High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 230330
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC FRI FEB 23 2018

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 FEB 23 2018.
24 HOUR FORECAST VALID 0000 UTC FEB 24 2018.
48 HOUR FORECAST VALID 0000 UTC FEB 25 2018.

.WARNINGS.

...GALE WARNING...
.TROUGH 30N167W 21N165W 08N171W MOVING W SLOWLY N OF 24N AND NEARLY
STATIONARY ELSEWHERE. E TO SE WINDS 20 TO 30 KT E OF LINE 10N140W
16N155W 30N156W. SEE SEAS BELOW. ISOLATED MODERATE TSTMS WITHIN 600
NM E OF TROUGH BETWEEN 12N AND 24N.
.24 HOUR FORECAST TROUGH 30N168W 19N165W 15N167W 09N171W. E TO SE
WINDS 20 TO 30 KT E OF LINE 08N140W 18N160W 20N163W. SEE SEAS BELOW.
.48 HOUR FORECAST TROUGH 30N168W 20N169W 10N172W. E TO SE WINDS 30 TO
35 KT N OF 25N BETWEEN 157W AND 165W. E WINDS ELSEWHERE E OF LINE
09N140W 09N158W 30N164W. SEE SEAS BELOW.

.SYNOPSIS AND FORECAST.

.TROUGH 30N176E 24N175E MOVING SW 10 KT.
.24 HOUR FORECAST TROUGH DISSIPATED.

.48 HOUR FORECAST NEW WEAK FRONT 30N165E 28N164E 28N160E.

.RIDGE 30N169E 27N160E MOVING NNW SLOWLY.

.NE TO E WINDS 20 TO 25 KT FROM 08N TO 20N W OF 178W.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT W OF 178W BETWEEN 05N
AND 21N.
.48 HOUR FORECAST NE WINDS 20 TO 25 KT W OF 178E BETWEEN 07N AND 19N.

.SEAS 8 TO 11 FT N AND E OF LINE 09N140W 12N161W 07N175E 13N163E
21N179W 30N174W.
.24 HOUR FORECAST SEAS 8 TO 11 FT N OF LINE 06N140W 10N158W 30N161W.
SEAS 8 TO 9 FT W OF 180W BETWEEN 07N AND 18N.
.48 HOUR FORECAST SEAS 8 TO 12 FT N OF LINE 05N140W 03N145W 05N157W
30N165W. SEAS 8 TO 9 FT W OF 175E BETWEEN 05N AND 17N.

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

.ITCZ 07N140W 07N152W 09N159W. ISOLATED MODERATE TSTMS WITHIN 180 NM
N OF ITCZ E OF 145W.

.ISOLATED MODERATE TSTMS FROM 01N TO 11N BETWEEN 172W AND 171E.

$$

.FORECASTER POWELL. HONOLULU HI.


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