High Seas Forecast
Issued by NWS

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072
FZPS40 PHFO 201038
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1130 UTC SAT JAN 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

SOUTH PACIFIC EQUATOR TO 25S BETWEEN 120W AND 160E

SYNOPSIS VALID 0600 UTC JAN 20 2018.
24 HOUR FORECAST VALID 0600 UTC JAN 21 2018.
48 HOUR FORECAST VALID 0600 UTC JAN 22 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT FROM 25S168E TO 21S165E...CONTINUING AS A TROUGH TO 17S160E.
FRONT AND TROUGH NEARLY STATIONARY. SCATTERED MODERATE TO LOCALLY
STRONG TSTMS WITHIN 600 NM N AND NE OF FRONT...AND FROM 05S TO 10S
W OF 171E.
.24 HOUR FORECAST FRONT WEAKENED TO TROUGH FROM 25S167E TO 22S164E
TO 19S160E.
.48 HOUR FORECAST TROUGH FROM 25S164E TO 23S160E.

.FRONT FROM 25S134W TO 23S136W TO 21S141W NEARLY STATIONARY.
ISOLATED MODERATE TSTMS WITHIN 120 NM NE OF FRONT.
.24 HOUR FORECAST FRONT FROM 25S137W TO 21S144W.
.48 HOUR FORECAST WEAKENING FRONT FROM 25S140W TO 22S148W.

.TROUGH FROM 07S178W TO 15S168W TO 18S159W MOVING WSW 10 KT.
SCATTERED MODERATE TO STRONG TSTMS WITHIN 240 NM OF TROUGH.
ISOLATED MODERATE TSTMS ELSEWHERE FROM 09S TO 23S BETWEEN 147W AND
167W.
.24 HOUR FORECAST TROUGH FROM 07S176E TO 15S173W TO 20S160W.
.48 HOUR FORECAST TROUGH FROM 06S169E TO 15S172W TO 25S162W. NE TO
E WINDS 20 TO 30 KT WITHIN 690 NM E OF TROUGH S OF 20S.

.RIDGE FROM 23S176E TO 16S167E TO 11S160E MOVING WSW SLOWLY.

.RIDGE FROM 22S160E TO 22S164E NEARLY STATIONARY AND WEAKENING.

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

.SEAS 8 TO 9 FT FROM 12S TO 22S E OF 127W...AND S OF 20S BETWEEN
174E AND 169E.
.24 HOUR FORECAST SEAS 8 TO 9 FT S OF 14S E OF 137W...FROM 17S TO
23S BETWEEN 150W AND 158W...AND FROM 17S TO 23S BETWEEN 166W AND
175W.
.48 HOUR FORECAST SEAS 8 TO 11 FT S OF 21S BETWEEN 151W AND 166W.
SEAS 8 TO 9 FT FROM 11S TO 23S E OF 128W.

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

,ISOLATED MODERATE TSTMS FROM 13S TO 19S E OF 128W.

$$

.FORECASTER HOUSTON. HONOLULU HI.



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