High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 210320
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0530 UTC TUE NOV 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

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

SYNOPSIS VALID 0000 UTC NOV 21 2017.
24 HOUR FORECAST VALID 0000 UTC NOV 22 2017.
48 HOUR FORECAST VALID 0000 UTC NOV 23 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 11S161E 1005 MB MOVING S SLOWLY. STATIONARY FRONT FROM
23S173W TO 20S180W TO 17S173E TO LOW. ISOLATED MODERATE TO STRONG
TSTMS WITHIN 240 NM OF FRONT W OF 173E AND WITHIN 240 NM NE OF
FRONT BETWEEN 173E AND 180W.
.24 HOUR FORECAST LOW DISSIPATED. WEAK STATIONARY FRONT FROM
20S180W TO 18S175E TO 16S165E TO 16S160E. E TO SE WINDS 20 TO 25
KT BETWEEN FRONT AND 22S W OF 175E.
.48 HOUR FORECAST FRONT WEAKENED TO A TROUGH FROM 19S180W TO
17S170E TO 21S160E. E WINDS 20 TO 25 KT S OF FRONT.

.LOW 24S128W 1011 MB MOVING S SLOWLY. FRONT FROM LOW TO 21S127W TO
16S135W MOVING E SLOWLY S OF 21S AND NEARLY STATIONARY ELSEWHERE.
WINDS 20 TO 25 KT WITHIN 180 NM OF LOW. ISOLATED MODERATE TSTMS
WITHIN 90 NM OF LOW.
.24 HOUR FORECAST LOW MOVED S OF FORECAST AREA. WEAK FRONT FROM
25S127W TO 21S128W TO 20S138W. WINDS DECREASED TO 20 KT OR LESS.
.48 HOUR FORECAST FRONT WEAKENED TO A TROUGH FROM 25S127W TO
22S133W.

.COLD FRONT FROM 25S169W TO 23S173W MOVING E SLOWLY. ISOLATED
MODERATE TSTMS WITHIN 180 NM E OF FRONT.
.24 HOUR FORECAST FRONT FROM 25S164W TO 21S171W.
.48 HOUR FORECAST FRONT FROM 25S158W TO 19S170W.

.TROUGH FROM 14S162W TO 12S154W TO 12S144W MOVING WSW SLOWLY.
SCATTERED MODERATE TSTMS WITHIN 120 NM OF TROUGH E OF 154W.
ISOLATED MODERATE TSTMS WITHIN 180 NM OF TROUGH W OF 154W.
.24 HOUR FORECAST TROUGH FROM 14S164W TO 13S145W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 02S175E TO 08S175E TO 13S176E MOVING SSW 10 KT.
SCATTERED STRONG TSTMS WITHIN 270 NM E OF TROUGH S OF 08S.
ISOLATED MODERATE TSTMS ELSEWHERE FROM 05S TO 13S BETWEEN 176W
AND 174E.
.24 HOUR FORECAST TROUGH FROM 03S172E TO 13S174E.
.48 HOUR FORECAST TROUGH FROM 04S170E TO 12S172E.

.RIDGE FROM 25S121W TO 21S124W TO 18S127W NEARLY STATIONARY.

.RIDGE FROM 25S161W TO 22S171W MOVING NE SLOWLY.

.RIDGE FROM 25S178E TO 24S176W MOVING ENE SLOWLY.

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

.SEAS 8 TO 10 FT S OF 22S W OF 143W.
.24 HOUR FORECAST SEAS DECREASED TO 8 FT OR LESS.
.48 HOUR FORECAST SEAS 8 TO 9 FT S OF 19S BETWEEN 177E AND 165E.

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

$$

.FORECASTER WROE. HONOLULU HI.


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