


High Seas Forecast
Issued by NWS
Issued by NWS
380 FZPN40 PHFO 122247 HSFNP HIGH SEAS FORECAST NATIONAL WEATHER SERVICE HONOLULU HI 2300 UTC SUN OCT 12 2025 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 1800 UTC OCT 12 2025. 24 HOUR FORECAST VALID 1800 UTC OCT 13 2025. 48 HOUR FORECAST VALID 1800 UTC OCT 14 2025. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .TROUGH 30N178E 27N170E 26N164E MOVING NE 10 KT. .24 HOUR FORECAST TROUGH 30N1722 27N180W 27N170E. .48 HOUR FORECAST TROUGH DISSIPATED. .LOW 30N164W 1017 MB MOVING E 10 KT. TROUGH FROM LOW TO 27N169W. .24 HOUR FORECAST LOW 30N161W 1018 MB. TROUGH FROM LOW TO 24N170W. .48 HOUR FORECAST LOW WEAKENS TO TROUGH 28N163W 25N165W 22N170W. .TROUGH 30N150W 25N158W MOVING NW SLOWLY. .24 HOUR FORECAST TROUGH 28N151W 25N155W. .48 HOUR FORECAST TROUGH DISSIPATED. .TROUGH 14N165W 05N166W MOVING W 15 KT. .24 HOUR FORECAST TROUGH 15N169W 09N168W. .48 HOUR FORECAST TROUGH 12N170W 08N173W. .TROUGH 10N165E 01N173E MOVING W 15 KT. .24 HOUR FORECAST TROUGH 09N165E 05N165E. .48 HOUR FORECAST TROUGH 10N163E 04N164E. .WINDS 20 KT OR LESS OVER ENTIRE AREA. .SEAS 2.5 TO 4 M N OF LINE 15N160E 15N180W 25N165W. .24 HOUR FORECAST SEAS 2.5 TO 4 M N OF LINE 15N160E 10N170E 10N165W 25N155W. .48 HOUR FORECAST SEAS 2.5 TO 4 M N OF LINE 30N170E 10N170E 10N170W 30N150W. .SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA. .ITCZ 08N140W 08N150W 09N156W...AND 09N168W 08N175W. SCATTERED MODERATE TSTMS FROM 05N TO 13N BETWEEN 158W AND 178W. .SCATTERED MODERATE TSTMS FROM 10N TO 20N W OF 165E. ISOLATED MODERATE TSTMS FROM 00N TO 06N BETWEEN 175E AND 170E. $$ .FORECASTER PECHACEK. HONOLULU HI.