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 30
000
FZPS40 PHFO 211027
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1130 UTC TUE FEB 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC FEB 21 2017.
24 HOUR FORECAST VALID 0600 UTC FEB 22 2017.
48 HOUR FORECAST VALID 0600 UTC FEB 23 2017.

.WARNINGS...

...TROPICAL STORM WARNING...
.TROPICAL CYCLONE 07P/15F 20.6S 165.2W 998 MB MOVING SE 13 KT.
TROUGH FROM 25S159W TO TC TO 19S170W MOVING S 10 KT. MAXIMUM
SUSTAINED WINDS 45 KT GUSTS 55 KT. WINDS 34 KT OR GREATER AND SEAS
12 FT OR HIGHER WITHIN 160 NM NE QUADRANT...60 NM S SEMICIRCLE...
AND 190 NM NW QUADRANT. WINDS 20 TO 33 KT ELSEWHERE WITHIN 300 NM
NE SEMICIRCLE...AND ELSEWHERE WITHIN 90 NM SW SEMICIRCLE OF TC.
WINDS 20 TO 30 KT ELSEWHERE WITHIN 210 NM E OF TROUGH S OF 22S.
NUMEROUS MODERATE TO STRONG TSTMS WITHIN 180 NM SE QUADRANT OF TC.
SCATTERED MODERATE TO LOCALLY STRONG TSTMS ELSEWHERE WITHIN 270 NM
OF TC AND TROUGH.
.24 HOUR FORECAST TROPICAL CYCLONE 07P/15F 25.0S 158.5W. TROUGH
FROM TC TO 20S157W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.
WINDS 34 KT OR GREATER AND SEAS 12 FT OR HIGHER WITHIN 155 NM NE
QUADRANT...75 NM SEMICIRCLE...AND 140 NM NW QUADRANT. WINDS 20 TO
33 KT ELSEWHERE WITHIN 210 NM E SEMICIRCLE...AND ELSEWHERE 90 NM
W SEMICIRCLE OF TC. WINDS 20 TO 30 KT ELSEWHERE WITHIN 180 NM E
OF TROUGH.
.48 HOUR FORECAST POST-TROPICAL CYCLONE 07P/15F MOVED FAR S OF
AREA. TROUGH FROM 25S147W TO 22S150W. NW WINDS 20 TO 25 KT WITHIN
180 NM E OF TROUGH S OF 24S.

...STORM WARNING...
.LOW...POSSIBLE DEVELOPING TC...18S180E 1001 MB MOVING SE 25 KT.
TROUGH FROM 19S170W TO LOW TO 15S170E MOVING S SLOWLY. WINDS 30 TO
35 KT WITHIN 240 NM N AND NE QUADRANTS OF LOW. WINDS 20 TO 30 KT
ELSEWHERE WITHIN 390 NM N AND NE OF LOW AND TROUGH W OF 174W...AND
WITHIN 210 NM SW SEMICIRCLE OF LOW. SCATTERED MODERATE TO STRONG
TSTMS WITHIN 300 NM OF LOW AND TROUGH.
.24 HOUR FORECAST LOW...POSSIBLE TC...23S169W 999 MB. TROUGH FROM
25S168W T0 LOW TO 19S171W TO 15S170E. WINDS 35 TO 50 KT WITHIN 240
NM N AND NE QUADRANTS OF LOW. WINDS 25 TO 40 KT ELSEWHERE S OF 18S
BETWEEN 166W AND 171W...AND WITHIN 180 NM N OF TROUGH BETWEEN 171W
AND 176W. WINDS 20 TO 30 KT ELSEWHERE WITHIN 300 NM N AND NE OF
LOW AND TROUGH E OF 174E.
.48 HOUR FORECAST LOW...POSSIBLE TC...MOVED S OF AREA. TROUGH FROM
25S158W TO 17S175W TO 16S180E TO 16S170E. WINDS 20 TO 30 KT S OF
21S BETWEEN 154W AND 164W. WINDS 20 TO 25 KT WITHIN 180 NM N OF
TROUGH N OF 21N.

.SYNOPSIS AND FORECAST.

.LOW 15S160E 1007 MB MOVING NW SLOWLY. TROUGH FROM LOW TO 15S170E
MOVING N SLOWLY. ISOLATED MODERATE TSTMS WITHIN 150 NM OF LOW AND
TROUGH.
.24 HOUR FORECAST LOW MOVED W OF AREA. TROUGH FROM 14S160E TO
15S170E.
.24 HOUR FORECAST TROUGH FROM 16S160E TO 16S170E.

.TROUGH FROM 06S158W TO 15S148W MOVING WSW SLOWLY. SCATTERED
MODERATE TSTMS WITHIN 150 NM OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 11S158W TO 16S151W.
.48 HOUR FORECAST WEAKENING TROUGH FROM 13S156W TO 17S152W.

.TROUGH FROM 25S142W TO 17S152W MOVING S 10 KT. ISOLATED MODERATE
TSTMS WITHIN 150 NM OF TROUGH.
.24 HOUR FORECAST WEAKENING TROUGH FROM 23S146W TO 22S149W.
.48 HOUR FORECAST TROUGH MOVED S OF AREA.

.RIDGE FROM 23S120W TO 16S147W NEARLY STATIONARY.

.RIDGE FROM 12S157W TO 07S170W TO 02S160E NEARLY STATIONARY.

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

.SEAS 12 TO 14 FT WITHIN 90 NM OF A LINE FROM 14S178E TO 17S176W.
SEAS 8 TO 12 FT ELSEWHERE S OF 15S BETWEEN 157W AND 170W...AND
ELSEWHERE WITHIN 210 NM OF A LINE FROM 11S172E TO 18S173W.
.24 HOUR FORECAST SEAS 12 TO 24 FT WITHIN 150 NM OF A LINE FROM
15S176W TO 19S171W TO 24S169W. SEAS 8 TO 12 FT ELSEWHERE S OF A
LINE FROM 25S152W TO 17S157W TO 17S166W TO 13S173W TO 11S174E.
.48 HOUR FORECAST SEAS 12 TO 15 FT S OF A LINE FROM 25S156W TO
19S162W TO 19S166W. SEAS 8 TO 12 FT ELSEWHERE S OF A LINE FROM
25S154W TO 15S163W TO 15S172W. SEAS 8 TO 11 FT S OF 22S BETWEEN
145W AND 152W...AND WITHIN 120 NM OF A LINE FROM 17S172W TO
14S179W.

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

.ISOLATED MODERATE TSTMS N OF 11S W OF 170E...AND WITHIN 150 NM OF
A LINE FROM 11S162W TO 18S154W.

$$

.FORECASTER HOUSTON. HONOLULU HI.



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