IDY21030 40:2:1:04:70S100E35060:01:00 SECURITE High Seas Weather Warning for METAREA 10 Issued by the Australian Government Bureau of Meteorology, BNOC At 0621UTC 25 November 2020 GALE WARNING FOR WESTERN, SOUTHERN AND SOUTHEASTERN AREAS 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. SITUATION AT 0600UTC Vigorous flow associated with a trough 52S137E 44S135E. Forecast 46S143E 54S145E at 251200UTC, 43S147E 49S148E 54S152E at 251800UTC, 46S148E 51S150E at 251800UTC, 44S150E 53S154E at 260000UTC and 45S155E 53S157E by 260600UTC. AREA AFFECTED Bounded by 51S126E 51S136E 55S134E 52S147E 53S155E 47S155E 44S148E 46S143E 44S134E 48S123E 51S126E. FORECAST Northwesterly quarter winds within 300nm east of trough tending southwesterly quarter within 540nm west of front, decreasing to 300nm west of front after 251200UTC. Wind speed 35/45 knots, easing to 30/40 knots after 251200UTC. Very rough to high seas, abating to rough to very rough seas after 251200UTC. Moderate to heavy swell.