High Seas Forecast
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
000
FZPN40 PHFO 200338
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC FRI APR 20 2018

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 APR 20 2018.
24 HOUR FORECAST VALID 0000 UTC APR 21 2018.
48 HOUR FORECAST VALID 0000 UTC APR 22 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 03N163E 1007 MB MOVING W NEAR 10 KT. TROUGH FROM 03N160E TO
LOW TO 06N172E. SCATTERED MODERATE ISOLATED STRONG TSTMS WITHIN
300 NM NE QUADRANT AND WITHIN 200 NM W SEMICIRCLE OF CENTER.
.24 HOUR FORECAST 02N160E 1008 MB.
.48 HOUR FORECAST LOW MOVED W OF FORECAST AREA TO NEAR 02N159E
1007 MB.

.DISSIPATING TROUGH FROM 30N154W TO 25N158W NEARLY STATIONARY.
ISOLATED TSTMS WITHIN 120 NM S OF A LINE FROM 23N162W TO
17N172W...AND BETWEEN 26N AND 20N FROM 160W AND 150W.
.24 HOUR FORECAST TROUGH DISSIPATED.

.FRONT JUST N OF 30N160E NEARLY STATIONARY.
.24 HOUR FORECAST FRONT...NO SIGNIFICANT CHANGE. LOW 1013 MB
AT 29N154E MOVING NE 10 KT.
.48 HOUR FORECAST LOW AT 31N157E 1009 MB WITH FRONT EXTENDING THRU
28N158E MOVING E SLOWLY. S WINDS 20 TO 25 KT N OF 26N W OF 165E.

.RIDGE FROM 30N176E TO 27N160E NEARLY STATIONARY.

.E WINDS 20 TO 25 KT BETWEEN 09N AND 18N E OF 175W...AND IN AREA
FROM 20N TO 23N E OF 150W.
.24 HOUR FORECAST E WINDS 20 TO 25 KT BETWEEN 09N AND 21N E OF 172W.
.48 HOUR FORECAST E WINDS 20 TO 30 KT BETWEEN 08N AND 21N E OF
180W...AND BETWEEN 08N AND 18N W OF 180W.

.SEAS 8 TO 9 FT FROM 07N TO 18N E OF 170W...AND FROM 10N TO 22N W OF
170W.
.24 HOUR FORECAST SEAS 8 TO 10 FT BETWEEN 08N AND 19N E OF 180W...
AND N OF 19N BETWEEN 143W AND 150W.
.48 HOUR FORECAST SEAS 8 TO 9 FT BETWEEN 06N AND 24N E OF 155W...AND
BETWEEN 10N AND 20N FROM 155W TO 180W.

.WINDS 20 KT OR LESS AND SEAS 8 FT OR LESS REST OF AREA.

.ITCZ FROM 07N140W TO 07N153W TO 09N160W TO 10N180W TO 06N165E.
SCATTERED MODERATE TSTMS WITHIN 160 NM OF ITCZ BETWEEN 160W AND 170W.
ISOLATED MODERATE TSTMS ELSEWHERE WITHIN 300 NM N AND ELSEWHERE
WITHIN 200 NM S OF REST OF ITCZ.

$$

.FORECASTER LAU. HONOLULU HI.



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.