High Seas Forecast
Issued by NWS
Issued by NWS
042 FZPN40 PHFO 201537 HSFNP HIGH SEAS FORECAST NATIONAL WEATHER SERVICE HONOLULU HI 1700 UTC MON MAY 20 2024 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 20 2024. 24 HOUR FORECAST VALID 1200 UTC MAY 21 2024. 48 HOUR FORECAST VALID 1200 UTC MAY 22 2024. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .TROUGH 30N159W 27N170W 18N171W MOVING W SLOWLY. ISOLATED MODERATE TSTMS WITHIN 180 NM OF TROUGH N OF 27N. .24 HOUR FORECAST TROUGH 30N162W 26N163W 18N172W. .48 HOUR FORECAST TROUGH 30N164W 24N167W 19N172W. .NE TO E WINDS 20 TO 25 KT FROM 16N TO 06N E OF 169W. S TO SE WINDS 20 TO 25 KT N OF 26N BETWEEN 159W AND 159W. E WINDS 20 TO 25 KT FROM 12N TO 06N W OF 162E. .24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT E OF LINE 23N150W 07N162W. .48 HOUR FORECAST WINDS NE 20 TO 25 KT E OF A LINE FROM 20N140W TO 17N156W TO 08N161W TO 06N140W. .OTHERWISE..WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA. .OTHERWISE...SEAS 8 FT OR LESS OVER REMAINDER OF FORECAST AREA. .ISOLATED MODERATE TSTMS S OF 08N W OF 166E. .ITCZ 06N140W 06N177W. ISOLATED MODERATE TSTMS WITHIN 180 NM OF ITCZ. $$ .FORECASTER THOMAS. HONOLULU HI.