La Nina weather event confirmed by Bureau of Meteorology for Australia this summer

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A La Nina weather event has been declared. Photo: David Swift
Australians can expect a stormy summer that is cooler and wetter than usual.  Photo: David Swift
Australians can expect a stormy summer that is cooler and wetter than usual. Photo: David Swift

Australians can expect a stormy, cooler and wetter than usual summer with an officially confirmed La Nina weather event.

The Bureau of Meteorology said Tuesday afternoon that a La Nina was underway in the tropical Pacific after weeks of anticipation.

Last summer was also affected by the weather factor, ie The Ninas back to back for Australia.

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The meteorological office issued a La Nina “watch” on September 14, which it became a La Nina “alert” on October 12.

Much of eastern Australia has been hit over the past two months by heavy rains and thunderstorms, which last week inundated the Lachlan River watershed in west-central Nova Scotia. South Wales.

The La Nina weather phenomenon, linked to the changing pattern of sea surface temperatures across the Pacific and Indian Oceans, affects rainfall and temperature variations in Australia.

In general, it is associated with more abundant rainfall in the eastern, northern and central parts of the country, as well as a higher probability of tropical cyclones.

Eastern Australia was hit by heavy rains and wild thunderstorms in October and November.  Photo: NCA NewsWire / Damian Shaw
Eastern Australia was hit by heavy rains and wild thunderstorms in October and November. Photo: NCA NewsWire / Damian Shaw

Tropical Cyclone Paddy, the first of the 2021-2022 season, formed near Christmas Island on Monday, but the weather office says it does not pose an immediate threat to the mainland or offshore communities.

The Category One system will continue to slowly move south before moving west and starting to weaken later on Tuesday.

During La Nina, the waters of the central or eastern tropical Pacific become cooler than normal, persistent southeast to northwest winds strengthen in the tropical and equatorial Pacific, and clouds move westward. , closer to Australia.

Andrew Watkins, chief of operational climate services at the meteorological office, said the last major event in La Nina occurred in 2010-2012, resulting in widespread flooding and the wettest two-year spells on record in Australia.

“La Nina also performed in the spring and summer of 2020-21. Back-to-back La Nina events are not unusual, with around half of all past events returning for a second year, ”he said.

Dr Watkins said this year’s Nina is not expected to be as strong as the 2010-12 event and may even be weaker than what happened last summer.

“Each La Nina has different impacts, as it is not the only climatic factor affecting Australia at some point,” he said.

“That’s why it’s important not to look at it in isolation and to use the online office’s climate forecasting tools to get a sense of the likely conditions for the months ahead. “

The meteorological office says this La Nina event is expected to persist at least until the end of January 2022.

Sydney

Catie McLeod is a reporter for NCA NewsWire, covering the latest news on politics, crime, business and everything in between. Before joining the Sydney office, she spent 18 months at the Daily Advertiser in … Read More

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