High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 041054
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC AUG 04 2015.
24 HOUR FORECAST VALID 0600 UTC AUG 05 2015.
48 HOUR FORECAST VALID 0600 UTC AUG 06 2015.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM GUILLERMO NEAR 18.9N 147.7W. MAXIMUM SUSTAINED WINDS
60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 140 NM NE...90
NM SE...50 NM SW...75 NM NW QUADRANTS. SEAS 12 FT OR GREATER WITHIN
300 NM NE...180 NM SE...150 NM SW...300 NM NW QUADRANTS. WINDS 20 TO
33 KT ELSEWHERE WITHIN 270 NM N SEMICIRCLE...180 NM SE AND 90 NM SE
QUADRANTS. SEAS 8 TO 12 FT ELSEWHERE FROM 16N TO 25N BETWEEN 142W
AND 153W. SCATTERED MODERATE TO STRONG TSTMS WITHIN 150 NM N AND NE
QUADRANTS.
.24 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 20.5N 150.7W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE
WINDS WITHIN 100 NM NE...65 NM SE...30 NM SW...60 NM NW QUADRANTS.
SEAS 12 FT OR GREATER WITHIN 270 NM NE...180 NM SE...150 NM SW...
270 NM NW QUADRANTS. WINDS 20 TO 33 KT ELSEWHERE WITHIN 270 NM NE
AND 90 NM SW QUADRANTS...AND WITHIN 180 NM ELSEWHERE OF CENTER. SEAS
8 TO 12 FT ELSEWHERE FROM 17N TO 28N BETWEEN 144W AND 156W.
.48 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 22.2N 154.5W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE
WINDS WITHIN 60 NM NE...30 NM SE...30 NM NW QUADRANTS. SEAS 12 FT OR
GREATER WITHIN 210 NM N SEMICIRCLE AND 120 NM ELSEWHERE OF CENTER.
WINDS 20 TO 33 KT ELSEWHERE WITHIN 180 NM N SEMICIRCLE AND SE
QUADRANT...AND WITHIN 60 NM ELSEWHERE OF CENTER. SEAS 8 TO 12 FT
ELSEWHERE IN AREA BOUNDED BY 30N159W 30N152W 27N148W 19N149W 19N154W
23N163W 28N163W 30N159W.
.72 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 24.2N 158.5W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL DEPRESSION GUILLERMO NEAR 26.0N 163.0W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.120 HOUR FORECAST TROPICAL DEPRESSION GUILLERMO NEAR 27.0N 167.5W.
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 04N173E 1006 MB MOVING W SLOWLY. TROUGH 08N160E TO 05N164E TO
LOW TO 03N179E MOVING W SLOWLY. ISOLATED MODERATE TSTMS S OF 10N
W OF 177W.
.24 HOUR FORECAST LOW 04N170E 1006 MB. TROUGH 06N160E TO 03N164E TO
LOW TO 04N176E.
.48 HOUR FORECAST LOW 02N164E 1007 MB. TROUGH 03N160E TO LOW TO
01N170E.

.LOW 24N156W 1012 MB MOVING W 10 KT. WINDS 20 TO 25 KT AND SEAS
8 TO 9 FT WITHIN 180 NM N SEMICIRCLE. ISOLATED MODERATE TSTMS FROM
24N TO 28N BETWEEN 150W AND 157W.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH 27N161W TO 22N161W. WINDS
DIMINISHED TO 20 KT OR LESS. SEAS SUBSIDED TO 8 FT OR LESS.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 30N168E TO 27N162E NEARLY STATIONARY. ISOLATED MODERATE
TSTMS N OF 28N BETWEEN 162E AND 170W.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 16N148W TO 08N155W TO 03N165W TO 02N174W MOVING W SLOWLY
E OF 165W AND NEARLY STATIONARY ELSEWHERE. ISOLATED MODERATE TSTMS
S OF 16N E OF 151W...S OF 10N BETWEEN 151W AND 160W...AND S OF 18N
BETWEEN 160W AND 176W.
.24 HOUR FORECAST TROUGH 10N160W TO 02N164W TO 03N173W.
.48 HOUR FORECAST TROUGH 09N163W TO 04N165W.

.RIDGE 30N169W TO 28N176W 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 20N W OF 170E...AND FROM 10N TO
27N BETWEEN 170E AND 174W.

$$

.HONOLULU HI




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