High Seas Forecast
Issued by NWS
Issued by NWS
238 FZPS40 PHFO 311144 HSFSP HIGH SEAS FORECAST NATIONAL WEATHER SERVICE HONOLULU HI 1130 UTC FRI JAN 31 2025 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 SOUTH PACIFIC EQUATOR TO 25S BETWEEN 120W AND 160E SYNOPSIS VALID 0600 UTC JAN 31 2025. 24 HOUR FORECAST VALID 0600 UTC FEB 01 2025. 48 HOUR FORECAST VALID 0600 UTC FEB 02 2025. .WARNINGS. ...GALE WARNING... .LOW NEAR 16S165E 1001 MB MOVING SE SLOWLY. TROUGHS FROM LOW TO 20S172E TO 22S178W TO 22S170W AND FROM LOW TO 13S160E. WINDS INCREASING TO 30 TO 35 KT WITHIN 180 NM OF LOW NE QUADRANT. ELSEWHERE WINDS 20 TO 30 KT OVER FORECAST WATERS S OF TROUGH AXIS...AND ALSO WITHIN 360 NM N OF TROUGH AXIS W OF 172E. SEAS BUILDING TO 8 TO 12 FT WITHIN 180 NM OF LOW NE SEMICIRCLE. SCATTERED MODERATE TSMTS WITHIN 480 NM N OF TROUGH AXIS W OF 172E. .24 HOUR FORECAST LOW NEAR 19S168E 988 MB. DEVELOPING FRONT FROM LOW TO 23S173E TO 25S177W. TROUGH FROM LOW TO 16S165E TO 13S160E. WINDS 30 TO 40 KT WITHIN 180 N OF LOW NE QUADRANT. WINDS 20 TO 30 KT ELSEWHERE WITHIN 240 NM OF LOW...OVER FORECAST WATERS S OF FRONT... AND ALSO WITHIN 480 NM EITHER SIDE OF TROUGH AXIS. SEAS 12 TO 15 FT WITHIN 180 NM OF LOW NE SEMICIRCLE. SEAS 8 TO 12 FT ELSEWHERE FROM 13S TO 23S BETWEEN 163E AND 173E. .48 HOUR FORECAST LOW NEAR 21S168E 999 MB. FRONT FROM LOW TO 23S173E TO 25S175W. TROUGH FROM LOW TO 18S164E TO 14S160E. WINDS 20 TO 30 KT OVER FORECAST WATERS S AND SE OF A LINE FROM 10S160E TO 15S175E 20S175W 25S170W. SEAS 8 TO 15 FT WITHIN AN AREA BOUND BY 12S165E 18S175E 25S175W 25S165E 12S165E. .SYNOPSIS AND FORECAST. .TROUGH FROM 06S158W TO 12S152W TO 17S140W MOVING WSW 15 KT. ISOLATED MODERATE TSTMS WITHIN 480 NM EITHER SIDE OF TROUGH. .24 HOUR FORECAST TROUGH FROM 06S170W TO 14S160W. .48 HOUR FORECAST TROUGH DISSIPATED. .TROUGH FROM 21S154W TO 25S150W NEARLY STATIONARY. ISOLATED MODERATE TSTMS FROM 21S TO 25S BETWEEN 165W AND 157W. .24 HOUR FORECAST TROUGH DISSIPATED. .TROUGH FROM 22S130W TO 24S120W NEARLY STATIOANRY. ISOLATED MODERATE TSTMS WITHIN 150 NM EITHER SIDE OF TROUGH. .24 HOUR FORECAST TROUGH DISSIPATED. .WINDS 20 KT OR LESS REMAINDER FORECAST AREA. .SEAS 8 FT OR LOWER REMAINDER FORECAST AREA. $$ .FORECASTER BEDAL. HONOLULU HI.