000
FZPN40 PHFO 231530
HSFNP 

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC SAT OCT 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 1200 UTC OCT 23 2021.
24 HOUR FORECAST VALID 1200 UTC OCT 24 2021.
48 HOUR FORECAST VALID 1200 UTC OCT 25 2021.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST. 

.TROUGH FROM 16N167W TO 12N168W TO 09N170W MOVING W 10 KT. 
WINDS 20 TO 25 KT FROM 12N TO 17N BETWEEN 166W AND 169W. 
SCATTERED MODERATE TSTMS WITHIN 390 NM E OF TROUGH N OF 09N...
AND FROM 21N TO 26N BETWEEN TROUGH AND 165E. 
.24 HOUR FORECAST TROUGH FROM 17N172W TO 10N175W. E WINDS 20 TO 
25 KT FROM 13N TO 20N BETWEEN 168W AND 178W. 
.48 HOUR FORECAST TROUGH DISSIPATED. ASSOCIATED WINDS DIMINISHED 
TO 20 KT OR LESS.

.TROUGH FROM 28N163E TO 19N161E MOVING W SLOWLY. SCATTERED 
MODERATE TSTMS WITHIN 75 NM OF A LINE FROM 25N169E TO 22N171E 
TO 18N173E. 
.24 HOUR FORECAST TROUGH FROM 20N160E TO 24N161E TO 28N163E. 
.48 HOUR FORECAST TROUGH MOVED W OF AREA.

.12 HOUR FORECAST NEW FRONT NEAR 30N160E. 
.24 HOUR FORECAST FRONT FROM 30N161E TO 29N160E. NE WINDS 20 TO 
25 KT N OF FRONT.
.48 HOUR FORECAST WEAKENING FRONT FROM 30N165E TO 27N160E.
NE WINDS 20 TO 25 KT N OF FRONT.

.E WINDS 20 TO 25 KT FROM 13N TO 18N BETWEEN 144W AND 153W. 
.24 HOUR FORECAST E WINDS 20 TO 25 KT FROM 12N TO 19N BETWEEN 
151W AND 161W. 
.48 HOUR FORECAST E WINDS 20 TO 25 KT FROM 10N TO 18N BETWEEN 
155W AND 168W. 

.RIDGE FROM 30N164E TO 28N160E MOVING NE 10 KT.

.SEAS 8 TO 11 FT N OF 17N E OF 152W. SEAS 8 TO 9 FT FROM 20N TO 
28N BETWEEN 152W AND 164W. 
.24 HOUR FORECAST SEAS 8 TO 10 FT FROM 10N TO 18N E OF 159W. 
SEAS 8 TO 10 FT N OF 28N E OF 147W. 
.48 HOUR FORECAST SEAS 12 TO 17 FT N OF 26N E OF 15OW. SEAS 8 TO 
12 FT ELSEWHERE N OF 23N E OF 157W. SEAS 8 TO 10 FT NW OF A LINE 
FROM 30N166E TO 27N160E. SEAS 8 TO 9 FT FROM 10N TO 17N BETWEEN 
158W AND 166W. 

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

.ITCZ FROM 07N140W TO 07N150W TO 05N158W...AND FROM 07N176W TO 
08N174E TO 08N166E TO 09N160E. SCATTERED MODERATE TO STRONG TSTMS 
FROM 03N TO 11N BETWEEN 179W AND 162E. 

.ISOLATED MODERATE TSTMS FROM 11N TO 13N BETWEEN 161E AND 164E. 

$$

.FORECASTER BIRCHARD. HONOLULU HI.