000
FZPN40 PHFO 180340
HSFNP 

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC WED MAY 18 2022

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC MAY 18 2022.
24 HOUR FORECAST VALID 0000 UTC MAY 19 2022.
48 HOUR FORECAST VALID 0000 UTC MAY 20 2022.

.WARNINGS. 

...GALE WARNING...
.FRONT FROM 30N162W TO 23N168W TO 23N170W TO 19N177W NEARLY 
STATIONARY. S TO SW WINDS 20 TO 35 KT WITHIN 210 NM E OF FRONT N 
OF 25N. ELSEWHERE WINDS 20 TO 30 KT N OF LINE FROM 30N154W TO 
22N163W TO 23N167W TO 30N171W. SCATTERED MODERATE TSTMS WITHIN 
150 NM E OF FRONT N OF 25N.
.24 HOUR FORECAST FRONT FROM 30N161W TO 21N170W TO 18N178W. 
MAINLY S TO SW WINDS 20 TO 35 KT WITHIN 310 NM E OF FRONT N OF 
26N. ELSEWHERE S TO SW WINDS 20 TO 30 KT BETWEEN FRONT AND A LINE
FROM 30N146W TO 21N158W.
.48 HOUR FORECAST FRONT FROM 30N156W TO 24N160W THENCE TROUGH TO 
17N170W. S TO SW WINDS 30 TO 35 KT N OF 28N BETWEEN 151W AND 154W.
ELSEWHERE S TO SW WINDS 20 TO 30 KT BETWEEN FRONT AND LINE FROM 
30N147W TO 22N159W.

.SYNOPSIS AND FORECAST. 

.FRONT FROM 30N166W TO 25N170W TO 26N176W MOVING E SLOWLY. WINDS 
DESCRIBED IN THE GALE WARNING ABOVE. 
.24 HOUR FORECAST FRONT FROM 30N163W TO 25N170W. WINDS DESCRIBED 
IN THE GALE WARNING ABOVE.
.48 HOUR FORECAST FRONT MERGED WITH FRONT DESCRIBED IN GALE 
SECTION. WINDS DESCRIBED IN THE GALE WARNING ABOVE.

.FRONT FROM 30N174E TO 28N170E TO 28N165E MOVING SE 10 KT. 
.24 HOUR FORECAST NEW LOW 27N178E 1011 MB. FRONT WEAKENED TO 
TROUGH FROM LOW TO 24N169E.
.48 HOUR FORECAST LOW 25N177W 1011 MB. TROUGH FROM LOW TO 
20N173E.

.TROUGH FROM 17N173W TO 06N174E MOVING W SLOWLY S OF 12N AND 
NEARLY STATIONARY ELSEWHERE. ISOLATED MODERATE TSTMS FROM 05N TO 
09N BETWEEN 179W AND 173E.
.24 HOUR FORECAST TROUGH FROM 18N172W TO 07N176E. 
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 10N167E TO 04N161E MOVING W 10 KT. ISOLATED MODERATE
TSTMS WITHIN 210 NM SE OF TROUGH. 
.24 HOUR FORECAST WEAK TROUGH FROM 10N161E TO 07N160E. 
.48 HOUR FORECAST TROUGH MOVED W OF FORECAST AREA.

.RIDGE FROM 28N160E TO 25N167E TO 24N180W MOVING S SLOWLY AND
ERODING FROM THE E.

.RIDGE FROM 30N143W TO 10N173W NEARLY STATIONARY.

.48 HOUR FORECAST HIGH 28N165E 1017 MB. 

.WINDS 20 KT OR LESS REST OF FORECAST AREA.

.SEAS 8 TO 11 FT N OF 26N BETWEEN 157W AND 177W. 
.24 HOUR FORECAST SEAS 8 TO 12 FT N OF LINE FROM 30N152W TO 
24N157W TO 24N167W. 
.48 HOUR FORECAST SEAS 8 TO 13 FT N OF LINE FROM 30N149W TO 
24N155W TO 24N162W.

.SEAS 8 FT OR LESS REST OF FORECAST AREA.

.ITCZ FROM 07N140W TO 07N154W TO 06N164W. ISOLATED MODERATE 
WITHIN 150 NM OF ITCZ BETWEEN 145W AND 163W. 



$$

.FORECASTER ALMANZA. HONOLULU HI.