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Brace yourself for a wet summer! BoM confirms La Nina is back

The Lismore App

24 November 2021, 2:00 AM

Brace yourself for a wet summer! BoM confirms La Nina is backIMAGE: BoM/supplied

It's the news none of us wanted to hear but we pretty much thought it - we are in for a wet summer with the Bureau of Meteorology confirming the La Nina weather pattern is back! 


As a result, the Bureau is predicting a wetter than average Summer with more severe storms which are concerning for flood-prone and low-lying areas. 



The Bureau’s Head of Operational Climate Services, Dr Andrew Watkins, said that typically during La Niña events, rainfall becomes focused in the western tropical Pacific, leading to wetter than normal periods for eastern, northern and central parts of Australia.


“La Niña also increases the chance of cooler than average daytime temperatures for large parts of Australia and can increase the number of tropical cyclones that form," Dr Watkins said.


"La Niña is also associated with earlier first rains of the northern wet season, as we've observed across much of tropical Australia this year.


"The last significant La Niña was 2010–12. This strong event saw large impacts across Australia, including Australia’s wettest two-year periods on record, and widespread flooding.


"La Niña also occurred during spring and summer of 2020-21. Back-to-back La Niña events are not unusual, with around half of all past events returning for a second year."


Dr Watkins said that this year's event is not predicted to be as strong as the 2010-12 event and may even be weaker than in 2020-21 La Niña event.


“Every La Niña has different impacts, as it is not the only climate driver to affect Australia at any one time. That's why it is important not to look at it in isolation and use the Bureau’s climate outlooks tools online to get a sense about likely conditions for the months ahead,” Dr Watkins said.


While the last 7-days have been reasonable in Lismore compared to other parts of the state with less than 35mm falling, we are being told to prepare ourselves with more wet stuff on the way. 



We can expect between up to 15mm tomorrow meanwhile Friday looks to be wetter with up to 20mm forecast. 


High humidity will also be about in the coming days and temperatures will remain fairly stable reaching a top of 26 degrees. 


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