High Seas Forecast
Issued by NWS

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FZPN40 PHFO 292225 CCA
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC MON MAY 29 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 MAY 29 2017.
24 HOUR FORECAST VALID 1800 UTC MAY 30 2017.
48 HOUR FORECAST VALID 1800 UTC MAY 31 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N155W TO 28N160W  MOVING E SLOWLY...
DISSIPATING.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 25N154W TO 21N156W MOVING W SLOWLY.
ISOLATED TSTMS WITHIN 120 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 27N156W TO 23N157W.
.48 HOUR FORECAST TROUGH 27N157W TO 26N159W TO 24N159W.

.TROUGH 23N156W TO 18N173W MOVING NW SLOWLY.
.24 HOUR FORECAST TROUGH 23N172W TO 19N176W.
.48 HOUR FORECAST TROUGH 26N175W TO 21N179W.

.TROUGH 25N173E TO 17N171E MOVING NW SLOWLY.
ISOLATED MODERATE TSTMS WITHIN 200 NM E OF TROUGH.
.24 HOUR FORECAST TROUGH 26N172E TO 20N168E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.24 HOUR FORECAST DEVELOPING GALE LOW W OF FORECAST WATERS
30N156E. OVER FORECAST WATERS...WINDS S TO SW 20 TO 25 KT N OF
27N W OF 162E. PLEASE SEE FZPN01 KWBC FOR MORE DETAILS.
.36 HOUR FORECAST LOW 30N160E 1005 MB. FRONT FROM LOW TO 26N158E
TO 23N154E. OVER FORECAST WATERS WINDS S TO SW 20 TO 25 KT N OF
26N W OF 167E. PLEASE SEE FZPN01 KWBC FOR MORE DETAILS.
.48 HOUR FORECAST LOW N OF FORECAST WATERS NEAR 31N161E 1007 MB.
ASSOCIATED FRONT FROM LOW TO 30N161E TO 27N160E. WINDS S TO SW 20
TO 25 KT N OF 26N W OF 167E.

.HIGH 28N175W 1020 MB MOVING E 20 KT. RIDGE 28N165W TO HIGH
TO 28N169E TO 27N160E. RIDGE W OF HIGH MOVING N SLOWLY AND
ERODING FROM W.
.24 HOUR FORECAST HIGH 28N166W 1022 MB. RIDGE FROM HIGH TO
28N180W.
.48 HOUR FORECAST HIGH AND RIDGE DISSIPATED.  NEW HIGH NEAR
30N172W 1020 MB WITH RIDGE TO 30N160W AND FROM HIGH TO
30N180W.

.RIDGE 28N140W TO 27N148W NEARLY STATIONARY.
.24 HOUR FORECAST NEW HIGH 28N142W 1024 MB. RIDGE FROM HIGH
TO 27N155W.
.48 HOUR FORECAST HIGH 28N148W 1025 MB. RIDGE FROM 28N140W
TO HIGH TO 28N155W.

.WINDS E AND NE 20 TO 25 KT BETWEEN 06N AND 14N E OF 155W.
.24 HOUR FORECAST WINDS E AND NE BETWEEN 04N AND 15N E OF
175W.
.48 HOUR FORECAST WINDS E AND NE BETWEEN 04N AND 5N E OF
180W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 FT OR LESS ENTIRE AREA.
.24 HOUR FORECAST SEAS 8 TO 9 FT BETWEEN 06N AND 12N E OF 152W.
.48 HOUR FORECAST SEAS 8 TO 9 FT BETWEEN 03N AND 14N E OF 175W.

.OTHERWISE SEAS 8 FT OR LESS.

.ITCZ 04N140W TO 03N160W TO 06N175E TO 05N160E. ISOLATED MODERATE
TSTMS WITHIN 200 NM N OF ITCZ BETWEEN 168W AND 180W.

$$

.FORECASTER LAU. HONOLULU HI.



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