The season was also the costliest recorded in the Australian region basin, with a total of $3.62 billion (2011 USD) in damages, mostly from the destructive Cyclone Yasi.

The TCWC's in Perth, Darwin, and Brisbane are run by the Bureau of Meteorology, who designate significant tropical lows with a number and the U suffix.

[15][2] During the middle of October, the Madden-Julian Oscillation (MJO) moved through the eastern Indian Ocean and left an area of enhanced atmospheric convection in its wake.

[16] This subsequently combined with an equatorial Rossby wave, which contributed to the formation of Tropical Low 01U to the southwest of Sumatra, Indonesia on 28 October 2010.

[16] Over the next day, the system moved slowly westwards, as atmospheric convection started to wrap into its consolidating low-level circulation centre, in an area of light to moderate vertical wind shear.

The next day, TCWC Jakarta reported that the low had intensified into a category 1 tropical cyclone on the Australian scale, naming it "Anggrek".

[20][21] Over the next day Abele weakened further because of cooler sea surface temperatures and increasing vertical wind shear, before it was last noted by both the BoM and JTWC during 5 December.

Early on Christmas Day (local time) it strengthened rapidly and was designated Tropical Cyclone Tasha when it was 95 km (59 mi) east northeast of Cairns.

[29] On 12 January, TCWC Brisbane started monitoring Tropical Low 10U that had developed, over the Coral Sea to the northeast of Townsville in Queensland, Australia.

[22][30] During 22 January TCWC Brisbane reported that Tropical Low 11U had developed within the northwestern Coral Sea to the northeast of Cairns, Australia.

[22][31] During that day the system may have become a category 2 tropical cyclone as radar and microwave imagery showed that Anthony had a well defined circulation and was forming a partial eyewall.

[22] During the next day as Anthony moved towards the southwest and the Queensland coast, the JTWC re-initiated advisories on the system, before reporting that it had peaked with 1-minute sustained wind speeds of 100 km/h (60 mph).

[22] Ahead of Anthony's landfall on the Queensland east coast, tropical cyclone watches and warnings were issued for the region between Innisfail, St Lawrence and Charters Towers.

[34] Gradual strengthening took place and on 25 January, the Joint Typhoon Warning Center (JTWC) began monitoring the system as Tropical Cyclone 10P.

[39] On the same day, the system started weakening rapidly and TCWC Perth downgraded Bianca into a Category 3 Severe Tropical Cyclone.

[43] As soon as Bianca became a category 3 Severe tropical cyclone, strong winds lashed through Pilbara suspending oil and gas production and port facilities.

[44] Though Bianca was moving away and the level of risk was going down, coastal communities between Onslow and Exmouth remained on a red alert as the system intensified.

[57] The storm was expected to reach minimal category 1 cyclone intensity (Australian scale) on 12 February but high shear, cool sea temperatures and poor organisation saw the system stay as a low.

[68] On 16 February the slow moving system strengthened into Tropical Cyclone Carlos causing localised flooding and damage to homes, with fallen trees.

[69] After looping around the Darwin area overnight and back over land the system weakened on 17 February and BOM downgraded it to a Tropical low.

[73] In the early hours of 21 February the system returned to the open waters of the Indian Ocean, causing it to redevelop back into a cyclone.

[75] The cyclone continued to track southwest at a relatively fast pace and produced a squall line that generated four tornadoes in the mining town of Karratha[76] which damaged 38 homes as well as numerous cars, buildings and a school.

Heavy rainfall was reported on the Dampier Peninsula east and southeast of Port Hedland, including Telfer and parts of the De Grey catchment.

[88][89] During February 2022, a reanalysis of the system showed that it had developed into a tropical cyclone during 2 April, before it made landfall on the northern Kimberley coast.

[22][90] Over the next couple of days the system moved southwards towards the Australian state of Kimberly and intensified gradually before it was declared a category 1 tropical cyclone and named Errol by the BoM early on 15 April.

[22][90] During February 2022, the BoM reanalysed the system and reported Errol had peaked as a Category 3 Severe tropical cyclone, with 10-minute sustained winds of 120 km/h (75 mph).

[92] On 30 December, TCWC Perth started issuing advisories on Tropical Low 06U that had developed inland over the Top End of Western Australia.

[93] On 1 January, when 06U had emerged over the Indian Ocean waters, it was forecast that it would intensify into a tropical cyclone, though shear had caused the low to struggle to develop.

[99] On 7 March, the BoM reported that Tropical Low 21U had developed within the Coral Sea, about 1,000 km (620 mi) to the northwest of Yeppoon, Queensland, Australia.

[102] Both lows did not intensify further and dissipated while last mentioned in the bulletins of TCWC Perth during 3 April, though 27U moved into the South-West Indian Ocean basin and the MFR gave the designation of 08R.