High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 202328
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC MON FEB 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC FEB 20 2017.
24 HOUR FORECAST VALID 1800 UTC FEB 21 2017.
48 HOUR FORECAST VALID 1800 UTC FEB 22 2017.

.WARNINGS.

...GALE WARNING...
.NE TO E WINDS 25 TO 35 KT AROUND THE MAIN HAWAIIAN ISLANDS. FOR
DETAILS...SEE THE COASTAL WATERS FORECAST ISSUED BY NWS HONOLULU
UNDER AWIPS HEADER CWFHFO AND WMO HEADER FZHW50 PHFO.
.24 HOUR FORECAST WINDS DIMINISHED AND MERGED WITH CONDITIONS
OTHERWISE DESCRIBED BELOW.

...GALE WARNING...
.COLD FRONT RAPIDLY APPROACHING FORECAST AREA FROM W. WINDS
INCREASING TO S TO SW 20 TO 30 KT OVER FORECAST WATERS NW OF A
LINE FROM 30N165E TO 27N160E.
.24 HOUR FORECAST FRONT FROM 30N163E TO 28N160E. WIND SW 30
TO 45 KT WITHIN 240 NM E OF FRONT. WINDS W TO NW 30 TO 45 KT
OVER FORECAST WATERS NW OF FRONT. WINDS S TO W 20 TO 30 KT
ELSEWHERE NW OF A LINE FROM 30N179W TO 24N170E TO 23N160E.
.36 HOUR FORECAST FRONT FROM 30N171E TO 26N166E TO 22N160E. WINDS SW
TO NW 30 TO 35 KT N OF 28N WITHIN 270 NM EITHER SIDE OF FRONT. WINDS
S TO W 20 TO 30 KT ELSEWHERE OVER FORECAST WATERS NW OF A LINE FROM
30N176W TO 25N175E TO 22N160E.
.48 HOUR FORECAST FRONT FROM 30N179E TO 26N173E. WINDS S TO NW 20
TO 30 KT WITHIN 270 NM EITHER SIDE OF FRONT.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 23N140W TO 21N145W TO 19N152W MOVING ESE 15 KT THENCE
A DISSIPATING STATIONARY FRONT TO 18N161W. ASSOCIATED WINDS INCLUDED
BELOW.
.24 HOUR FORECAST FRONT FROM 21N140W TO 20N145W TO 19N152W.
.48 HOUR FORECAST FRONT DISSIPATED.

.COLD FRONT FROM 30N178W TO 27N177E TO 24N170E MOVING ENE 30 KT.
WINDS S TO SW 20 TO 30 KT N OF 27N WITHIN 270 NM E OF FRONT. ALSO
WINDS NW 20 TO 30 KT OVER FORECAST WATERS N OF FRONT E OF 177E.
ISOLATED MODERATE TO STRONG TSTMS WITHIN 120 NM AND 600 NM E OF FRONT.
.24 HOUR FORECAST FRONT FROM 30N165W TO 27N172W. ASSOCIATED WINDS
DIMINISHED TO 20 KT OR LESS.
.48 HOUR FORECAST FRONT FROM 30N151W TO 29N158W.

.HIGH NEAR 30N161W 1028 MB MOVING NE 30 KT. RIDGES FROM HIGH TO 24N144W
AND FROM HIGH TO 22N177E.
.24 HOUR FORECAST HIGH NEAR 30N150W 1032 MB. RIDGE FROM HIGH TO 28N164W.
.36 HOUR FORECAST HIGH DISSIPATED N OF FORECAST AREA.

.HIGH NEAR 29N167E 1023 MB MOVING ENE 45 KT. RIDGE FROM HIGH TO 27N160E.
.12 HOUR FORECAST HIGH N OF FORECAST AREA. RIDGE FROM 30N173E TO 22N160E.
.24 HOUR FORECAST RIDGE FROM 30N175W TO 25N175E TO 19N161E.
.48 HOUR FORECAST RIDGE FROM 30N165W TO 21N175E.

.OTHERWISE AND ELSEWHERE WINDS E TO NE 20 TO 30 KT FROM 23N TO 03N
BETWEEN 175W AND 145W.
.24 HOUR FORECAST WINDS E TO NE 20 TO 30 KT FROM FROM 23N TO 03N
BETWEEN 179W AND 141W.
.48 HOUR FORECAST WINDS E TO NE 20 TO 30 KT WITHIN A POLYGON BOUND
BY 25N165W 25N140W 20N140W 05N165W 06N170E 25N165W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 12 TO 19 FT OVER FORECAST WATERS NW OF A LINE FROM 25N140W TO
21N152W. SEAS 8 TO 12 FT ELSEWHERE WITHIN A POLYGON BOUND BY 30N165W
30140W 24N140W 05N160W 09N177E 17N170E 21N177W 03N165W. ALSO SEAS 8 TO
12 FT NW OF A LINE FROM 30N175W TO 24N174E TO 23N160E.
.24 HOUR FORECAST SEAS 12 TO 22 FT NW OF A LINE FROM 30N170E TO 26N160E.
SEAS 8 TO 12 FT ELSEWHERE NW OF A LINE FROM 30N163W TO 25N170E
TO 24160E. SEAS 8 TO 12 FT WITHIN A POLYGON BOUND BY 28N140W 12N140W
06N160W 06N175W 09N175E 23N175W 20N155W 28N140W.
.48 HOUR FORECAST SEAS 12 TO 18 FT NW OF A LINE FROM 30N178E TO 19N160E.
SEAS 8 TO 12 FT ELSEWHERE NW OF A LINE FROM 30N175W TO 16N160E. ALSO
SEAS 8 TO 12 FT WITHING A POLYGON BOUND BY 30N163W 30N152W 22N160W
19N148W 04N167W 08N173E 22N176W 30N163W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ITCZ FROM 03N140W 01N148W 02N155W.

$$

.FORECASTER BEDAL. HONOLULU HI.


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