High Seas Forecast
Issued by NWS

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FZPS40 PHFO 182315
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2330 UTC SUN FEB 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC FEB 18 2018.
24 HOUR FORECAST VALID 1800 UTC FEB 19 2018.
48 HOUR FORECAST VALID 1800 UTC FEB 20 2018.

.WARNINGS.

...GALE WARNING...
.LOW 17S159W 1006 MB MOVING SE 20 KT. TROUGH FROM 18S152W TO LOW TO
15S169W TO 14S179W TO 12S169E TO 15S160W NEARLY STATIONARY. ANOTHER
TROUGH FROM 25S155W TO LOW MOVING SE SLOWLY. WINDS 25 TO 35 KT
WITHIN 90 NM OF TROUGH BETWEEN 154W AND 157W. WINDS 20 TO 30 KT
ELSEWHERE FROM 12S TO 18S BETWEEN 152W AND 158W. SCATTERED MODERATE
TO STRONG TSTMS WITHIN 60 NM OF A LINE FROM 04S166E TO 07S167E...AND
FROM 14N TO 18N BETWEEN 153W AND 156W. ISOLATED MODERATE TO STRONG
TSTMS ELSEWHERE N OF TROUGH W OF 160W...AND S OF 05S BETWEEN 160W
AND 145W.
.24 HOUR FORECAST LOW 24S154W 1004 MB. TROUGH FROM LOW TO 18S156W
TO 15S165W TO 08S163E. WINDS 25 TO 35 KT S OF 20S BETWEEN 150W AND
153W. WINDS 20 TO 30 KT ELSEWHERE S OF 22S BETWEEN 143W AND
149W...AND S OF 13S BETWEEN 143W AND 155W.
.48 HOUR FORECAST LOW MOVED S OF AREA. NEW LOW 15S165W 1006 MB.
TROUGH FROM 25S155W TO 19S157W TO LOW TO 13S170W TO 14S175E. WINDS
20 TO 25 KT S OF 21S BETWEEN 150W AND TROUGH.

.SYNOPSIS AND FORECAST.

.TROUGH FROM 25S161E TO 22S160E NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH LITTLE CHANGE.
.48 HOUR FORECAST TROUGH MOVED SW OF AREA.

.RIDGE FROM 11S145W TO 08S155W TO 05S169W TO 05S178E TO 00S168E
NEARLY STATIONARY.

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

.SEAS 8 TO 12 FT S OF A LINE FROM 20S160E TO 23S167E TO 20S177E.
SEAS 8 TO 10 FT S OF A LINE FROM 25S180W TO 20S177W TO 19S173W TO
19S171W TO 23S166W TO 25S165W...AND FROM 14S TO 17S BETWEEN 154W AND
157W.
.24 HOUR FORECAST SEAS 13 TO 18 FT S OF 20S BETWEEN 150W AND 152W.
SEAS 8 TO 13 FT ELSEWHERE S OF 18S BETWEEN 149W AND 154W. SEAS 8 TO
10 FT FROM 13S TO 18S BETWEEN 151W AND 154W. SEAS 8 TO 9 FT S OF A
LINE FROM 22S175W TO 19S179E TO 19S173E.
.48 HOUR FORECAST SEAS 8 TO 10 FT S OF 20S BETWEEN 150W AND 154W.

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

.ISOLATED MODERATE TSTMS S OF 20S BETWEEN 129W AND 136W...AND FROM
10S TO 20S BETWEEN 128W AND 144W.

$$

.HONOLULU HI.



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