Australians are most likely in for a third year of wetter weather than usual with forecasters predicting a 70 per cent likelihood of La Nina remaining.
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La Nina is a weather phenomenon that leads to cooler but wetter weather, with above-average rainfall in Australia's east and north.
The weather pattern has been the driver of Australia's recent bout of devastating floods.
About half of La Nina events in the last 100 years had caused flooding in the north central region of Victoria, including the major flood event of 2011 along the Campaspe and Loddon river systems.
Cooling is under way in the tropical Pacific Ocean, with the Bureau of Meteorology saying La Nina events have developed 70 per cent of the time under these conditions.
This is on top of a "negative" Indian Ocean Dipole, where the waters are cooler in the ocean's west than in its east, and westerly winds hit Australia's northwest.
Australia experienced back-to-back La Nina years in 2020 and 2021.
In July, meteorologists put the odds of La Nina returning at 50/50 but a final declaration can't be made until October or November at the earliest.
If confirmed, 2022 would see the fourth instance of three consecutive La Nina events since records began in 1900.
Australian Associated Press
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