High Seas Forecast
Issued by NWS
Issued by NWS
533 FZPN40 PHFO 211449 HSFNP HIGH SEAS FORECAST NATIONAL WEATHER SERVICE HONOLULU HI 1700 UTC TUE MAY 21 2024 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 MAY 21 2024. 24 HOUR FORECAST VALID 1200 UTC MAY 22 2024. 48 HOUR FORECAST VALID 1200 UTC MAY 23 2024. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .TROUGH FROM 29N161W TO 24N164W TO 17N174W MOVING W 10 KT. ISOLATED MODERATE TSTMS WITHIN 180 NM OF TROUGH. .24 HOUR FORECAST TROUGH FROM 30N164W TO 17N169W. .48 HOUR FORECAST TROUGH FROM 30N166W TO 23N167W TO 17N170W. .TROUGH FROM 30N168W TO 28N170W MOVING N 10 KT. .24 HOUR FORECAST TROUGH DISSIPATED. .24 HOUR FORECAST NEW TROUGH FROM 19N176W TO 14N179W. .48 HOUR FORECAST TROUGH FROM 21N179E TO 13N174E. .NE TO E WINDS 20 TO 25 KT FROM 22N TO 07N E OF 153W. .24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT E OF A LINE FROM 30N149W TO 25N156W TO 07N159W TO 06N140W. .48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT N OF 07N E OF 159W. .SEAS 8 TO 9 FT FROM 18N TO 08N E OF 145W. .24 HOUR FORECAST SEAS 8 TO 9 FT FROM 18N TO 07N E OF 150W. .48 HOUR FORECAST SEAS 13N TO 07N BETWEEN 145W AND 155W. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS 8 FT OR LESS. .ISOLATED MODERATE TSTMS FROM 05N TO 10N W OF 162E. .ITCZ FROM 06N140W TO 06N179E. ISOLATED MODERATE TSTMS WITHIN 210 NM OF ITCZ. $$ .FORECASTER THOMAS. HONOLULU HI.