IDY21030 40:2:1:04:70S075E35060:01:00 SECURITE High Seas Weather Warning for METAREA 10 Issued by the Australian Government Bureau of Meteorology At 0002UTC 20 May 2026 GALE WARNING 4 FOR WESTERN AND SOUTHERN AREAS SITUATION AT 200000UTC Forecast vigorous flow associated with cold front 42S071E 48S078E to low 969hPa near 53S074E at 200900UTC, then 43S074E 50S080E to low 965hPa 54S075E at 201200UTC, 44S079E 50S084E 56S081E to low 969hPa near 56S077E at 201800UTC and then 50S088E 53S090E 58S086E to low 956hPa near 57S078E at 210000UTC. AREA AFFECTED Bounded by 43S080E 43S093E 60S092E 60S080E 43S080E. FORECAST Northerly quarter winds developing within 240nm east of cold front from 201200UTC, then, shifting clockwise in northeastern quadrant of low within 240nm, after 202100UTC. Wind speeds 30/40 knots. Rough to very rough seas. Moderate to 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