High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 231501
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC MON OCT 23 2017

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC OCT 23 2017.
24 HOUR FORECAST VALID 1200 UTC OCT 24 2017.
48 HOUR FORECAST VALID 1200 UTC OCT 25 2017.

.WARNINGS.

...GALE WARNING...
.FRONT 30N161W 25N168W 24N176W MOVING SE 20 KT. WINDS 20 TO 25 KT
N OF LINE 30N159W 25N180W 25N175E 30N164E.
.24 HOUR FORECAST FRONT 30N155W 25N156W 18N160W. WINDS 30 TO 45 KT
WITHIN 150 NM OF LINE 30N151W 25N154W...WINDS 20 TO 30 KT ELSEWHERE
N OF LINE 30N143W 23N150W 23N156W 30N153W. WINDS 20 TO 30 KT N OF
27N BETWEEN 160W AND 164W...WINDS 20 TO 25 KT ELSEWHERE N OF LINE
30N158W 20N163W 22N175E 30N170W.
.48 HOUR FORECAST FRONT 30N152W 25N151W 17N158W. WINDS 30 TO 35 KT
WITHIN 200 NM E OF FRONT N OF 24N...WINDS 20 TO 30 KT ELSEWHERE N OF
LINE 30N145W 22N150W 28N154W 30N162W.

.SYNOPSIS AND FORECAST.

.LOW 09N152W 1010 MB MOVING NW 15 KT. TROUGH FROM LOW TO 14N164W
10N170W. WINDS 20 TO 25 KT WITHIN 180 NM OF LOW NE QUADRANT.
SCATTERED STRONG TSTMS WITHIN 240 NM OF LOW.
.24 HOUR FORECAST LOW 14N156W 1009 MB. WINDS 20 TO 25 KT WITHIN 300
NM OF LOW SE SEMICIRCLE.
.48 HOUR FORECAST LOW DISSIPATED. WINDS DIMINISHED TO 20 KT OR LESS.

.ITCZ 09N140W 10N152W. ISOLATED MODERATE TSTMS WITHIN 120 NM OF ITCZ
E OF 145W.

.RIDGE 30N140W 24N150W 20N163W 23N178W MOVING SE SLOWLY AND ERODING
FROM THE W.

.SEAS 8 TO 12 FT N OF LINE 08N140W 10N153W 20N180W 10N160E.
.24 HOUR FORECAST SEAS 12 TO 16 FT N OF LINE 30N148W 25N155W
30N154W...SEAS 12 TO 17 FT N OF LINE 30N159W 22N160W 20N175E
30N172W...SEAS 8 TO 12 FT ELSEWHERE N OF LINE 10N140W 10N155W 30N160W
10N160E.
.48 HOUR FORECAST SEAS 12 TO 18 FT N OF LINE 30N148W 15N150W 21N165W
30N165W...SEAS 8 TO 12 FT ELSEWHERE N OF LINE 30N145W 15N155W 15N165E
25N160E.

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

$$
.HONOLULU FORECASTER.



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