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000
FZPS40 PHFO 202118
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2330 UTC SAT APR 20 2024

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 APR 20 2024.
24 HOUR FORECAST VALID 1800 UTC APR 21 2024.
48 HOUR FORECAST VALID 1800 UTC APR 22 2024.

.WARNINGS.

...GALE WARNING...
.TROUGH 21S160E 25S162E MOVING E 15 KT. E TO SE WINDS 20 TO 30 KT
S OF LINE 21S160E 22S167E 25S167E. ISOLATED MODERATE TSTMS WITHIN
180 NM N OF TROUGH.
.06 HOUR FORECAST NEW LOW NEAR 22S160E 1007 MB. TROUGH FROM LOW TO
25S165E. E TO SE WINDS 25 TO 35 KT FROM 22S TO 24S W OF 162E.
E TO SE WINDS 20 TO 25 KT ELSEWHERE S OF LINE 21S160E 22S167E
25S167E.
.24 HOUR FORECAST NEW LOW NEAR 20S163E 1006 MB. NEW SECOND LOW
NEAR 23S174E. TROUGH 18S160E TO LOW TO NEW SECOND LOW TO 25S178E.
WINDS 20 TO 30 KT S OF 20S W OF 177E.
.48 HOUR FORECAST LOW NEAR 17S162E 1007 MB. SECOND LOW NEAR
25S178W 1007 MB. THIRD LOW NEAR 21S170W 1008 MB. TROUGH FROM
16S160E TO LOW TO THIRD LOW TO SECOND LOW. WINDS 20 TO 30 KT S OF
20S W OF 176W.

...GALE WARNING...
.TROUGH 19S120W 14S124W MOVING NEARLY STATIONARY. E TO SE WINDS
20 TO 25 KT IN AREA BOUNDED BY 25S135W 18S140W 19S130W 22S120W
25S120W 25S135W.
.24 HOUR FORECAST TROUGH 21S120W 14S124W. SE WINDS 30 TO 35 KT S
OF 22S E OF 122W. WINDS 20 TO 30 KT ELSEWHERE S OF LINE 25S147W
20S144W 16S130W 21S120W.
.48 HOUR FORECAST TROUGH 22S120W 20S125W 13S127W. WINDS 20 TO 30
KT S OF LINE 25S144W 16S140W 20S124W 22S120W.

.SYNOPSIS AND FORECAST.

.TROUGH 21S169E 17S165E 16S163E 17S161E 18S160E MOVING SW SLOWLY.
SCATTERED MODERATE TSTMS BETWEEN TROUGH AND LINE 10S160E 15S176E
22S178E 22S171E 21S169E.
.24 HOUR FORECAST TROUGH MERGED WITH TROUGH MENTIONED IN FIRST
GALE WARNING ABOVE.

.TROUGH 11S179W 08S177E 09S171E 02S167E MOVING S SLOWLY.
SCATTERED MODERATE TSTMS N OF LINE 00S164E 10S168E 15S173E
15S174W 02S179W 00S174E.
.24 HOUR FORECAST TROUGH 14S179W 11S173E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 25S150W 23S155W 20S157W NEARLY STATIONARY. SCATTERED
MODERATE TO LOCALLY STRONG TSTMS WITHIN 120 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 25S149W 16S154W.
.48 HOUR FORECAST TROUGH 25S149W 16S154W.

.TROUGH 16S146W 15S148W 15S151W 14S153W MOVING SW SLOWLY.
SCATTERED MODERATE TO LOCALLY STRONG TSTMS FROM 12S TO 17S BETWEEN
153W AND 140W.
.24 HOUR FORECAST TROUGH 17S150W 10S160W.
.48 HOUR FORECAST TROUGH MERGED WITH TROUGH MENTIONED DIRECTLY
ABOVE.

.SEAS 12 TO 13 FT S OF 23S E OF 121W. SEAS 8 TO 12 FT ELSEWHERE S
OF LINE 25S170W 21S165W 21S145W 15S135W 15S120W.
.24 HOUR FORECAST SEAS 12 TO 16 FT S OF 21S E OF 135W. SEAS 12 TO
13 FT S OF 23S W OF 162E. SEAS 8 TO 12 FT ELSEWHERE S OF LINE
25S165W 22S160W 14S135W 18S120W...AND S OF LINE 21S160E 25S170E.
SEAS 8 TO 11 FT FROM 21S TO 24S BETWEEN 171E AND 175E.
.48 HOUR FORECAST SEAS 12 TO 16 FT S OF LINE 25S135W 18S128W
22S120W. SEAS 12 TO 15 FT S OF 23S W OF 165E. SEAS 8 TO 12 FT
ELSEWHERE S OF LINE 20S160E 22S165E 22S180W 25S180W...AND S OF
LINE 25S153W 10S135W 18S120W.

.WINDS 20 KT OR LESS AND SEAS 8 FT OR LOWER OVER REMAINDER OF AREA.

.ISOLATED MODERATE TSTMS S OF 23S E OF 124W...AND ELSEWHERE S OF
10S W OF 150W.

$$

.FORECASTER JELSEMA. HONOLULU HI.