National Weather Service United States Department of Commerce

645
FZPS40 PHFO 181525
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC FRI JUN 18 2021

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 JUN 18 2021.
24 HOUR FORECAST VALID 1200 UTC JUN 19 2021.
48 HOUR FORECAST VALID 1200 UTC JUN 20 2021.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT FROM 25S164E TO 21S160E MOVING E 10 KT.
.24 HOUR FORECAST FRONT FROM 25S172E TO 20S165E TO 18S160E.
.48 HOUR FORECAST FRONT FROM 25S178E TO 20S167E TO 16S160E.

.FRONT FROM 25S167W TO 21S170W MOVING E 20 KT. ISOLATED MODERATE
TSTMS FROM 21S TO 23S BETWEEN 168W AND 173W.
.24 HOUR FORECAST DISSIPATING FRONT FROM 25S161W TO 21S166W.
.48 HOUR FORECAST FRONT DISSIPATED.

.TROUGH FROM 25S162W TO 20S163W TO 10S177W TO 03S173E NEARLY
STATIONARY. SCATTERED TO LOCALLY ISOLATED MODERATE TO STRONG TSTMS S
OF 17S BETWEEN 157W AND 164W. ISOLATED MODERATE TSTMS WITHIN 60 NM
OF LINE FROM 11S164W TO 15S168W TO 16S166W...WITHIN 45 NM OF LINE
FROM 01S172E TO 09S176E...AND WITHIN 60 NM OF POINT 19S167W.
.24 HOUR FORECAST TROUGH ABSORBED BY DEVELOPING FRONT FROM 25S157W
TO 20S161W TO 15S166W. PORTION OF TROUGH N OF 15S DISSIPATED.
.48 HOUR FORECAST FRONT FROM 25S152W TO 18S157W TO 14S161W.

.TROUGH FROM 25S143W TO 21S145W MOVING SSW 10 KT. ISOLATED MODERATE
TSTMS S OF 23S BETWEEN 138W AND 141W.
.24 HOUR FORECAST TROUGH MOVED S OF FORECAST AREA.

.48 HOUR FORECAST NEW TROUGH FROM 08S160E TO 10S170E.

.RIDGE FROM 25S171E TO 22S167E MOVING ENE 10 KT.

.E TO SE WINDS 20 TO 30 KT S OF 06S E OF 140W. E WINDS 20 TO 25 KT
FROM 08S TO 16S BETWEEN 140W AND 152W.
.24 HOUR FORECAST E TO SE WINDS 20 TO 25 KT S OF 06S E OF 138W.
.48 HOUR FORECAST E TO SE WINDS 20 TO 25 KT S OF 06S E OF 136W.

.WINDS 20 KT OR LESS REST OF FORECAST AREA.

.SEAS 12 TO 13 FT FROM 18S TO 22S E OF 132W. SEAS 8 TO 12 FT
ELSEWHERE S OF 05S E OF 148W. SEAS 8 TO 9 FT FROM 06S TO 15S BETWEEN
148W AND 159W.
.24 HOUR FORECAST SEAS 8 TO 12 FT E OF LINE FROM 02S132W TO 14S144W
TO 25S143W. SEAS 8 TO 9 FT FROM 06S TO 09S BETWEEN 153W AND 156W.
.48 HOUR FORECAST SEAS 8 TO 10 FT S OF 06S E OF 140W...AND S OF 22S
BETWEEN 155W AND 165W. SEAS 8 TO 9 FT S OF 22S W OF 166E.

.SEAS 8 FT OR LESS REST OF FORECAST AREA.

.ISOLATED MODERATE TSTMS FROM 05S TO 09S BETWEEN 151W AND 156W...AND
FROM 07S TO 11S W OF 167E.

$$

.FORECASTER KINEL. HONOLULU HI.