The High Seas Forecast for the South Pacific

High Seas Forecast   Issued: 12/05/2025 01:40:48 PM UTC

                        
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FZPS40 PHFO 050340
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0530 UTC FRI DEC 05 2025

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 DEC 05 2025.
24 HOUR FORECAST VALID 0000 UTC DEC 06 2025.
48 HOUR FORECAST VALID 0000 UTC DEC 07 2025.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL CYCLONE 06P NEAR 13.9S 149.7W 1002 MB MOVING SE AT 20 KT.
MAXIMUM SUSTAINED WINDS 35 KT GUST 45 KT. TROUGH 19S147W TO TROPICAL
CYCLONE 06P TO 11S153W 08S162W 08S167W 12S173W 19S178W MOVING S
10 KT W OF TROPICAL CYCLONE 06P...AND NEARLY STATIONARY ELSEWHERE.
WINDS 34 KT OR GREATER AND SEAS 4 M OR HIGHER WITHIN 40 NM NE...AND
25 NM NW QUADRANTS. WINDS 20 TO 33 KT AND SEAS 2.5 TO 4 M ELSEWHERE
FROM 16S TO 11S BETWEEN 147W AND 152W. NUMEROUS MODERATE TO STRONG
TSTMS WITHIN 210 NM OF TROPICAL CYCLONE 06P AND TROUGH.
.24 HOUR FORECAST TROPICAL CYCLONE 06P NEAR 19.2S 144.6W. MAXIMUM
SUSTAINED WINDS 40 KT GUST 50 KT. TROUGH 22S143W TO TROPICAL CYCLONE
06P TO 18S169W 15S178W. WINDS 34 KT OR GREATER AND SEAS 4 M OR
HIGHER WITHIN 50 NM NE...10 NM SE...AND 10 NM NW QUADRANTS. WINDS
20 TO 33 KT AND SEAS 2.5 TO 4 M ELSEWHERE FROM 20S TO 18S BETWEEN
142W AND 147W.
.48 HOUR FORECAST POST-TROP/REMNANT LOW 06P MOVED S OF AREA. TROUGH
25S140W 14S155W 12S169W. WINDS DIMINISHED TO 20 KT OR LESS AND SEAS
LOWERED TO 2.5 M OR LOWER.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE USED
WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE AND
INTENSITY.

.SEE THE LATEST BULLETIN ISSUED UNDER WMO HEADER WTPS31 PGTW FOR
ADDITIONAL INFORMATION ON TROPICAL CYCLONE 06P.

...GALE WARNING...
.TROUGH 25S143W 21S143W TO 19S147W NEARLY STATIONARY. WINDS 30 TO
40 KT S OF 22S BETWEEN 139W AND 147W. WINDS 20 TO 30 KT ELSEWHERE
S OF 19S BETWEEN 135W AND 150W.
.24 HOUR FORECAST TROUGH 25S143W 22S143W. WINDS DIMINISHED TO 20 KT
OR LESS.

.SYNOPSIS AND FORECAST.

.TROUGH 25S175W 19S174E 17S160E MOVING NE SLOWLY. ISOLATED MODERATE
TSTMS WITHIN 180 NM N OF TROUGH W OF 169E.
.24 HOUR FORECAST TROUGH 25S170W 18S176E 15S160E.
.48 HOUR FORECAST TROUGH 25S171W 18S178E 15S160E.

.TROUGH 08S160E 11S169E 12S177E NEARLY STATIONARY. SCATTERED
MODERATE TSTMS WITHIN 240 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 08S160E 08S178E.
.48 HOUR FORECAST TROUGH 08S160E 08S178E.

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

.SEAS 4 TO 5 M S OF 20S BETWEEN 139W AND 145W. SEAS 2.5 TO 4 M
ELSEWHERE S OF 19S BETWEEN 137W AND 155W. SEAS 2.5 TO 3 M S OF
LINE 25S180E 20S172E 25S169E.
.24 HOUR FORECAST SEAS 2.5 TO 4 M S OF 22S BETWEEN 135W AND 155W.
SEAS 2.5 TO 3 M S OF LINE 25S170W 18S169E.
.48 HOUR FORECAST SEAS 2.5 TO 3 M S OF 20S BETWEEN 155W AND 169E.

.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.

$$

.FORECASTER AHUE. HONOLULU HI.