High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 221530
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC SUN OCT 22 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 22 2017.
24 HOUR FORECAST VALID 1200 UTC OCT 23 2017.
48 HOUR FORECAST VALID 1200 UTC OCT 24 2017.

.WARNINGS.

...GALE WARNING...
.FRONT 30N180W 29N173E 30N167E MOVING S 15 KT. WINDS 20 TO 25
KT N OF FRONT. SEE SEAS BELOW.
.24 HOUR FORECAST FRONT 30N158W 24N170W 24N176W 25N173E 30N165E.
WINDS 20 TO 30 KT N OF FRONT. WINDS 20 TO 25 KT E OF FRONT N OF
28N AND W OF 145W. SEE SEAS BELOW.
.48 HOUR FORECAST FRONT 30N152W 22N157W 18S165W 20N179E 26N168E.
WINDS 20 TO 35 KT E OF FRONT N OF 22N AND W OF 142W. WINDS 20 TO
30 KT N OF FRONT. SEE SEAS BELOW.

.SYNOPSIS AND FORECAST.

.TROUGH 29N154W 23N157W MOVING WNW SLOWLY.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 10N160E 13N169E NEARLY STATIONARY. ISOLATED MODERATE
TSTMS W OF 176E BETWEEN 05N AND 13N.
.24 HOUR FORECAST TROUGH 13N160E 17N166E.
.48 HOUR FORECAST TROUGH MOVED W OF FORECAST AREA.

.WINDS 20 KT OR LESS REMAINDER OF FORECAST AREA.

.SEAS 8 TO 10 FT N OF 10N W OF 160W...AND E OF LINE 08N140W
13N152W 25N148W 29N140W.
.24 HOUR FORECAST SEAS 12 TO 14 FT N OF 28N BETWEEN 163W AND 166E.
SEAS 8 TO 12 FT ELSEWHERE N OF LINE 10N160E 20N175E 15N175W
21N158W 10N151W 09N140W.
.48 HOUR FORECAST SEAS 12 TO 15 FT N OF LINE 30N149W 23N161W
22N180W 23N175E. SEAS 8 TO 12 FT ELSEWHERE N OF LINE 12N160E
20S170E 19N170W 23N157W 10N152W 09N140W.

.SEAS 8 FT OR LOWER REMAINDER OF FORECAST AREA.

.ITCZ 09N140W 10N152W 12N159W 10N171W 07N180W. ISOLATED MODERATE
TSTMS WITHIN 180 NM OF ITCZ.

$$

.FORECASTER POWELL. HONOLULU HI.


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