High Seas Forecast
Issued by NWS

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131
FZPN40 PHFO 261536
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC THU APR 26 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC APR 26 2018.
24 HOUR FORECAST VALID 1200 UTC APR 27 2018.
48 HOUR FORECAST VALID 1200 UTC APR 28 2018.

.WARNINGS.

...GALE WARNING...
.COLD FRONT FROM 30N171W TO 27N179W MOVING ESE 10 KT. WINDS
INCREASING TO E TO NE 20 TO 25 KT OVER FORECAST WATERS N OF FRONT.
.24 HOUR FORECAST FRONT FROM 30N150W TO 28N165W TO 27N172W.
TROUGH FROM 24N160W TO 28N160W. WINDS N TO NE 20 TO 30 KT OVER
FORECAST WATERS N OF FRONT.
.36 HOUR FORECAST FRONT FROM 30N156W TO 27N158W TO 26N163W TO
24N167W. TROUGH FROM 20N161W TO 27N163W. WINDS NW TO NE 20 TO
30 KT OVER FORECAST WATERS N OF FRONT. WINDS INCREASING TO SE
TO S 20 TO 30 KT N OF 27N WITHIN 210 NM E OF FRONT.
.48 HOUR FORECAST FRONT FROM 30N152W TO 26N154W TO 23N157W.
TROUGH FROM 18N159W TO 21N163W TO 19N169W. TROUGH MERGED WITH
FRONT. WINDS NW TO NE 20 TO 30 KT OVER FORECAST WATERS N OF FRONT.
WINDS SE TO S 30 TO 40 KT N OF 26N WITHIN 210 NM E OF FRONT.
WINDS SE TO SW 20 TO 30 KT ELSEWHERE N OF 23N WITHIN 660 NM E
OF FRONT. ASSOCIATED SEAS INCLUDED BELOW.

.SYNOPSIS AND FORECAST.

.RIDGE FROM 30N163E TO 29N160E.
.48 HOUR FORECAST RIDGE FROM 30N171E TO 26N160E.

.OTHERWISE AND ELSEWHERE WINDS E TO NE 20 TO 30 KT WITHIN A POLYGON
BOUND BY 26N179W 16N155W 09N160W 11N179W 09N160E 20N160E 26N179W.
.24 HOUR FORECAST WIND NE 20 TO 30 KT WITHIN A POLYGON BOUND
BY 30N174E 30N172W 15N172W 09N160E 22N160E 30N174E.
.48 HOUR FORECAST WINDS NE TO E 20 TO 30 KT WITHIN A POLYGON BOUND
BY 30N169W 15N169W 11N164E 23N164E 30N169W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 TO 11 FT WITHIN A POLYGON BOUND BY 30N174E 30N159W 21N168W
13N160W 08N172E 08N160E 23N160E 30N174E.
.24 HOUR FORECAST SEAS 8 TO 12 FT WITHIN A POLYGON BOUND BY 30N172E
30N158W 23N167W 15N164W 09N176E 09N160E 24N160E 30N172E.
.48 HOUR FORECAST SEAS BUILDING TO 13 TO 16 FT N OF 28N BETWEEN
165W AND 158W. SEAS 8 TO 13 FT ELSEWHERE WITHIN A POLYGON BOUND BY
30N165E 30N144W 25N144W 15N169W 10N174E 10N160E 24N160E 30N165E.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ITCZ FROM 10N155W TO 09N161W TO 11N170W TO 09N179W TO 06N170E TO
06N160E. NUMEROUS STRONG TSTMS WITHIN 210 NM N OF CONVERGENCE LINE
W OF 179W. SCATTERED MODERATE TO STRONG TSTMS ELSEWHERE WITHIN
360 NM OF CONVERGENCE LINE W OF 179W. ALSO SCATTERED MODERATE
TSTMS WITHIN 240 NM OF CONVERGENCE LINE E OF 179W.

$$

.FORECASTER BEDAL. HONOLULU HI.



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