High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 211534
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC SUN JAN 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC JAN 21 2018.
24 HOUR FORECAST VALID 1200 UTC JAN 22 2018.
48 HOUR FORECAST VALID 1200 UTC JAN 23 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH FROM 25S159W TO 14S170W TO 11S180W TO 07S170E MOVING SW
SLOWLY. WINDS 20 TO 25 KT SEAS 8 TO 9 FT BETWEEN TROUGH AND 150W
S OF 17S...AND ALSO BETWEEN TROUGH AND 180W S OF 16S. NUMEROUS
MODERATE ISOLATED STRONG TSTMS WITHIN 100 NM EITHER SIDE OF A LINE
FROM 13S158W TO 17S156W TO 22S158W. SCATTERED MODERATE...ISOLATED
STRONG TSTMS WITHIN 400 NM ELSEWHERE N AND E OF TROUGH E OF 180W.
.24 HOUR FORECAST TROUGH FROM 25S164W TO 20S168W TO 12S180W TO
08S165E. WINDS 20 TO 30 KT SEAS 8 TO 10 FT S OF 22S BETWEEN TROUGH
AND 150W...AND ALSO S OF 15S BETWEEN 170W AND 174E.
.48 HOUR FORECAST TROUGH FROM 25S168W TO 17S175W TO 12S175E TO
10S160E. WINDS 20 TO 25 KT SEAS 8 TO 9 FT BETWEEN TROUGH AND 155W
S OF 23S. ELSEWHERE...WINDS DIMINISHED TO 20 KT OR LESS...SEAS
LOWERED TO 8 FT OR LESS.

.TROUGH 04S160E TO 05S173E TO 08S178E MOVING WSW SLOWLY. SCATTERED
MODERATE TSTMS WITHIN 120 NM OF TROUGH.
.24 HOUR FORECAST TROUGH MERGED WITH TROUGH DESCRIBED ABOVE.

.TROUGH FROM 15S133W TO 20S131W MOVING W 10 KT. ISOLATED TSTMS
WITHIN 160 NM OF TROUGH.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 19S160E TO 23S162E TO 25S164E MOVING S SLOWLY.
.24 HOUR FORECAST FRONT DISSIPATED.

.RIDGE FROM 25S175E TO 13S160E NEARLY STATIONARY.

.RIDGE FROM 20S151W TO 10S161W TO 00S171W NEARLY STATIONARY.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 TO 9 FT S OF 14S E OF 133W.
.24 HOUR FORECAST SEAS 8 TO 9 FT S OF 13S E OF 130W.
.48 HOUR FORECAST SEAS 8 TO 9 FT S OF 15S E OF 130W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.SCATTERED MODERATE TO STRONG TSTMS N 18S W OF 162E.

$$

.FORECASTER LAU. HONOLULU HI.


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