High Seas Forecast
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
000
FZPS40 PHFO 202320
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2330 UTC FRI OCT 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC OCT 20 2017.
24 HOUR FORECAST VALID 1800 UTC OCT 21 2017.
48 HOUR FORECAST VALID 1800 UTC OCT 22 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 13S177E 1009 MB MOVING SE 10 KT. STATIONARY FRONT FROM
LOW TO 17S172W TO 21S164W TO 25S159W. ASSOCIATED TSTMS INCLUDED
BELOW.
.24 HOUR FORECAST DISSIPATING LOW NEAR 16S177W 1011 MB. FRONT FROM
LOW TO 21S164W TO 25S159W.
.48 HOUR FORECAST COLD FRONT FROM 25S159W TO 21S164W THENCE A
STATIONARY FRONT TO 17S172W.

.COLD FRONT APPROACHING FORECAST AREA FROM SW.
.24 HOUR FORECAST FRONT JUST SW OF FORECAST AREA NEAR 27S157E. WINDS
INCREASING TO N TO NW 20 TO 25 KT S OF 23S W OF 175E.
.48 HOUR FORECAST FRONT FROM 25S164E TO 21S160E. WINDS NE TO NW 20
TO 25 KT S OF 23S BETWEEN 164E AND 177E.

.STATIONARY FRONT 10S150W TO 12S133W TO 16S120W. WINDS SE TO E 20 TO
25 KT FROM FROM FRONT TO LATITUDE 20S W OF 130W.
.24 HOUR FORECAST TROUGH FROM 06S154W TO 11S145W THENCE A DISSIPATING
STATIONARY FRONT TO 12S133W TO 16S120W. ASSOCIATED WINDS DIMINISHED
TO 20 KT OR LESS.
.48 HOUR FORECAST TROUGHS FROM 09S154W TO 12S149W TO 13S141W..AND
ALSO FROM 14S127W TO 22S121W.

.TROUGH FROM LOW DESCRIBED ABOVE NEAR 13S177E TO 09S168E TO
09S160E NEARLY STATIONARY. ASSOCIATED TSTMS INCLUDED BELOW.
.24 HOUR FORECAST TROUGH FROM 09S160E TO 09S168E TO 13S177E.
.48 HOUR FORECAST TROUGH FROM 14S160E TO 15S170E TO 18S177E.

.RIDGE FROM 25S147W TO 19S157W TO 13S169W TO 06S178E.
.24 HOUR FORECAST RIDGE FROM 25S143W TO 19S157W.
.48 HOUR FORECAST RIDGE FROM 25S139W TO 21S148W.

.RIDGE FROM 25S171E TO 23S179E TO 22S172W.
.24 HOUR FORECAST RIDGE FROM 25S175E TO 25S169W.
.48 HOUR FORCAST RIDGE FLATTENED OVER FORECAST AREA.

.RIDGE BUILDING OVER FORECAST AREA.
.24 HOUR FORECAST RIDGE FROM 25S176E TO 19S164E.
.48 HOUR FORECAST RIDGE FROM 25S178W TO 21S172E.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 TO 11 FT S OF A LINE FROM 10S120W TO 10S150W TO 20S179W.
.24 HOUR FORECAST SEAS 8 TO 10 FT FROM 05S TO 20S E OF 140W.
.48 HOUR FORECAST SEAS SUBSIDED TO 8 FT OR LOWER.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.SCATTERED STRONG TSTMS FROM 09S TO 14S BETWEEN 177E AND 177W.
ISOLATED MODERATE TO STRONG TSTMS ELSEWHERE WITHIN A POLYGON BOUND BY
06S161E 08S176E 14S169W 25S159W 25S170W 14S157E 12S161E 06S161E. ALSO
ISOLATED MODERATE TSTMS FROM 02S TO 08S BETWEEN 177W AND 171W.

$$

.FORECASTER BEDAL. HONOLULU HI.



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.