 147.0W MOVING NW 09 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 180 NM NE...120 NM SE...60 NM SW...150 NM NW
QUADRANTS. WINDS 20 TO 33 KT ELSEWHERE WITHIN 240 NM NE QUADRANT.
SEAS 8 TO 12 FT ELSEWHERE FROM 16N TO 23N BETWEEN 143W AND 151W.
SCATTERED MODERATE TO STRONG TSTMS WITHIN 150 NM OF CENTER.
.24 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 19.8N 150.4W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE
WINDS WITHIN 80 NM NE...60 NM SE...20 NM SW...60 NM NW QUADRANTS.
SEAS 12 FT OR GREATER WITHIN 120 NM NE...100 NM SE...50 NM SW...
90 NM NW QUADRANTS. WINDS 20 TO 33 KT ELSEWHERE WITHIN 180 NM NE
QUADRANT. SEAS 8 TO 12 FT ELSEWHERE FROM 18N TO 26N BETWEEN 147W AND
154W.
.48 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 21.5N 154.0W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE
WITHIN 60 NM NE...40 NM SE AND NW QUADRANTS. SEAS 12 FT OR GREATER
WITHIN 90 NM NE...75 NM SE...40 NM SW...75 NM NW QUADRANTS. WINDS
20 TO 33 KT ELSEWHERE WITHIN 150 NM NE QUADRANT. SEAS 8 TO 12 FT
ELSEWHERE FROM 20N TO 28N BETWEEN 150W AND 160W.
.72 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 23.5N 157.9W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 40 NM NE...20 NM NW AND SE QUADRANTS. SEAS 12 FT OR
GREATER WITHIN 75 NM NE...50 NM SE...30 NM SW...60 NM NW QUADRANTS.
.EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL DEPRESSION GUILLERMO NEAR 25.5N 162.0W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.120 HOUR FORECAST POST-TROP/REMNT LOW NEAR 26.5N 166.5W.
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 13N177W 1007 MB MOVING W SLOWLY. ISOLATED MODERATE TO STRONG
TSTMS WITHIN 150 NM N SEMICIRCLE.
.24 HOUR FORECAST LOW DISSIPATED.

.LOW 24N155W 1011 MB MOVING W 15 KT. WINDS 20 TO 25 KT WITHIN 75 NM
NE QUADRANT.
.24 HOUR FORECAST LOW DISSIPATED. WINDS DIMINISHED TO 20 KT OR LESS.
TROUGH 26N159W TO 22N159W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 30N168E TO 27N163E NEARLY STATIONARY. ISOLATED MODERATE
TSTMS WITHIN 120 NM OF TROUGH.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 12N148W TO 06N157W TO 02N166W NEARLY STATIONARY. ISOLATED
MODERATE TO STRONG TSTMS WITHIN 420 NM OF TROUGH W OF 156W.
.24 HOUR FORECAST TROUGH LITTLE CHANGE.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 08N160E TO 05N165E TO 03N175E TO 00N179W NEARLY STATIONARY.
SCATTERED MODERATE TO STRONG TSTMS S OF 07N W OF 176E.
.24 HOUR FORECAST TROUGH 07N160E TO 00N178E.
.48 HOUR FORECAST TROUGH 06N160E TO 00N173E.

.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 02N TO 12N E OF 147W...AND WITHIN 240
NM OF LINE 15N160E TO 16N172E TO 30N178E.

$$
.HONOLULU HI




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