IDY21090 40:2:1:04:70S100E35060:01:00 SECURITE High Seas Weather Warning for METAREA 10 Issued by the Australian Government Bureau of Meteorology At 1759UTC 17 September 2025 HURRICANE FORCE WIND WARNING 10 FOR SOUTHEASTERN, WESTERN, AND SOUTHERN AREAS SITUATION AT 171800UTC Vigorous flow associated with weakening cold front 50S141E 55S138E to low 944hPa near 56S130E. Forecast just low 940hPa near 58S131E at 180000UTC, low 939hPa near 60S132E at 180600UTC, low 941hPa near 61S133E at 181200UTC, and low 941hPa near 61S135E at 181800UTC. AREA AFFECTED Bounded by 50S121E 49S131E 50S144E 62S146E 62S121E 50S121E FORECAST Northwesterly quarter winds 34/47 knots within 180nm east of cold front, turning clockwise 34/47 knots within 420nm of low. Wind speeds increasing to 48/63 knots within 180nm of low in northern semicircle. Winds increasing further to 60/70 knots within 180nm of low in northern quadrant. Winds easing below 64 knots by 180000UTC, and easing below 48 knots by 180900UTC. Very rough to high seas, rising to very high seas in storm force winds, and rising to phenomenal seas in hurricane force winds. Heavy swell. 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. The next alert will be issued by 0100 UTC 18 September 2025