FZPN40 PHFO 171032
HSFNP 

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 UTC MON MAY 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC MAY 17 2021.
24 HOUR FORECAST VALID 0600 UTC MAY 18 2021.
48 HOUR FORECAST VALID 0600 UTC MAY 19 2021.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT 30N176E 25N169E 22N160E MOVING E 20 KT N OF 26N AND NEARLY 
STATIONARY ELSEWHERE. 
.24 HOUR FORECAST FRONT 30N177W 26N174E 23N160E. 
.48 HOUR FORECAST FRONT 30N171W 27N179E 24N160E. 

.TROUGH 28N143W 16N145W MOVING MOVING W SLOWLY. 
.24 HOUR FORECAST TROUGH DISSIPATED. 

.WINDS 20 TO 25 KT N OF 04N AND S OF LINE 30N155W 19N175W 14N160E. 
.24 HOUR FORECAST WINDS 20 TO 25 KT FROM 07N TO 18N BETWEEN 145W 
AND 170W.
.48 HOUR FORECAST WINDS 20 TO 25 KT IN AREA 10N140W 04N158W 11N177W 
22N156W 18N140W.

.RIDGE 30N170W 26N180E 26N175E MOVING E 15 KT. 

.RIDGE 30N161E 27N167E BUILDING E 15 KT. 

.SEAS 8 TO 10 FT N OF LINE 30N177E 25N170E 22S160E. 
.24 HOUR FORECAST SEAS 8 FT OR LESS ENTIRE AREA.
.48 HOUR FORECAST SEAS 8 FT OR LESS ENTIRE AREA.

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

.ITCZ 06N140W 04N162W 05N180E 07N166E 06N160E. ISOLATED MODERATE 
TSTMS WITHIN 90 NM OF ITCZ BETWEEN 178W AND 169W. 

$$

.FORECASTER POWELL. HONOLULU HI.