IDY21000 40:2:1:04:70S100E35060:01:00 SECURITE High Seas Weather Warning for METAREA 10 Issued by the Australian Government Bureau of Meteorology At 0552UTC 20 July 2026 GALE WARNING 1 FOR WESTERN, SOUTHEASTERN AND SOUTHERN AREAS SITUATION AT 200600UTC Vigorous flow associated with cold front near 46S126E 50S128E 53S126E. Forecast cold front weakening near 47S131E 52S134E to developing low 972hPa near 56S132E at 201200UTC, just low 967hPa near 59S138E at 201800UTC, low 962hPa near 62S140E at 210000UTC, and low 959hPa near 64S141E at 210600UTC. AREA AFFECTED Bounded by 63S137E 63S150E 54S140E 47S132E 45S125E 53S125E 53S127E 63S137E. FORECAST Westerly quarter winds 30/40 knots within 120nm west of front shifting northwesterly quarter 30/40 knots within 120nm east of front initially, transitioning to just clockwise winds 34/47 knots within 240nm of low in northern semicircle from 201200UTC. Rough to very rough seas, rising to very rough to high from 201200UTC. 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 1300 UTC 20 July 2026