High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 291057
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 UTC MON MAY 29 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC MAY 29 2017.
24 HOUR FORECAST VALID 0600 UTC MAY 30 2017.
48 HOUR FORECAST VALID 0600 UTC MAY 31 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW APPROACHING FORECAST AREA FROM W.
.48 HOUR FORECAST LOW JUST W OF FORECAST AREA NEAR 30N157E 1006 MB.
WINDS INCREASING TO SW 20 TO 25 25 KT N OF 26N W OF 163E.

.TROUGH FROM 30N140W TO 28N145W MOVING NE SLOWLY.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 21N155W TO 26N152W MOVING NW 10 KT. SCATTERED MODERATE
TSTMS WITHIN 150 NM OF TROUGH AXIS.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 18N171W TO 22N165W TO 29N160W. TROUGH NEARLY STATIONARY
N OF 22N AND MOVING W 10 KT S OF 165W.
.24 HOUR FORECAST TROUGHS FROM 19N174W TO 22N171W AND ALSO FROM 30N154W
TO 26N159W.
.48 HOUR FORECAST PRIMARY TROUGH FROM 22N177W TO 25N174W. SECONDARY
TROUGH DISSIPATED.

.TROUGH FROM 17N171E TO 21N173E TO 24N175E MOVING NW 10 KT. ISOLATED
MODERATE TSTMS WITHIN 150 NM OF TROUGH AXIS.
.24 HOUR FORECAST TROUGH FROM 21N170E TO 26N174E.
.48 HOUR FORECAST TROUGH FROM 25N170E TO 30N173E.

.TROUGH FROM 20N162E TO 23N163E TO 26N165E MOVING WNW SLOWLY. ISOLATED
MODERATE TSTMS WITHIN 150 NM OF TROUGH AXIS.
.24 HOUR FORECAST TROUGH DISSIPATED.

.HIGH NEAR 29N177E 1019 MB. RIDGES FROM HIGH TO 27N165W AND FROM HIGH
TO 28N167E TO 27N160E.
.24 HOUR FORECAST HIGH NEAR 28N177E 1021 MB. RIDGES FROM HIGH TO 27N165W
AND FROM HIGH TO 28N167E.
.48 HOUR FORECAST HIGH NEAR 29N171E 1021 MB. RIDGE FROM HIGH TO 29N177E.

.HIGH DEVELOPING OVER FORECAST AREA.
.48 HOUR FORECAST HIGH NEAR 28N143W 1025 MB.

.OTHERWISE WINDS INCREASING GREATER THAN 20 KT.
.24 HOUR FORECAST WINDS E TO NE 20 TO 25 KT FROM 15N TO 07N E OF 150W.
.48 HOUR FORECAST WINDS E TO NE 20 TO 25 KT FROM 15N TO 07N E OF 170W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS BUILDING TO HIGHER THAN 8 FT.
.24 HOUR FORECAST SEAS 8 TO 9 FT FROM 13N TO 05N E OF 155W.
.48 HOUR FORECAST SEAS 8 TO 9 FT FROM 13N TO 05N E OF 175W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ITCZ FROM 06N140W TO 07N145W TO 04N154W...AND ALSO FROM 06N165W TO
05N177W TO 07N174E. SCATTERED MODERATE TO STRONG TSTMS WITHIN 240 NM
OF LINE OF CONVERGENCE BETWEEN 174E AND 165W.

.OTHERWISE ISOLATED MODERATE TO STRONG TSTMS WITHIN A POLYGON BOUND
BY 23N151W 21N141W 11N146W 11N153W 18N156W 23N151W.

$$

.FORECASTER BEDAL. HONOLULU HI.



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