000
FZPN40 PHFO 201534
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC TUE APR 20 2021

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 APR 20 2021.
24 HOUR FORECAST VALID 1200 UTC APR 21 2021.
48 HOUR FORECAST VALID 1200 UTC APR 22 2021.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 18N161E 1010 MB MOVING W SLOWLY. TROUGH 14N170E TO LOW MOVING
SW SLOWLY.
.24 HOUR FORECAST LOW MOVED W OF AREA. TROUGH DISSIPATED.

.FRONT 30N159W 25N164W...THENCE TROUGH TO 19N166W. FRONT MOVING E 20
KT. TROUGH NEARLY STATIONARY. WINDS 20 TO 25 KT N OF LINE 30N147W
22N156W 27N161W 30N165W.
.24 HOUR FORECAST FRONT 30N152W 23N160W...THENCE TROUGH TO 19N166W.
S WINDS 20 TO 25 KT N OF LINE 30N148W 28N152W 30N152W.
.48 HOUR FORECAST FRONT WEAKENED TO TROUGH 30N151W 23N158W. WINDS
DIMINISHED TO 20 KT OR LESS.

.FRONT JUST W OF AREA MOVING E 10 KT.
.24 HOUR FORECAST FRONT 30N163E 29N160E.
.48 HOUR FORECAST FRONT 30N171E 17N160E.

.ITCZ 05N140W 03N154W 06N170W 02N173E. ISOLATED MODERATE TSTMS
WITHIN 90 NM OF ITCZ.

.RIDGE 30N144W 24N150W 22N163W MOVING SE SLOWLY.

.RIDGE 23N168W 30N178W MOVING E 10 KT.

.RIDGE 30N165E 27N160E MOVING SE 10 KT.

.RIDGE 09N170E 00N160E NEARLY STATIONARY.

.E WINDS 20 TO 25 KT BOUNDED BY 30N165E 25N175W 20N175E 25N165E
30N170E. NE WINDS 20 TO 25 KT E OF LINE 05N140W 10N170W 28N140W.
.24 HOUR FORECAST E TO SE WINDS 20 TO 25 KT WITHIN 180 NM OF LINE
23N172W 24N174E 27N169E 30N169E. NE WINDS 20 TO 25 KT FROM 13N TO 06N
BETWEEN 150W AND 170W.
.48 HOUR FORECAST SE TO S WINDS 20 TO 30 KT N OF LINE 30N177W
20N170W 20N180W 30N170E. NE WINDS 20 TO 25 KT FROM 15N TO 05N
BETWEEN 155W AND 170W.

.SEAS 8 TO 9 FT E OF LINE 05N140W 08N165W 28N140W...N OF 20N W OF
180W AND N OF LINE 30N163W 29N170W 30N177W.
.24 HOUR FORECAST SEAS 8 TO 9 FT E OF LINE 07N140W 08N165W
25N140W...N OF LINE 30N157W 26N168W 30N167W AND W OF LINE 27N160E
23N168E 21N160E.
.48 HOUR FORECAST SEAS 8 TO 9 FT N OF LINE 30N178E 21N176W 30N168E.
SEAS 8 FT FROM 18N TO 07N E OF 170W.

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

.ISOLATED MODERATE TSTMS FROM 19N TO 17N BETWEEN 174E AND 172E.

$$
.HONOLULU FORECASTER.