The 2000–01 Australian region cyclone season was an event in the ongoing cycle of tropical cyclone formation. It began on 1 November 2000 and ended on 30 April 2001. The regional tropical cyclone operational plan also defines a tropical cyclone year separately from a tropical cyclone season, which runs from 1 July 2000 to 30 June 2001.
Cyclone Sam was an intense Category 3 cyclone that did heavy damage cross northwestern Australia. The cyclone damaged a train station and knocked down trees. Operationally, the Bureau of Meteorology considered Sam to have been a Category 5 cyclone; however, post-storm analysis indicated that winds peaked at 195 km/h (120 mph), ranking the storm as a high-end Category 4.
Offshore, two boats carrying a total of 167 illegal immigrants sank off the coast of Australia amidst rough seas produced by Sam. Officials confirmed the deaths of 163 of these after only four people were rescued by a Japanese tanker ship. The large loss of life ranked Sam as the second-deadliest tropical cyclone in Australian history.
Terri formed on 27 January 2001 near the northern Kimberley coast. The storm paralleled the coast, reaching Category 2 strength before making landfall near Pardoo early on 31 January. The storm dissipated Late on the same day.
Cyclone Vincent formed on 7 February 2001, 900 km northwest of Onslow, Western Australia from an active monsoonal trough. Wind shear prevented the tropical low from intensifying for a few days, but once the storm formed it began to move southeast and intensify. Soon it intensified into a Category 2 cyclone. Wind shear soon became stronger and Cyclone Vincent weakened to a Category 1 cyclone. Cyclone Vincent crossed the Western Australia coast as a tropical low, a few km south of Broome, Western Australia.
Tropical Cyclone Wylva hit the coast of Australia in February 2001. Although it was a weak Category 1 cyclone when it peaked in strength, it caused heavy damage when it made landfall. Heavy rain produced a record-breaking flood, which washed down the Victoria River. Damages were worth $13 million dollars and 700 people were evacuated from the dangerous flood waters.
Walter was a storm that formed east of Christmas Island and tracked westward at a low latitude.
On 3 April, Cocos Island was placed under a cyclone watch as Walter approached the island. Throughout 5 April, heavy rains and high winds, estimated up to 90 km/h (56 mph) battered the area as Walter bypassed the island.
The second most damaging cyclone of the 2000-01 Cyclone season, Alistair made landfall close to Carnarvon on 24 April 2001 as a poorly organized cyclone. The centre passed just to the north of town with a wind gust to 67 kilometres per hour from the northeast recorded at 4:11 am. Minimum pressure of 1002.9 hPa was recorded at 5 am, followed by the peak recorded wind gust of 90 kilometres per hour from the southeast at 6 am. A total of 24 mm of rainfall was reported in Carnarvon. Plantations to the north of Carnarvon reported 30-40% crop losses, with wind estimates of 100 to 110 kilometres per hour.