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 191543
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC SAT AUG 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC AUG 19 2017.
24 HOUR FORECAST VALID 1200 UTC AUG 20 2017.
48 HOUR FORECAST VALID 1200 UTC AUG 21 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 06S166E 1009 MB MOVING SE 10 KT. ISOLATED MODERATE TO
STRONG TSTMS N OF 12S W OF 171E.
.24 HOUR FORECAST LOW NEAR 10S173E 1008 MB. TROUGH FROM LOW TO
16S178E.
.48 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 10S169E TO 18S176E.

.COLD FRONT FROM 25S175E TO 23S168E TO 21S160E. FRONT MOVING
E 10 KT S OF 23S...AND DISSIPATING N OF 23S. WIND NW 20 TO 25 KT
S OF 23S WITHIN 300  NM E OF FRONT. ALSO WIND W 20 TO 30 KT
OVER FORECAST WATERS SW OF FRONT. ASSOCIATED SEAS INCLUDED BELOW.
.24 HOUR FORECAST FRONT FROM 25S177E TO 21S171E. WIND NW 20 TO
25 KT S OF 23S WITHIN 150 NM E OF FRONT. ALSO WINDS W TO SW
20 TO KT OVER FORECAST WATERS SW AND W OF FRONT.
.48 HOUR FORECAST FRONT FROM 25S173W TO 20S178W. ASSOCIATED
WINDS DIMINISHED TO 20 KT OR LESS.

.STATIONARY FRONT FRONT 17S120W TO 13S128W TO 10S134W TO 08S144W.
.36 HOUR FORECAST FRONT DISSIPATED. TROUGH FROM 08S143W TO 13S136W
TO 16S125W.

.TROUGH FROM 17S175W TO 20S172W TO 23S168W MOVING SW 10 KT.
.24 HOUR FORECAST TROUGH MERGED WITH COLD FRONT DESCRIBED
ABOVE.

.RIDGE FROM 25S171W TO 20S177E.
.24 HOUR FORECAST RIDGE FROM 25S164W TO 19S174W.
.48 HOUR FORECAST RIDGE FROM 25S159W TO 22S169W.

.WINDS E TO SE 20 TO 25 KT WITHIN 360 NM EITHER SIDE OF A LINE
FROM 09S163W TO 21S145W.
.24 HOUR FORECAST WINDS E TO SE 20 TO 25 KT WITHIN 480 NM EITHER
SIDE OF A LINE FROM 08S167W TO 20S140W.
.48 HOUR FORECAST WINDS E TO SE 20 TO 25 KT WITHIN 360 NM EITHER
SIDE OF A LINE FROM 14S160W TO 21S143W.

.SEAS 8 TO 15 FT FROM S OF 18S E OF 138W...AND ALSO S OF 22S W OF
177E. SEAS 8 TO 10 FT WITHIN A POLYGON BOUND BY 08S168W 08S149W
15S152W 15S140W 25S142W 16S170W 08S168W.
.24 HOUR FORECAST SEAS 8 TO 15 FT S OF A LINE FROM 15S160E 15S163E
21S166E 18S173E 25S173W. SEAS 8 TO 10 FT SE OF A LINE FROM 16S120W
TO 25S140W...AND ALSO WITHIN A POLYGON BOUND BY 05S160W 12S157W
21S166W 13S172W 05S160W.
.48 HOUR FORECAST SEAS 8 TO 15 FT S OF A LINE FROM 11S160E 11S164E
21S165E 17S172E 18S177W 25S168W. SEAS 8 TO 11 FT S OF 20S E OF
135W. SEAS 8 TO 9 FT FROM 10S TO 21S BETWEEN 165W AND 145W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ITCZ FROM 06S171W TO 08S178W TO 05S175E TO 06S171E. SCATTERED
MODERATE TO STRONG TSTMS WITHIN 300 NM EITHER SIDE OF AXIS
OF CONVERGENCE.

$$

.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.