IDY10250 SECURITE High Seas Forecast for Southern METAREA 10 SOUTHERN AREA: 50S80E TO 50S160E TO ICE EDGE Issued by the Australian Government Bureau of Meteorology For 24 hours commencing 2300 UTC 18 September 2026 Part 1 Warnings Refer to latest warnings for boundary of affected area and type of weather system. Melbourne Storm Force Wind Warning 2. Melbourne Gale Warning 6. Melbourne Gale Warning 8. Melbourne Gale Warning 10. Melbourne Gale Warning 11. Melbourne Gale Warning 12. Part 2 Situation at 181800 UTC Trough 55S145E 57S160E. Forecast near 50S162E 58S164E at 190600UTC and exiting east thereafter. Cold front 50S107E 58S114E. Forecast near 50S126E to strengthening low [1] 950hPa near 58S131E to strengthening warm front [1] 57S138E at 190900UTC, and then cold front 50S142E 56S147E to low [1] 940hPa near 61S149E to warm front [1] 62S153E 59S160E at 200000UTC. Low [2] 945hPa near 63S112E to warm front [2] 64S122E 61S137E. Forecast decaying low [2] 950hPa near 63S116E to warm front [2] 63S140E at 190600UTC, and then just warm front [2] near 62S118E 63S147E at 200000UTC. Forecast warm front [3] entering from west near 63S077E 61S082E at 191800UTC, then near 64S078E 61S088E at 200000UTC. Part 3 Forecast Refer to latest warnings for details of the area affected. Whole area, outside warning areas: Westerly quarter winds, shifting southeasterly quarter within 180nm south of trough, shifting easterly quarter south of warm front [1], shifting northeasterly quarter within 60nm south of warm front [2], shifting northwesterly quarter within 600nm east of cold front and north of warm front [3]. Southwesterly quarter winds within 420nm west of trough and within 540nm west of cold front. Wind speeds 20/33 knots. Rough to very rough seas. Moderate to heavy swell. Rain areas, scattered showers and isolated thunderstorms mainly within 240nm of fronts and lows. Visibility reducing below 2nm in precipitation. Part 4 Ice edge Approximately 57S080E 59S090E 58S100E 60S110E 62S120E 63S130E 62S140E 61S150E 61S160E. Please be aware Wind and wave forecasts are averages. Wind gusts can be 40 per cent stronger than the forecast, and stronger still in squalls and thunderstorms. Maximum waves can be twice the forecast height. WEATHER MELBOURNE The next routine forecast will be issued at 09:00 UTC Saturday.