


High Seas Forecast
Issued by NWS
Issued by NWS
589 FZPS40 PHFO 072256 HSFSP HIGH SEAS FORECAST NATIONAL WEATHER SERVICE HONOLULU HI 2330 UTC TUE OCT 07 2025 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 1800 UTC OCT 07 2025. 24 HOUR FORECAST VALID 1800 UTC OCT 08 2025. 48 HOUR FORECAST VALID 1800 UTC OCT 09 2025. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .FRONT 25S121W 22S127W 20S135W 21S143W MOVING E 10 KT E OF 127W AND NEARLY STATIONARY ELSEWHERE. WINDS 20 TO 25 KT S OF LINE 25S151W 14S150W 25S128W. ISOLATED MODERATE TSTMS FROM 21S TO 17S BETWEEN 144W AND 138W. .24 HOUR FORECAST FRONT 25S120W 19S122W 18S130W THENCE TROUGH 18S140W. WINDS 20 TO 30 KT S OF LINE 25S146W 14S151W 15S138W 18S131W 22S123W 25S120W. .48 HOUR FORECAST FRONT 18S120W 15S126W THENCE TROUGH 15S143W. WINDS 20 TO 30 KT S OF LINE 25S129W 19S148W 13S140W 15S130W 22S124W 22S120W. .TROUGH 23S120W 20S123W MOVING SW SLOWLY. .24 HOUR FORECAST TROUGH ABSORBED BY FRONT DESCRIBED IMMEDIATELY ABOVE. .FRONT 25S163W 21S165W 17S168W THENCE TROUGH 08S178E 04S172E. FRONT MOVING SE 10 KT. TROUGH MOVING E 15 KT S OF 10S AND MOVING W SLOWLY N OF 10S. WINDS 20 TO 25 KT S OF 23S WITHIN 90 NM OF FRONT. NUMEROUS MODERATE TO STRONG TSTMS WITHIN 270 NM OF TROUGH N OF 14S. .24 HOUR FORECAST FRONT 25S160W 21S161W THENCE TROUGH 13S166W 08S172E 04S168E. WINDS 20 TO 25 KT FROM 21S TO 07S BETWEEN 161E AND 167W. .48 HOUR FORECAST FRONT 25S155W 20S157W THENCE TROUGH 15S173W 07S164E 03S160E. WINDS 20 TO 25 KT S OF LINE 25S171W 20S163W 08S171E 08S160E. .TROUGH 16S160W 09S163W 05S170W MOVING SW 10 KT. ISOLATED MODERATE TSTMS WITHIN FROM 17S TO 09S BETWEEN 165W AND 155W...AND FROM 09S TO 05S BETWEEN 170W AND 167W. .24 HOUR FORECAST TROUGH MERGED WITH FRONT AND TROUGH DESCRIBED IMMEDIATELY ABOVE. .WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA. .SEAS 2.5 TO 4 M S OF A LINE 25S171W 20S170E 10S175E 24S165W 13S157W 09S137W 00S120W. .24 HOUR FORECAST SEAS 2.5 TO 4 M S OF A LINE 25S165W 15S164W 10S133W 04S133W 02S120W. SEAS 2.5 TO 3 M S OF A LINE 25S163E 23S168E 13S168E 08S162E 10S178E 13S173W 20S177W 25S173E. .48 HOUR FORECAST SEAS 4 TO 5 M S OF 19S E OF 128W. SEAS 2.5 TO 4 M ELSEWHERE S OF 08S E OF 163W. SEAS 2.5 TO 3 M S OF 08S BETWEEN 161E AND 170W. .SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA. .ISOLATED MODERATE TSTMS FROM 14S TO 12S W OF 163E AND FROM 07S TO 02S W OF 165E. $$ .FORECASTER TROTTER. HONOLULU HI.