Tropical Cyclone Bianca
Tropical cyclone Bianca developed off the Western Australian coast on February 23 2025. TC Bianca moved west then southwest while developing to a severe tropical cyclone. STC Bianca then turned to the south and deteriated to a low pressure system by February 27 2025. Bianca did not pose any direct threat to WA mainland or island communities.
A tropical low (21U) developed in the Timor Sea, northwest of the Kimberley coast on 18 February. Between the 19 and 23 February the system tracked generally west southwest, well offshore of the coast of Western Australia. Bianca developed into a tropical cyclone at 8 pm WST 23 February. Conditions were moderately favourable and Bianca intensified, it reached a peak 10-minute mean intensity of 165 km/h (90 knots) at 8 am WST 25 February while located well to the west of Exmouth. As the system turned more south in its direction of motion conditions became less favourable with increased vertical wind shear and cooler sea surface temperatures and Bianca began to weaken. Bianca weakened to below tropical cyclone strength at 2 am 27 February and the weak low-level centre was steered westwards into the Indian Ocean.
There were no impacts to the Australian mainland or Island communities from this system.
Severe Tropical Cyclone Bianca was the eighth tropical cyclone in the Australian region for the 2024/25 season.
Extreme values during cyclone event (estimated)
Maximum Category: 4
Maximum sustained wind speed: 165 km/h
Maximum wind gust: 230 km/h
Lowest central pressure: 958 hPa
From www.bom.gov.au
