High Seas Forecast
Issued by NWS

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303
FZPN40 PHFO 232253
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC THU FEB 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 23 2017.
24 HOUR FORECAST VALID 1800 UTC FEB 24 2017.
48 HOUR FORECAST VALID 1800 UTC FEB 25 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT FROM 30N173W TO 25N178W TO 20N179E. FRONT MOVING E 15 KT N
OF 26N...NEARLY STATIONARY ELSEWHERE. NE WINDS 20 TO 25 KT WITHIN
180 NM N OF FRONT. ISOLATED MODERATE TSTMS WITHIN 180 NM SE OF
FRONT E OF 176E.
.24 HOUR FORECAST FRONT FROM 30N165W TO 28N171W TO 24N175E. NE
WINDS 20 TO 25 KT WITHIN 180 NM N OF FRONT E OF 179E.
.48 HOUR FORECAST FRONT FROM 30N158W TO 27N163W TO 25N172W. WINDS
DIMINISHED TO 20 KT OR LESS.

.FRONT FROM 30N147W TO 27N152W TO 26N159W MOVING SE 10 KT.
ISOLATED TSTMS WITHIN 90 NM E OF FRONT N OF 29N.
.24 HOUR FORECAST FRONT FROM 30N143W TO 28N144W TO 25N148W. WINDS
20 TO 25 KT WITHIN 180 NM NW OF FRONT.
.48 HOUR FORECAST FRONT MOVED E OF AREA AND MERGED WITH TROUGH
DESCRIBED BELOW. WINDS DIMINISHED TO 20 KT OR LESS.

.TROUGH FROM 26N143W TO 21N146W TO 15N147W MOVING E 10 KT. WINDS
20 TO 25 KT FROM 22N TO 24N E OF 142W. SCATTERED MODERATE TSTMS
WITHIN 240 NM E OF TROUGH N OF 19N. ISOLATED TSTMS WITHIN 90 NM
OF TROUGH S OF 19N.
.24 HOUR FORECAST TROUGH FROM 28N142W TO 19N143W TO 13N146W.
WINDS DIMINISHED TO 20 K OR LESS.
.48 HOUR FORECAST TROUGH FROM 20N140W TO 16N142W.

.NE TO E WINDS 20 TO 25 KT FROM 12N TO 16N BETWEEN 156W AND
178E...AND FROM 06N TO 14N W OF 178E.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 06N TO 15N W OF
168E.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 08N TO 16N W OF
164E.

.RIDGE FROM 30N164W TO 25N176W NEARLY STATIONARY AND ERODING FROM
THE W.

.OTHERWISE WINDS 20 KT OR LESS OVER REMAINDER OF AREA.

.SEAS 12 TO 14 FT N OF A LINE FROM 30N172W TO 23N178E TO 20N168E.
SEAS 8 TO 12 FT ELSEWHERE N OF A LINE FROM 30N143W TO 08N154W TO
02N176W TO 06N171E...AND N OF 14N W OF 171E.
.24 HOUR FORECAST SEAS 8 TO 11 FT N OF A LINE FROM 19N140W TO
02N178E TO 06N160E.
.48 HOUR FORECAST SEAS 8 TO 10 FT N OF A LINE FROM 24N140W TO
06N170W TO 05N160E.

.OTHERWISE SEAS 8 FT OR LESS OVER REMAINDER OF AREA.

.ITCZ FROM 08N140W TO 06N154W TO 06N162W TO 03N179W. ISOLATED
MODERATE TSTMS WITHIN 90 NM OF ITCZ.

.SCATTERED MODERATE TSTMS FROM 03N TO 07N W OF 170E...AND FROM 01N
TO 06N BETWEEN 170E AND 179W.

$$

.FORECASTER BRAVENDER. HONOLULU HI.



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