High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 201030
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 UTC SUN MAY 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC MAY 20 2018.
24 HOUR FORECAST VALID 0600 UTC MAY 21 2018.
48 HOUR FORECAST VALID 0600 UTC MAY 22 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N151W 24N153W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH 30N150W 26N154W.
.48 HOUR FORECAST TROUGH LITTLE CHANGE.

.TROUGH 30N163W 24N166W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH LITTLE CHANGE.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 12N164E 09N160E MOVING NW 15 KT. SCATTERED MODERATE TSTMS
WITHIN 120 NM OF TROUGH.
.24 HOUR FORECAST TROUGH MOVED W OF AREA.

.48 HOUR FORECAST NEW FRONT 30N163E 29N160E.

.RIDGE 30N179E 26N160E NEARLY STATIONARY.

.NE TO E WINDS 20 TO 25 KT S OF LINE 21N140W 26N160W 21N160E AND
N OF LINE 10N140W 05N165W 14N160E.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT S OF LINE 21N140W
25N176W 19N160E AND N OF LINE 10N140W 07N180W 12N160E.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT S OF LINE 18N140W
27N180W 21N160E AND N OF LINE 11N140W 07N162W 10N172E 16N160E.

.SEAS 8 TO 9 FT N OF 05N AND S OF LINE 20N140W 23N148W 15N165W
08N171W 05N161W.
.24 HOUR FORECAST SEAS 8 TO 9 FT S OF 21N AND N OF LINE 21N155W
19N155W 11N140W. SEAS 8 TO 9 FT FROM 07N TO 15N BETWEEN 178W AND
162W.
.48 HOUR FORECAST SEAS 8 TO 9 FT FROM 10N TO 15N BETWEEN 143W AND
151W...AND FROM 06N TO 13N BETWEEN 169W AND 178E.

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

.ITCZ 08N140W 05N160W 03M178W. ISOLATED TO SCATTERED MODERATE
TSTMS WITHIN 120 NM OF ITCZ.

.ISOLATED MODERATE TSTMS FROM 19N TO 26N BETWEEN 164W AND
173W...AND FROM 08N TO 13N BETWEEN 174W TO 178E.

$$

.FORECASTER POWELL. HONOLULU HI.



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