IDY21091 40:2:1:04:70S125E35045:01:00 SECURITE High Seas Weather Warning for METAREA 10 Issued by the Australian Government Bureau of Meteorology At 0003UTC 20 May 2026 GALE WARNING 11 FOR SOUTHERN AND SOUTHEASTERN AREAS SITUATION AT 200000UTC Vigorous flow associated with trough near 48S144E 54S145E. Forecast near 49S150E 56S152E at 200600UTC, near 48S154E 56S156E at 201200UTC, near 49S158E 54S160E at 201800UTC, and then weakening. AREA AFFECTED Bounded by 49S139E 48S160E 55S160E 56S139E 49S139E. FORECAST Southwesterly quarter winds 30/40 knots within 300nm west of trough. Winds easing below 34 knots by 210000UTC. Rough to very rough seas. 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 0700 UTC 20 May 2026