IDY21091 40:2:1:04:70S100E35060:01:00 SECURITE High Seas Weather Warning for METAREA 10 Issued by the Australian Government Bureau of Meteorology At 1732UTC 26 August 2026 GALE WARNING 11 FOR WESTERN, SOUTHEASTERN AND SOUTHERN AREAS SITUATION AT 261800UTC Vigorous flow associated with trough near 51S104E 56S108E. Forecast near 52S115E developing low 972hPa near 57S116E at 270000UTC, near 51S122E to low 966hPa near 58S123E at 270600UTC, near 49S132E to low 962hPa near 59S130E at 271200UTC, and near 46S145E 57S141E to low 961hPa near 60S136E at 271800UTC. AREA AFFECTED Bounded by 50S102E 51S112E 46S146E 52S148E 61S134E 60S117E 55S106E 50S102E. FORECAST Northwesterly quarter winds within 240nm east of trough. Winds shifting southwesterly quarter winds within 240nm west of trough, and expanding to within 360nm west of trough at 270600UTC. Winds turning clockwise within 180nm of low in the northwestern semicircle from 270300UTC. Wind speed 34/45 knots. Very rough to high 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 0100 UTC 27 August 2026