


High Seas Forecast
Issued by NWS
Issued by NWS
403 FZPS40 PHFO 301020 HSFSP HIGH SEAS FORECAST NATIONAL WEATHER SERVICE HONOLULU HI 1130 UTC SAT AUG 30 2025 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 AUG 30 2025. 24 HOUR FORECAST VALID 0600 UTC AUG 31 2025. 48 HOUR FORECAST VALID 0600 UTC SEP 01 2025. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .FRONT 20S120W 18S127W 17S138W 19S145W MOVING E 15 KT E OF 127W AND NEARLY STATIONARY ELSEWHERE. .24 HOUR FORECAST FRONT AND TROUGH DISSIPATED. .FRONT 25S160W 22S167W THENCE TROUGH 16S178W 11S179E. FRONT MOVING E 10 KT AND TROUGH MOVING SW SLOWLY. SCATTERED MODERATE TSTMS FROM 16S TO 09S BETWEEN 171E AND 178W. .24 HOUR FORECAST FRONT 25S147W 22S153W THENCE TROUGH 20S166W. SECOND DETACHED TROUGH 17S179E 08S176E. .48 HOUR FORECAST FRONT 25S130W 20S142W THENCE TROUGH 19S163W. SECOND DETACHED TROUGH 17S174E 08S164E. .24 HOUR FORECAST NEW FRONT 25S174E 21S169E. .48 HOUR FORECAST FRONT MOVED S OF AREA. .WINDS 20 KT OR LESS OVER ENTIRE FORECAST AREA. .SEAS 2.5 TO 4.0 M S OF 04S E OF 140W. .24 HOUR FORECAST SEAS 2.5 TO 3.0 M S OF 02S E OF 136W...AND S OF LINE 22S160E 25S169E. .48 HOUR FORECAST SEAS 2.5 TO 4.0 M S OF LINE 20S160E 20S171E 25S175W. SEAS 2.5 TO 3.0 M E OF LINE 01S120W 08S133W 25S121W. .SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA. .ISOLATED MODERATE TSTMS 11S TO 08S BETWEEN 170W AND 168W...AND FROM 13S TO 07S W OF 166E. $$ .FORECASTER PIERCE. HONOLULU HI.