The High Seas Forecast for the Central North Pacific

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FZPN40 PHFO 050445
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC WED AUG 05 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 05 2015.
24 HOUR FORECAST VALID 0000 UTC AUG 06 2015.
48 HOUR FORECAST VALID 0000 UTC AUG 07 2015.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM GUILLERMO NEAR 20.1N 149.7W MOVING WNW 08 KT.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE
WINDS WITHIN 150 NM NE...110 NM SE...60 NM SW...90 NM NW. SEAS 12 FT
OR GREATER WITHIN 300 NM NE...180 NM SE...120 NM SW...300 NM NW.
WINDS 20 TO 33 KT ELSEWHERE WITHIN 240 NM N AND NE QUADRANTS...AND
WITHIN 150 NM ELSEWHERE OF CENTER. SEAS 8 TO 12 FT ELSEWHERE FROM
17N TO 29N BETWEEN 143W AND 158W. SCATTERED MODERATE TSTMS WITHIN
150 NM OF TROPICAL STORM GUILLERMO.
.24 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 21.5N 152.7W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE
WINDS WITHIN 100 NM NE...70 NM SE...30 NM SW...60 NM NW. SEAS 12 FT
OR GREATER WITHIN 270 NM NE...180 NM SE...120 NM SW...270 NM NW.
WINDS 20 TO 33 KT ELSEWHERE WITHIN 250 NM NE AND E QUADRANTS...150
NM NW QUADRANTS...AND 90 NM ELSEWHERE OF CENTER. SEAS 8 TO 12 FT
ELSEWHERE N OF 18N BETWEEN 147W AND 160W.
.48 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 22.9N 156.5W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE
WINDS WITHIN 60 NM NE...30 NM SE...0 NM SW...30 NM NW. SEAS 12 FT
OR GREATER WITHIN 240 NM NE...150 NM SE...120 NM SW...240 NM
NW.WINDS 20 TO 33 KT ELSEWHERE WITHIN 240 NM E AND SE
QUADRANTS...150 NM NW QUADRANT AND WITHIN 90 NM ELSEWHERE OF CENTER.
SEAS 8 TO 12 FT ELSEWHERE N OF 22N BETWEEN 150W AND 164W.
.72 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 24.3N 160.7W.
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 165.0W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.120 HOUR FORECAST TROPICAL DEPRESSION GUILLERMO NEAR 28.0N 169.5W.
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 05N168E 1007 MB MOVING W 10 KT. TROUGH FROM 10N160E TO LOW TO
02N180E MOVING W SLOWLY. ISOLATED MODERATE TSTMS WITHIN 120 NM OF
LOW.
.24 HOUR FORECAST LOW 05N160E 1007 MB. TROUGH FROM LOW TO 02NS172E.
.48 HOUR FORECAST LOW MOVED W OF FORECAST AREA. TROUGH FROM 05N160E
TO 03N172E.

.LOW 05N166W 1008 MB MOVING W SLOWLY. TROUGH FROM 02N180W TO LOW TO
10N154W MOVING W SLOWLY. ISOLATED MODERATE TSTMS S OF 07N BETWEEN
155W AND 180W.
.24 HOUR FORECAST LOW 05N169W 1008 MB. TROUGH FROM 02N180W TO LOW TO
12N156W.
.48 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 03N180W TO 05N170W TO
12S163W.

.FRONT FROM 30N176E TO 28N160E NEARLY STATIONARY AND DISSIPATING.
ISOLATED MODERATE TSTMS WITHIN 60 NM OF FRONT.
.24 HOUR FORECAST FRONT DISSIPATED.

.TROUGH FROM 29N159W TO 23N159W MOVING W SLOWLY. WINDS 20 TO 25 KT
AND SEAS 8 TO 9 FT FROM 25N TO 28N BETWEEN 155W AND 160W. ISOLATED
MODERATE TSTMS WITHIN 60 NM OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 28N163W TO 24N162W. WINDS DIMINISHED
TO 20 KT OR LESS AND SEAS DIMINISHED TO 8 FT OR LESS.
.48 HOUR FORECAST TROUGH DISSIPATED.

.RIDGE FROM 30N166W TO 26N162E MOVING N SLOWLY.

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

.ISOLATED MODERATE TSTMS FROM 12N TO 17N BETWEEN 172E AND 170W.

.ITCZ 07N140W 06N147W. ISOLATED MODERATE TSTMS WITHIN 180 NM OF ITCZ.

$$
.FORECASTER BURKE. HONOLULU HI.




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