High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 170329
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC SUN JAN 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC JAN 17 2021.
24 HOUR FORECAST VALID 0000 UTC JAN 18 2021.
48 HOUR FORECAST VALID 0000 UTC JAN 19 2021.

.WARNINGS.

...GALE WARNING...
.FRONT 27N172W 24N180E 26N160E NEARLY STATIONARY. SECOND FRONT JUST
N OF AREA MOVING SE 30 KT AND MERGING WITH FIRST FRONT. NE WINDS 25
TO 35 KT N OF FRONT.
.24 HOUR FORECAST MERGED FRONT 30N154W 22N160W 17N170W 17N176W. NWINDS
30 TO 35 KT WITHIN 120 NM N OF FRONT BETWEEN 175E AND 159W... WINDS
20 TO 30 KT ELSEWHERE N OF LINE 30N147W 14N170W 13N180W 20N170E 26N160E.
.48 HOUR FORECAST FRONT 30N148W 20N155W 15N160W. WINDS 20 TO 35 KT
BOUNDED BY 30N167W 30N148W 02N180W 04N160E 16N160E 30N167W.

.SYNOPSIS AND FORECAST.

.TROUGH 30N148W 27N157W 22N164W MOVING NW 10 KT.
.24 HOUR FORECAST TROUGH DISSIPATED. SEE WINDS WITH GALE WARNING ABOVE.
.48 HOUR FORECAST NEW FRONT 30N164E 30N160E. SE TO S WINDS 20 TO 30
KT N OF LINE 30N173W 25N178E 26N166E 30N167E.

.ITCZ 06N140W 07N145W 04N162W 06N170E 05N160E. SCATTERED MODERATE TSTMS
WITHIN 150 NM N OF ITCZ E OF 140W. ISOLATED MODERATE TSTMS WITHIN 150
NM OF ITCZ W OF 170E.

.HIGH 23N167E 1017 MB NEARLY STATIONARY. RIDGE 20N178E THROUGH HIGH
TO 24N160E.
.24 HOUR FORECAST HIGH DISSIPATED.

.RIDGE 30N160W 23N167W 22N174W MOVING SE 15 KT.

.RIDGE 30N143W 23N152W MOVING NE 10 KT AND ERODING FROM THE W.

.NE WINDS 20 TO 25 KT S OF 15N W OF 170E. E WINDS 20 TO 25 KT S OF
10N BETWEEN 170E AND 160W... AND FROM 08N TO 15N BETWEEN 150W AND 140W.
.24 HOUR FORECAST NE WINDS 20 TO 25 KT FROM 05N TO 20N W OF 170W. E
WINDS 20 TO 25 KT S OF 05N W OF 170E.
.48 HOUR FORECAST SEE WINDS WITH GALE WARNING. E WINDS 20 TO 25 KT
S OF 04S W OF 170W.

.SEAS 20 TO 25 FT N OF LINE 30N147W 20N158W 20N165W 30N163W...SEAS 12
TO 20 FT ELSEWHERE N OF LINE 30N145W 12N165W 13N180W 30N175W...SEAS
LESS THAN 8 FT S OF 08N W OF 170E AND FROM 26N TO 17N W OF 170E...SEAS
8 TO 13 FT ELSEWHERE.
.24 HOUR FORECAST SEAS 18 TO 22 FT N OF LINE 30N163W 23N168W 23N176W
30N178W...SEAS 12 TO 18 FT ELSEWHERE N OF LINE 15N140W 05N150W 08N167W
23N154W 17N173W 18N166E. SEAS 8 TO 12 FT ELSEWHERE.
.48 HOUR FORECAST SEAS 12 TO 21 FT N OF LINE 30N150W 20N156W 06N175E
17N177E 30N171E...SEAS 8 TO 12 FT ELSEWHERE.

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

$$

.FORECASTER SHIGESATO. HONOLULU HI.


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