High Seas Forecast
Issued by NWS

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FZPN40 PHFO 312303 CCA
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC FRI JUL 31 2015

TSTMS ADDED.

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

PAN PAN

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 1800 UTC JUL 31 2015.
24 HOUR FORECAST VALID 1800 UTC AUG 01 2015.
48 HOUR FORECAST VALID 1800 UTC AUG 02 2015.

.WARNINGS.

...HURRICANE WARNING...
.24 HOUR FORECAST HURRICANE GUILLERMO NEAR 14.0N 140.1W. MAXIMUM
SUSTAINED WINDS 100 KT GUSTS 120 KT. TROPICAL STORM FORCE WINDS
WITHIN 120 NM NE...100 NM SE...60 NM SW...90 NM NW. SEAS 12 FT OR
GREATER WITHIN 240 NM NE QUADRANT...180 NM SE QUADRANT...120 NM SW
QUADRANT...AND 210 NM NW QUADRANT WITH SEAS TO 30 FT. ELSEWHERE
WITHIN 210 NM E AND 150 NM SW SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8
TO 11 FT.
.48 HOUR FORECAST HURRICANE GUILLERMO NEAR 15.5N 144.3W. MAXIMUM
SUSTAINED WINDS 80 KT GUSTS 100 KT. TROPICAL STORM FORCE WINDS
WITHIN 100 NM NE...100 NM SE...60 NM SW...90 NM NW. SEAS 12 FT OR
GREATER WITHIN 240 NM NE QUADRANT...180 NM SE QUADRANT...120 NM SW
QUADRANT...AND 210 NM NW QUADRANT WITH SEAS TO 30 FT. ELSEWHERE
WITHIN 210 NM E AND 150 NM SW SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8
TO 11 FT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.72 HOUR FORECAST HURRICANE GUILLERMO NEAR 17.0N 147.0W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT.
.96 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 18.5N 150.0W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT.
.120 HOUR FORECAST TROPICAL STORM GUILLERMO NEAR 19.5N 153.0W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.

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

.SYNOPSIS AND FORECAST.

.LOW 16N148W 1009 MB MOVING SW SLOWLY. TROUGH 18N149W THROUGH LOW TO
11N145W. NE TO E WINDS 20 TO 25 KT WITHIN 120 NM OF LOW NE
QUADRANT. SEAS 8 TO 10 FT FROM 23N TO 15N E OF 148W.
.24 HOUR FORECAST LOW 13N151W 1009 MB. TROUGH 17N153W THROUGH LOW
TO 11N149W. WINDS DIMINISHED TO 20 KT OR LESS. SEAS 8 TO 9 FT FROM
23N TO 16N BETWEEN 148W AND 153W.
.48 HOUR FORECAST LOW 13N156W 1008 MB. TROUGH 15N159W THROUGH LOW TO
11N153W. SEAS DIMINISHED TO LESS THAN 8 FT.

.LOW 07N168E 1007 MB MOVING W SLOWLY. TROUGH 00N176E THROUGH LOW
TO 09N160E. SCATTERED MODERATE TSTMS S OF 12S W OF 180W.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH 00N177E TO 09N160E.
.48 HOUR FORECAST TROUGH 00N176E TO 08N160E.

.TROUGH 11N159W 01N163W MOVING W 15 KT. NE WINDS 20 TO 25 KT FROM
17N TO 11N BETWEEN 155W AND 163W. SEAS 8 TO 10 FT FROM 19N TO 11N
BETWEEN 154W AND 163W. ISOLATED MODERATE TSTMS WITHIN 150 NM OF
TROUGH.
.24 HOUR FORECAST TROUGH 13N167W 07N170W 01N172W. WINDS 20 TO 25 KT
FROM 17N TO 13N BETWEEN 167W AND 169W. SEAS 8 TO 10 FT FROM 18N TO
12N BETWEEN 161W AND 168W.
.48 HOUR FORECAST LOW 13N173W 1007 MB. TROUGH 16N172W THROUGH LOW TO
08N175W 02N173W. WINDS DIMINISHED TO 20 KT OR LESS. SEAS LESS THAN 8
FT.

.TROUGH 30N172W 23N175W 15N176W MOVING NW SLOWLY. ISOLATED STRONG
TSTMS WITHIN 240 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 30N173W 20N179W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.ITCZ 05N140W 09N158W MOVING SW 15 KT. SCATTERED MODERATE TSTMS
WITHIN 90 NM OF ITCZ.

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

$$
.HONOLULU HI.









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